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Testimonials |
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Please fill out our Customer Survey and submit your own Testimonial! |
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Testimonial Received: 04/20/2012
Bill and the entire ThunderMAX/Zipper's Team:
It was such an honor to have the opportunity to join all of you at the 2012 V-twin Expo. After we received our ThunderMAX EFis, I was amazed to see all the changes it made to the performance of our bikes. I couldn't help but think of all the programming, data acquisition and manufacturing that went into each unit With such a blurry line between "Made In" and "Assembled In" the USA its hard to tell what is genuinely made here. I originally assumed there was some factory across seas teaming with moto lab rats creating the complicated circuitry and programming. I was delightfully surprised when I realized how and where the ThunderMAX units are made.
The team at ThunderMAX/Zipper's is inspiring. They are a true testament to the ingenuity, creativity and craftsmanship that lie within the USA After speaking with all of you, it became evident the very important role each of you play in the construction and marketing of your finished products. More importantly, all of you expressed a passion and a love that brought you together for a higher purpose beyond collecting a paycheck. I really enjoyed hearing how each one of you eventually found your home and a place on the team.
I really like how you communicate the benefits of the ThunderMAX to your customers. You have built a product and a company with a solid foundation of pride. Thank you for your hospitality, generosity and continued support. I look forward to working with all of you in the future and helping to exhibit what an great product you have made.
Sincerely,
Rob Carpenter
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Testimonial Received: 03/07/2012
“I want to give you folks (Zipper’s Performance) a big kudos for you great customer service. I ordered some parts yesterday online. Later I received a call from one of your customer service professionals, informing me that I had ordered the wrong part for the setup I had. You don't see this kind of great personal service these days. Thanks again.”
-G.B., sent via Email
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Testimonial Received: 02/27/2012
“This simple mod (ThunderMax®) stopped all my pinging! 37G, 95" head work, 9.8 comp on 05 Dyna®, now use same unit on 06 Road Glide®, same components. Well worth the install.”
– Steve, sent via Website
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Testimonial Received: 02/27/2012
“(ThunderMax®) Worked GREAT on the Road Glide! I am installing another one on the Electra Glide with Sidecar!!"
- L.M. – sent via Facebook
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Testimonial Received: 02/27/2012
“Just installed my ThunderMax® over the weekend... So far, I love it. I am riding to work tonight - can't wait. The throttle is much more responsive. Thanks, guys, for making a GREAT product. I will leave some more info as I get some more miles under my belt… I’m sure it will be more positives. 2010 FLHX 96CI."
- B.D., sent via Facebook
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Testimonial Received: 02/15/2012
“One and a half year later, ThunderMax® is going strong. 20,000 miles later my old EVO 80 rides with the big dogs. Have a 1998 ultra with a little cam and run with the newer 110 SE Ultra's®.
Still going strong after 4 or 5 downloads. I don't even to bother to do it anymore. Every time I hook it to the computer, it says I'm on the money and it runs like it too! BEST BUCKS EVER SPENT!!!
Thank you ThunderMax®”
- H.D., sent via Website
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Testimonial Received: 02/14/2012
“I have been running the ThunderMax® with Auto Tune for over two years with no problems at all. I have changed complete exhaust systems two times and all I have to do is just ride. The ThunderMax® makes all the changes needed. Starts quick and throttle response is crisp! Thanks ThunderMax® for a great product.”
- D.K., sent via Facebook
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Testimonial Received: 02/07/2012
“I can't live without my ThunderMax® ECM! THANX FELLAS. ;-)”
T.D., sent via Facebook
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Testimonial Received: 01/18/2012
“As a dealer and a customer, not only is the Zipper’s ThunderMax® with AutoTune a no brainer for my bikes and customers, all Zipper’s products are a must have for the motorcycle enthusiast!”
- H.D. at HD Performance, sent via Email
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Testimonial Received: 01/18/2012
“ThunderMax® has given me lightening throttle response and serious high-end performance. Every time I dig harder, I seem to find more power. The folks at Zipper’s couldn't be nicer!”
- T.L., DE
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Testimonial Received: 01/07/2012
“I had the ThunderMax® module installed on my 2004 Harley® Ultra® at Sturgis in 2011. What a difference! Awesome performance instantly! So far, I had the chance to test the module at high altitude, sea level, during cold weather, hot weather, humid, as well as dry climates. Amazing performance! After 4,550 miles since installation, I can recommend this product to anyone who wants instant pep right out of the box. In short, I am in love with it.”
- F.S., IL
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Testimonial Received: 11/24/2011
“You guys are awesome! I have talked 4 of my friends into getting the ThunderMax®... One ride on my bike was enough to sale them on it. We just installed a ThunderMax® EFI with the AutoTune on a friends ’07 Road King®. He has the 96" with a SE high flow and the V&H Pro Pipe 2-1.
My bike is running even better with the new tune. I can't say enough about this product. I rode with the Goldwing® Riders of SC last week and they said mine was the fastest, close to stock, Harley® they have ever ridden with. 132 mph! Dyno’s at 97 HP & 103 FT LBS Thanks again.”
- M.S., sent via Email
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Testimonial Received: 11/03/2011
“I ride a 2003 FLHRI® (Road King® – 100th Anniversary) that I bought/ordered in 2002.
I’m writing because I just wanted to let Zipper’s know that earlier this year, I had my HD dealer (Lancaster Harley-Davidson®) install a new Zipper’s ThunderMax® system, new header pipes (with O2 sensor bungs) and Reinhart Mufflers. My purpose was 3-fold:
1. I wanted to get better mileage (closer to when the bike was original (38-40 mpg) and before I had added a higher flow air filter, less restrictive mufflers and another tuning system.)
2. I wanted a better sound than the “new” mufflers I had installed.
3. I wanted the bike to be more ecologically “friendly” to the environment.
After checking my mileage at my last full tank refill, I have achieved all 3 goals with flying colors.
I’m still “on the border” with installing the “quiet” option baffles from Rinehart, but I am confident that the ThunderMax® will excel with either decision I make.
Your company has a fantastic product and I personally can’t say enough good things about it – or Lancaster Harley-Davidson®.”
- L.L., sent via Email
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Testimonial Received: 10/19/2011
“You guys installed the ThunderMax® on my bike while I was in Daytona. I could see a big difference - bike runs smoother, cooler, and has a lot more power. I rode back from Daytona to Virginia, and my bike rode like a dream.”
- J.B., VA
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Testimonial Received: 10/14/2011
“We all wanted to say a big "Thank You!" to Jeff and Dan for being so amazing and helpful. You guys rocked out an awesome pre-mapped system for us for our customer's 106" Custom Deuce®. Thank you for the fast service and spot-on programming. You have helped us make our customer one very happy guy! You all rock!”
- The crew at Full Throttle MC Accessories
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Testimonial Received: 10/06/2011
“Put in a set of Red Shift® 575 cams and you will really be happy! They make your bike run like a whole different bike - awesome power band, and VERY smooth power!"
- P.R., sent via Facebook
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Testimonial Received: 09/29/2011
“I'm so happy with my ThunderMax®! Every Harley® I've owned has made laboring sounds at low rpm takes offs. I think of them as engine laboring sounds, like primary chain and or valve train clatter… These sounds are nonexistent now. I've ridden bikes well over 45 yrs and I'm actually riding with a little more confidence knowing my bike is not going to stall, spit, sneeze or cough. Thank you again for helping me with the installation.”
- J.F., sent via Email
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Testimonial Received: 09/15/2011
“I just wanted to thank Randy Dull and everyone else at Zipper’s and ThunderMax® for the great CUSTOMER SERVICE. Thank You Very Much!"
- K.W., sent via Facebook
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Testimonial Received: 09/05/2011
“This is the best! No more dyno BS... The tuner at my dealership was impressed. He had never worked with one before - always other tuners. Go figure.”
- K.A., Canada
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Testimonial Received: 08/31/2011
“The folks at Zipper's are super helpful! Keep up the good work!"
- B.B., sent via Facebook
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ThunderMax® Testimonial Received: 08/18/2011
“I want to thank you for the best customer service and finest technical and performance work on my 2006 Ultra Classic.
When I picked up my bike last month, you said the bike should run 100% better now that the injectors were changed from 8 to 25 degrees and new mapping was downloaded to my AutoTune. You were close… The bike performs 1000% better than it did when it 1st rolled out of the dealership!!!
Thanks a million for giving my bike NEW LIFE!
I overheard some of the guys talking about how poorly their bikes run. I told them to take the bikes and have a ThunderMax® installed. They'll do more riding and less complaining!
Thanks again, you guys are the greatest!”
P.T. – USA
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ThunderMax® Testimonial Received: 08/09/2011
“Fantastic system! You helped us set up a fantastic bike with 50mm throttle body, two into one ceramic coated exhaust, and the ThunderMax® closed loop system. The bike motor was completely rebuilt and now it’s a roaring 103 cubic inch monster! The bike cranks on the second turn of the starter! The power is amazing! I can't take it over three grand till it’s broken in, but I can't wait till I can really open up the bike. Thank you for your amazing ThunderMax® system.”
C.S. – FL
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ThunderMax® Testimonial Received: 07/28/2011
“Just wanted to say that the ThunderMax® with Auto Tune I installed last week is AWESOME! Was better than factory from the first 100 yards and continues to improve. The ThunderMax® is working better than expected - MUCH better than expected! My bike runs like it’s on fire!“
M.W. – USA
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ThunderMax® Testimonial Received: 07/24/2011
“I read the instructions for the install of the ThunderMax® with AutoTune on Friday night and did the install Saturday. Needless to say, the most time consumed was in removing the rear cylinder exhaust and relocating the o2 sensor bung. I wrapped everything up according to the instructions, and added some extra wire ties, then took the bike for a test ride.
Throughout the rpm range, the bike started and ran like a different machine. I feel like this was one of the better upgrades that I have done to my bike. Local speed limits and their enforcing agents kept me from really testing the bike very far beyond the "posted" speed limit. It hits the 6 grand numbers a lot quicker now. The wife and I took a short 100 mile ride this morning (Sunday) and the bike ran and performed flawlessly. Thanks again for your help!“
P.K. – Sent via Email
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ThunderMax® for Throttle-by-Wire Testimonial Received: 07/20/2011
“I have a 2008 FLHX. My cousin got a ThunderMax® for his '07 FLHR with 577 Red Shift cams. His bike ran unbelievable! So, I put the same 577 cams in with another tuner... 3 dyno runs later, he's still faster. Then I put my new ThunderMax® for throttle-by-wire in… are you f'ing kidding me? NO COMPARISON! At least 20% improvement and NO THROTTLE LAG!! Thank you Zipper's! I wish I could have got one sooner!”
“Art” – IL
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ThunderMax® Testimonial Received: 07/19/2011
“I installed ThunderMax® with Auto Tune on my new V-Rod, today. It works perfectly! No more piggyback controller issues. Thanks guys."
M.S. – Sent via Facebook
http://www.facebook.com/pages/ThunderMax-EFI
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ThunderMax® Throttle by Wire Testimonial Received: 07/16/2011
“I had originally purchased the ThunderMax® TBW kit from Zipper’s for my ‘09 Street Glide. I liked the idea of not piggy-backing to the OE system, but replacing the OE system. The tune-ability of the ThunderMax® when mechanically upgrading the bike was a big selling point. Then, I traded my ‘09 in for an ‘11 Road Glide and was able to just install the kit onto it, along with my Thunder Header and heavy breather air filter. The bike ran good but wanted more, so I found an upgrade, installed and found the bike runs even better and smoother.
This is THE BEST setup out there! ThunderMax® keeps getting better and Zipper’s is truly committed to the guys and girls who use their product - which is rare these days. Keep the updates coming and keep up the good work. I would never consider using any other module, EVER! Thank You for a great product”
P.R. – CN
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ThunderMax® Testimonial Received: 07/09/2011
“Easy install! I had the ThunderMax® preset from the factory for my bike. WOW! Big difference! Engine ran smoother right out of the gate. Throttle response was a lot better. Engine ran cooler. I rode about 350 miles to Gettysburg where ThunderMax® was set up for the Gettysburg Rally. They were glad to plug it in, run updates, and adjust the fuel on deceleration. I rode back home without a hitch. Great people to deal with and thanks everyone at ThunderMax®!”
W.S. – WV
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ThunderMax® Testimonial Received: 07/01/2011
“My 2008 Harley FXDF with Cobra AC and SE Slip-Ons running the ThunderMax® with Auto Tune is a completely different bike. The more miles I put on it, the better it runs. I can't believe the difference. I look forward to installing new cams and Thunder Headers with the dry nitrous setup. Oh boy!”
K.H. – MA
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ThunderMax® Testimonial Received: 06/26/2011
“ThunderMax® is the best product that I have spent money on in a long time. I rate the product on a scale of 1-10, 10, being the best! My bike starts very quickly, idles very good, runs outstanding - nothing can be compared to it.
The Power Commander I had was a waste of money, right along with all the money I spent on dyno tuning it. Having said all this, I will recommend your product to everyone I know. I did my own install, including the o2 sensor bung install. Less than an hour of install time and your riding! Keep up all the great work!”
A.H. - DE
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ThunderMax® Testimonial Received: 06/23/2011
“You guys rock!! The other tuner on my bike lost its programing twice - so that was a $297.00 dyno trip each time. I just put my ThunderMax® in with a total rebuild – 88” to 103”! I just hope I don’t die from pleasure when I crank the throttle open!"
C.S. – Sent via Facebook
http://www.facebook.com/pages/ThunderMax-EFI/161677050519889
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ThunderMax® Testimonial Received: 06/20/2011
“I just wanted to say thanks to all the people who make your product available. As advertised, the ThunderMax® and 60mm intake with hi-flow injectors did the trick for my Jims 131 with the D&D Boarzilla.
I purchased the Jims 131 in January 2008, one of the first ones they shipped. I've been through 3 transmission main shafts, all bent by vicious starter kickback after hot soak due to too much timing. My local tuners could never get rid of it. My performance was lacking.
The ThunderMax® is unbelievable! It has great hot soak re-start, extreme power through all the throttle ranges and last but not least, that serious kick in the pants at full throttle the Zippers 60mm intake gives me over my S.E. 58mm. Also, my stalling problems are cured and my bike is running cooler. The oil cooler temp dropped from 230 to 210 degrees.
As advertised, ThunderMax® is unbelievable and worth every penny. The headaches over the last 3 years and thousands of dollars I've spent have come to an end. Thanks to everyone at Zippers!!
P.S. Love that closed loop!”
P.W. – Sent via Email
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ThunderMax® Throttle-by-Wire Testimonial Received: 06/12/2011
“Much better throttle response right out of the box!”
C.W. - WY
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ThunderMax® Testimonial Received: 05/25/2011
“After mapping of the factory ECM screwed up time and time again by 'factory trained' technicians and I was still not satisfied, I read the ThunderMax® advertisement in a magazine and decided to give it a try. Of course, I was also looking to change my factory exhaust system with a 2 - 2 system. Upon conversing with the Rep, he recommended a Khrome Werks cross-under exhaust system.
After reading and re-reading the instructions, I installed the exhaust system and ThunderMax® with no problems. I was a little concerned when it came to hooking up a computer and tuning the ThunderMax®, but as I read the instructions line by line it all fell into place. I mapped the ThunderMax® to my bike easily. The next morning I took the bike out for a ride of 30 miles and I found that the bike pulled strong & hard. While decelerating, there was no popping or sputtering. I am IMPRESSED! Thank you so much for your ThunderMax® product.”
A.Q. – OR
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ThunderMax® Throttle-by-Wire Testimonial Received: 05/15/2011
“My bike runs awesome!”
M.D. – RI
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ThunderMax® Testimonial Received: 05/14/2011
“Well, once again, the ThunderMax® tech and sales come through again! I went for a little peek and tweak. The bike’s performance seems to been kicked up a notch. AWSOME!"
J.W. – Received via Facebook
http://www.facebook.com/pages/ThunderMax-EFI/161677050519889
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ThunderMax® Throttle-By-Wire Testimonial Received: 05/05/2011
“I just want to tell you the ThunderMax® installed with the greatest of ease and has worked flawlessly. I rode my 09 Road Glide from the Black Hills of South Dakota in September to the Drag Specialties dealer ride in the Adirondack region of New York for their annual dealer ride. Our trip continued from their thru Canada across the UP of Michigan and back. The trip summed up was 5000 miles in 10 days all sorts of weather conditions from rain and 30 degrees to hot and 80 degrees and zero issues. I think you have a great product and keep up the good work.”
Black Hills Harley-Davidson®
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ThunderMax® Testimonial Received: 05/04/2011
“With the ThunderMax® my bike now seems to start better and runs smoother throughout the whole rpm range with ample power. It will be interesting to see how it runs as the system continues to refine the map over time and in all of the conditions I throw at it. One very happy customer and very impressed with ThunderMax® support and service! Thanks heaps.”
J.N. – Sent via Emai
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ThunderMax® Testimonial Received: 05/03/2011
“I own a 2002 Electra Glide Ultra with a 96” engine, cams, ported heads, after market exhaust, SE intake and air breather. Needless to say, I have given it to the dyno gods ‘till it hurt!
While on a trip to Kentucky, I visited a friend at Mad City Motor Works and I purchased the ThunderMax® setup. I had it sent to my home in Wyoming, where I had already downloaded the program info. I welded in the bungs, put the system onboard, loaded the program and the magic began.
I took a 2300 mile trip, got 5 miles to a gallon better fuel mileage, and a minimum of 10% increase in performance. The motorcycle started easy every time I started it. The conditions were from 3,000 to 10,000 feet altitude, in rain, snow, wind (try riding in Wyoming, Utah and Arizona in April). My experience was nothing but the best. The best part I have ever put on my Harley!! EVER!!
I did call TMax with a question on bung locations, and they were great to deal with. An honest to goodness great experience!”
L.P. - WY
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ThunderMax® Testimonial Received: 04/29/2011
“Wow! Bike is flawless! Unbelievable power!”
M.F. – USA
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ThunderMax® Testimonial Received: 04/25/2011
“I just got back from my test run. Before the transformation, I would have to downshift into 5th gear to pass anyone. Now, in 6th gear, at 65 MPH behind a car, I can do 90 before passing the car. WOW! What a difference. I think my bike was asleep before. Now, she is AWAKE! Wonderful! Great sound and performance!”
D.H. – TX
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ThunderMax® Testimonial Received: 04/23/2011
“I was skeptical at first. I did a lot of research and decided I wanted to do all of my own work on my new toy. I am more than 100% satisfied. My buddy kept bugging me to go for a ride and I knew all he wanted to do was line ‘em up. My little stock 96' walked away from his 103' with a different EFI tuner!
I wanted a RELIABLE, strong running bike and that's exactly what I've got. Thanks ThunderMax®! Great product!”
Brad – MI
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ThunderMax® Testimonial Received: 04/22/2011
“I have a ThunderMax® on a Sportster Forty Eight. It idles perfectly, runs way cooler, and the throttle feels more responsive all the way through. This is only after one day! Getting better every mile I ride. I can’t wait to start tinkering a bit. All I can say is, I am impressed"
C.R. – Sent via Facebook
http://www.facebook.com/pages/ThunderMax-EFI/161677050519889
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ThunderMax® Testimonial Received: 04/19/2011
“I installed a ThunderMax® on my 2007 Harley-Davidson® Nightrain®. My engine is running much better than before and I reduced the idle RPM to 700 rpm. Now the engine isn't getting hot like before. For me, the ThunderMax® is a great product. Keep on rolling.”
Rob via Email
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ThunderMax® Testimonial Received: 04/19/2011
"I, too, am running a ThunderMax® on my '08 FXSTC. Stock 96” with Krome Works Slash Cut slip-ons and a Big Sucker Stage-I intake… More Power is just a twist of the throttle away! It runs cooler with more power and I still get 42+ MPG."
J.J. – Sent via Facebook
http://www.facebook.com/pages/ThunderMax-EFI/161677050519889
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ThunderMax® Throttle-by-Wire Testimonial Received: 04/19/2011
“I know it’s hard to believe. We took a 2500 mile road trip and with the pack at 65 mph. I was getting 61 miles per gallon on my 2009 Road King Police with the 103" and when I wanted the power, all I need to do is roll on the throttle and leave the other tuned bikes behind. I Love my ThunderMax®!”
M.S. – Sent via Facebook
http://www.facebook.com/pages/ThunderMax-EFI/161677050519889
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ThunderMax® Testimonial Received: 04/19/2011
"This has to be the absolute best fuel control and management computer system on the market. I am running a 106" Stroker (recently custom built) with mostly S&S internals (with few exceptions), V&H 2 into 1 and I get relatively close to stock gas mileage (somewhere between 32-35 MPG). You just can't beat the performance and fuel economy with anything else, not to mention it makes that 106" Stroker purr! Awesome product! Keep up the good work!"
P.R. – Sent via Facebook
http://www.facebook.com/pages/ThunderMax-EFI/161677050519889
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ThunderMax® Testimonial Received: 04/19/2011
“I love my ThunderMax® on my 2008 FXSTC. Stock 96, Python Venom Radius 2:2 AN Big sucker. Lots of power (I run out of nuts before the ThunderMax® will!) and great fuel mileage. No popping! Excellent product and excellent support, next day email responses. It's all good. Thanks ThunderMax®! Great product!
Next request is to be able to program the weather with the AutoTune, of course!"
J.I. – Sent via Facebook
http://www.facebook.com/pages/ThunderMax-EFI/161677050519889
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ThunderMax® Testimonial Received: 04/10/2011
“I put a 95" kit in my Ultra® for the extra power on the highway. I had two different systems installed on this bike before and they didn’t get it tuned right. I'm far from being a computer whiz, but thanks to ThunderMax®, this runs great! Thanks ThunderMax®!”
KD - AL
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ThunderMax throttle-by-Wire Testimonial Received: 04/07/2011
“After installing the ThunderMax TBW on my bike, this is new experience for me! There is no sign of exhaust deposit on the exhaust. The bike runs faster, cooler and the acceleration is unbelievable without reducing the fuel economy. Never had this kind of experience with other ECM/Module brands that I had before. Your product is the best for Baggers. Keep up the good work!”
J.P. - Jakarta, Indonesia
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ThunderMax Testimonial Received: 04/05/2011
“Installation was easy and I have no more heat issues, pulls hard in all gears at any speed, well worth the money to get the bike to run like it should!”
J.A. - MN
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ThunderMax Testimonial Received: 04/05/2011
“I just wanted to let you know that the product works great. I had a Stage IV 103 kit installed on my Electra Glide® with a 259e cam instead of the 260 and the Screamin’ Eagle® Race Tuner® and the dealer dyno’d the bike. I got to Daytona and the bike was spitting and popping. I rode it for three days then bought a THUNDERMAX. They installed it for me. My first time out the bike was 100% better and keeps on getting better. I will recommend ThunderMax to everyone. Again, thanks!”
B.T – Received by Email
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ThunderMax Throttle-by-Wire Testimonial Received: 03/20/2011
“My ‘08 FLHP has a 103ci engine. It came with a stock air cleaner, and stock pipes. GEEZ! TMAX TBW woke up the beast!!!! Now, I can change every thing else and the best ‘Riding is tuning, tuning means Riding.’ Wow!!!”
M.N. - KY
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ThunderMax Throttle-by-Wire Testimonial Received: 03/29/2011
“After a trip to the mountains with my friend KD and his stock 96”, I knew I had to get my 103” running right. After many trials and errors with another famed "tuner" and many questionable dyno runs, I finally bought the ThunderMax. What a difference! The idle is better, throttle response is quicker and crisper, the revs are faster, and the torque is stronger! Better yet, no more trips to a dealer, no more appointments, no more heartache! Just ride, smile, and let AutoTune do the work!! THANK YOU ZIPPERS THUNDERMAX!!”
R.K. - SC
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ThunderMax Testimonial Received: 03/19/2011
“After a new 104" build with heads, cams, pistons, jugs, intake and exhaust, I was really depending on my ThunderMax to pull it all together. I contacted Zippers and advised them of my combination of parts and they recommended a base map. (Of course there is always some anxiety attached to the first time you fire up a new build.) WOW!!
Zippers really came through with the ThunderMax. It fired up on the first try and after heat-cycling, the unit did everything it was supposed to. I've now got 300 miles on it (divided by 4 short rides).
The TMax has learned new fuel off-sets each ride and just keeps getting better. I've experienced significantly improved throttle response, fuel mileage and exceptional overall performance. The TMax exceeded all my expectations and is truly unbelievable.
I will definitely be promoting (bragging) about the technology and quality. Best component of my build - bar none - and the easiest to install. Thanks Zippers and the techies at ThunderMax... Well done!!”
R.D. - Canada
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ThunderMax Testimonial Received: 03/18/2011
“I installed the ThunderMax on my 2005 Touring H-D. The engine is 95” with 510 S&S cams, bored out throttle body and 10.5 compression. After running without the ThunderMax for 6 months, I welded in exhaust bungs and added TMax with AutoTune... My bike runs excellent and starts instantly! Mileage is up to 47mpg. Great product! So easy, a cave man can do it!”
V.K. – WI
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ThunderMax Testimonial Received: 03/17/2011
“Bored and worked the engine, heads, valves, cams, high compression, pipes, etc. Power Commander® did not "cut it"! Lags and low power problems were completely corrected when I switched to the ThunderMax. Have 50K+ on the bike and it performs equally well regardless of temperature, elevation, and all other power robbing variables. I would definitely recommend this for anyone who appreciates performance when they ride.
Quick note on ThunderMax support: I stopped by their tent in Sturgis 2010 and they could not have done more to make sure that all was well with the bike. Rode in from NJ (1800 miles of highway touring) and it was all GOOD! Thanks guys!”
G.W. - NJ
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ThunderMax Testimonial Received: 03/17/2011
“ThunderMax is a high quality part! Easy instructions! Installed it myself!”
G.E. - MD
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ThunderMax Throttle-by-Wire Testimonial Received: 03/08/2011
“The return trip from Daytona last year was like riding a different bike. Amazing! 500+ miles and I smiled the entire trip. Before I had a Race Tuner®, the bike had been Dyno'ed 2 times and still did not run as it should with my other modifications. The ThunderMax took care of her ill's and now she runs like she should. THANKS!!! See you all at Biketoberfest 2011!”
R.H. - SC
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ThunderMax Testimonial Received: 03/05/2011
“This product is the real deal! I installed the ThunderMax on my ‘06 Road King® with 2 into 1 D&D pipes and a high flow intake. I have seen very good results! More torque! More horse power! The ThunderMax learns as you ride and the software is self-explanatory. I’m on my third map. I am very happy with the ThunderMax and the tech support!”
J.M. – NJ
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ThunderMax Testimonial Received: 03/04/2011
“I had a Magnetti-Marrelli system that never quite ran right until I had ThunderMax with Auto Tune installed. My bike has never run better. I have since changed the exhaust and the system adjusted itself perfectly.”
R.S. - WI
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ThunderMax Testimonial Received: 03/04/2011
“My Road King® was among the first fuel injection MM systems. The bike almost immediately went to the dogs, to the point where I thought of tipping her onto the rubbish. In the end, the issue was none other than a blocked fuel breather. Nothing more than bad luck and timing. In between, I replaced all the sensors, crank, cam, air temp, manifold seals and then finally in one last throw of the dice the M&M EFI with the ThunderMax w/AutoTune replacement.
In Melbourne, our peak temps vary from summer 50C to minus 5c in winter. With the ThunderMax, that bike idles on 115F days, drinks less fuel and is objectively more responsive than she's ever been. My enthusiasm is once again the same as when I first scored her from virtually new. The ThunderMax is expensive - but only for the first few minutes until you get them installed (which I did myself). And the best part, I'll never wheel my bike into another Harley dealer. With a lick of paint, plus a new Mustang solo seat, I now have a 21st century Harley®. Would I recommend one? Absolutely! Great product!”
M.J. - Australia
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ThunderMax Testimonial Received: 03/04/2011
“The ThunderMax Closed-Loop System gave me a "new bike"! I was running a different aftermarket tuner at first and it didn’t work. My friend has the ThunderMax on his bike, too. I told him what to do. He is also satisfied. My bike is an ’07 Softail® Deluxe®”
K.S. - Sweden
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ThunderMax Testimonial Received: 03/03/2011
“I purchased the ThunderMax 30 days prior to picking up my new 07 FLHTC®. After the initial break in, 50 miles, I pulled the stock module and replaced it with the ThunderMax and I have never looked back. Any mods can be done with the full reliability of the ThunderMax and tech, Randy, when I had questions.
I have done mods from Zipper’s cams to exhaust, and can change timing anytime I want. I added a little advance cause of the elevation that I live at. It's as easy as linking to my lap top, pull up the page and move the squares to the desired location. I recently changed my transmission sprocket from a 32 tooth to a 30 tooth and the MPH and 6th gear indicator light was easy to recalibrate.
If you consider all the times one would spend and the money at your local dealer or dyno shop to do these adjustments, it would have bought 2 to 3 ThunderMax’s and still be at their mercy for your next mod. It's easy to make corrections to fuel, timing, gear change, tire size etc. I'm a very convinced and a happy user of the ThunderMax.”
T.L. - NV
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ThunderMax Throttle-by-Wire Testimonial Received: 03/03/2011
“Last year I installed, Vance & Hines slip on mufflers and Zipper’s Max Flow intake, and set my ThunderMax to the recommended specs. My 2009 Street Glide® ran perfect.
This year, I dumped the stock pipes and installed Vance & Hines® Power True Duals and reprogrammed the ThunderMax for the new pipes. Again, the bike runs perfect! No backfiring when letting off the throttle and in any temperature and altitude, the bike recalibrates and continues to run perfect!
The folks at Zippers were there whenever I needed them and all I can say to my riding brothers: Cut the chase! Purchase the ThunderMax module and relax! Your bike never ran this good! Thanks to all the fine people at Zipper’s.”
K.D. - MI
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ThunderMax Testimonial Received: 03/03/2011
“The bike now starts up cold or hot without excessive cranking! The gas mileage is way up! I'm getting about 50 mpg on I-75! The bike runs stronger, idles at a more normal 832 - it even sounds like an old Harley® now! Sounds better and overall runs like it should have from the factory. I added a stage one upgrade (pipes and intake) and the ThunderMax.
The ThunderMax was easy to use in terms of tweaking the advance and A/F curves. My humble advice - just read, re-read and study the Zipper's user's manual. Follow it to the letter. It gets easier the more you tweak. I only get occasional engine pop/afterfire and that is to be expected under aggressive acceleration. The factory ECM just ran far too lean and the bike was really hard to re-start when it was hot.
All in all, T-Max is the best of the true aftermarket ECM replacement. Bar none. I've been working with EFI and aftermarket ECMs for almost 20 years now and the T-Max is a well thought out piece of hardware with a very good and functional software front end.”
D.P. - FL
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ThunderMax Testimonial Received: 03/03/2011
“I purchased my ‘08 Street Glide® in September 2010. It had Rinehart True Duals and H-D® high flow air filter already installed. The first thing I noticed about how the bike ran was the off idle stumble. Not only was it annoying, but I also considered it a safety hazard. I would have to anticipate this and adjust my riding when leaving from a stop. One other thing is that at about 2800 rpm's, the bike would hit a "power band" and take off, again annoying!
I installed the ThunderMax in mid December 2010. The first thing I noticed was how the bike ran much smoother, cruising and running it up through the gears. No more off idle stumble! I have been running it in the AutoTune mode and have updated the map a couple of times. I look for any excuse to get on the bike and ride! I love the way it runs now.
I have a buddy that has an '11 103” Street Glide® with SE tuner and V&H pipes. I can out run him. He is not happy about that! I am very happy about it! Why can't Harley® make them run this way from the factory? Thanks for a great product!“
B.P. - AZ
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ThunderMax Testimonial Received: 03/03/2011
“The first thing I did with my new Harley® was exhaust, air cleaner and ThunderMax .On my Rocker®, I had to remove my rear fender to get to my ECM (not as easy as other models) I had to modify the way it mounts, but thanks to the pigtail Zipper’s offers, it makes it simple to route to a place of connection. The ease of set up and use is great. Once I racked up some miles on the base map, I used the AutoMap feature. My bike just keeps running better and learning and learning!!! Awesome!”
J.C. - MD
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ThunderMax Testimonial Received: 03/03/2011
“I had the ThunderMax installed to try and get the motor running cooler, not only did this happen but the whole bike transformed into a different machine. I have a smooth running engine that runs cooler and offers more performance. I have spent thousands on my bike customizing it, but the ThunderMax with AutoTune is by far the best addition to my bike - even though you can't see it. Thanks to Randy, James and the team at Zipper’s for looking after me and my Dyna® Fat Bob®.”
S.D. – FL
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ThunderMax Testimonial Received: 03/01/2011
“Thank you so much for making a product that works as well as advertised. Your products completely solved my fuel injection problems. You gave me a bike that was fit to ride again! Thank you SO much!”
D.E. - IN
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ThunderMax Throttle-by-Wire Testimonial Received: 2/12/2011
“This is my second ThunderMax with AutoTune. I had one on my ‘07 Heritage which replaced the other aftermarket tuner on it. This is totally unbelievable! It made a different bike out of it… more power, ran cooler! So, when I bought my 2011 Street Glide, I wouldn’t pick it up from the dealership until they installed a ThunderMax with AutoTune on it. I highly recommend this product. You won’t find a better system. Awesome”
“Mark” - AL
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ThunderMax Throttle-by-Wire Testimonial Received: 02/04/2011
“The first ride on my new FLHTCU was up around Lake Tahoe and I soon found out that my bike had a major problem. She started running so hot that it went into limp mode by turning off the rear cylinder. I took the bike back to the dealer and told them what happened. They told me that the bike wasn't getting enough fuel at that altitude but the other bike my wife was riding ran like a top.
Feeling like I got screwed I went online and looked for a way to take care of the problem myself and Thunder Max was at the top of the list. Now instead of running over 290 degrees, she now runs around 230. I can't tell you how happy I am with your product. Customer support is over the top. You even called me just to see if everything was OK. I will make it a point to mention your product in every conversation about my bike.”
B.H. - NV
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ThunderMax Throttle-by-Wire Testimonial Received: 01/24/2011
“I am with the Sheriff’s office. I have been out run by cars and other bikes. The radio always catches them, but it is a slap in the face to have a Mustang or Charger walk away from my Police Road King with the 103 on it. After we put the TMax on my bike, I can pull my front wheel of the ground coming out of 4th gear. My top speed was around 115. Last week I chassed down a Camaro and hit 132 mph. The bike has never been more comfortable to ride. The heat is gone, baby, the heat is gone!!! I have recommended this to all the riders on the force.”
“Michael” - TX
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ThunderMax Testimonial Received: 12/30/2010
“I installed the ThunderMax 2 weeks ago and all I can say is O.M.G.! After riding my bike with the factory computer for over a year and having backfire problems, I am SOOOO happy to have your product in my bike!!! It has never run this well! Thanks!”
“Charlie” - TX
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ThunderMax Testimonial Received: 12/26/2010
“The second unit you sent has arrived on Christmas Day (not a working day here) so fitted last night and did the riding this morning.
Within 2 hours of starting up this morning, I was riding a completely different bike: no decel popping, nice even idle and smoother through the range. I guess you hear that kind of thing a lot but for me it's a miracle! Six weeks ago (when I heard about you guys) I was ready to pull the engine apart and start over, having decided it would be the only way to get the bike running right. Thanks is not really enough, worth the wait and best Christmas present I've ever bought myself.
If you hadn't guessed I'm pretty happy right now...Bloody Marvelous!”
K.A. - SA
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ThunderMax Testimonial Received: 12/21/2010
“The only thing I can say is WOW! The ThunderMax w/ AutoTune has made my bike riding experience take a quantum leap. The bike handles like a dream and has lots of power and zoom. I would recommend it to anybody that wants to get maximum power out of their bike. ThunderMax made the bike purr... “
D.C. - VA
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ThunderMax Throttle-by-Wire Testimonial Received 11/23/2010
“All I can say is “WOW!” This product was exactly what I thought it would be and then some. My bike went from burning my right leg, to just a joy to ride.
Before ThunderMax, I didn’t want to ride unless it was all highway riding, around town was just to uncomfortable for me. I have used other tuners, and spent a lot of money, which failed in time.
Now, with the ThunderMax TBW, I can’t get enough saddle time! My bike starts very fast on cold starts, idles perfect and I get a crisper throttle response with more torque. Best of all, no more heat issues! I am going to buy one for my wife’s Street Glide.
You guys hit a home run on this one! Your customer service is outstanding and second to none! Keep up the great work and I will highly recommend your product. I wish I would have bought one sooner! Thanks again, ThunderMax.”
R.S. - USA
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ThunderMax Industry Testimonial Received: 11/20/2010
“This is the kind of response I had hoped for when I first began to research the ThunderMax back in 2007. You and the rest of the crew have been an instrumental part in the growth of my business. I thank you for your continued help, encouragement, and patience with me. You have provided me with a wealth of education over the past few years and no one can ever take that away. There is no substitute for experience. Zippers will continue to be our first choice for go fast products. Thank you for being genuine good hearted folks in an industry of sometimes less scrupulous personalities.”
T.B. – Discount Motorcycle
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ThunderMax Testimonial Received: 11/20/2010
“The ThunderMax made an incredible change from the “git-go”. The most annoying issues I had were resolved immediately – engine temperature dropped 20 degrees and the bike starts perfectly … hot or cold .. no more cranking and cranking! I could tell the performance difference also, though it is more subtle, but when you really get it on … You can feel the difference in the seat-of-the-pants. Positive results were gained in other areas (temp, starting ease, throttle response and smooth acceleration run-up).
I left a great and well-earned rating on Google’s page … and left very positive feedback with Zipper’s … and if you need any kind of referral letter or customer feedback … let me know … it’s the least I can do and I wish I could do more …”
C.P. – via email
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ThunderMax Testimonial Received: 11/13/2010
“Have you ever lift the front tire on a 1-2 shift with a stock engine and stock mufflers? If you have, you have ThunderMax. ThunderMax has improved the performance of my bike better than anything I have ever tried. I have been a auto technician all my life and never experienced any single one thing that made such a difference. I picked up 10 mph and 1000-1500 rpms. ThunderMax is the best. Thank you for everything you guys do!!!”
D.G. - PA
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ThunderMax Testimonial Received: 11/05/2010
I love my bike again!
Even though it is stock, I was having issues with the MM module. I was looking at my replacement/repair options when I found references to ThunderMax. After pushing Google to its limits researching your products and reading what other people had to say, I decided that was the way I would go.
I did the install myself. It was fairly simple and straight forward. After the install, my wife and I took off on a 350 mile shake out run with some friends.
Elevation changes were from 6000 feet to a little over 10000 feet and speed was varied from 40 MPH to 85 MPH (the latter was on a valley stretch with a 40+ MPH cross wind). First tank of fuel was 45 MPG and over all was 41 MPG (higher speed and a hard crosswind). Before TMax, I was in the mid 20's for MPG, idle was a little erratic, and the bike ran rich most of the time but, at other times, showed signs of running lean. Now I see a consistent and improving MPG, smoother idle, smoother acceleration and the adaptation to changes in altitude while riding.
I really like the ability to plug in the PC to monitor and review what is going on, and change the map to increase efficiency. I expect that by next summer I will be pushing 50 MPG if not better, not bad for a fully dressed Road King.
I haven't yet had the pleasure of dealing with your service department, and by the looks of it I may not have to. Of course, my set up is basic and straight forward.
Thank you for the MM conversion product! If you are ever out in Colorado feel free to give me a shout. If you want to do some higher altitude testing, I know a few places to go.
E.P. - CO
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ThunderMax Testimonial Received: 10/29/2010
Great, great product!! The ThunderMax is everything you said it would be! It made my bike run like it is meant to run! I can't believe how much smother it runs!
J.C. – TN
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ThunderMax Testimonial Received: 10/27/2010
I had my ThunderMax installed during Biketoberfest this year. Absolutely Awesome! I am very pleased with the service I received and the product. I could almost immediately tell a difference during the miles we rode after the install around Daytona. The 540 mile ride home was like riding a different (better) bike. Thanks!!!
R.K. – SC
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ThunderMax Testimonial Received: 10/26/2010
The ThunderMax is an amazing ECM. The bike is just an entirely different bike. The bike has great power and acceleration, runs smoothly, keeps cooler, and has better throttle response. Everything that was said about the ThunderMax is true! I am one fully satisfied customer! The fact that you can check and tune at home is one huge plus.
P.P. – Chile
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ThunderMax Testimonial Received: 10/19/2010
The base map I choose was real close for my set up. I have done two auto map updates since installing the ThunderMax with AutoTune. On the first one, there were only three points over 10% off, and nothing over 15%. On the second one, there was nothing over 10% off, with most adjustments at less than 5%. The bike runs much better than stock. The ThunderMax lets me get the most out of my engine with my intake and exhaust upgrades. I've dropped my head temperature by 40 degrees. I can pull 6th gear at 45mph. The ThunderMax is definitely worth every penny. The power, response and improved ride-ability make my bike a joy to ride. Thank you for putting out a great product and making it easy to use!
J.H. – MI
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ThunderMax Throttle-By-Wire Testimonial Received: 10/11/2010
I purchased the ThunderMax because I had to rebuild my entire engine (2009 FLHTC) into a mismatch “Frankenstein” motor. I ended up with S&S 106” Big Bore ported and polished heads, S.E. 260 cams and a stock throttle body with stock injectors. A dyno tune with another aftermarket device left the bike with a lot of HP, but some ride-ability issues. It had a huge flat spot at 2800 RPM that would almost launch you off the bike when you passed through it. Not really a lot of fun to ride!
After many hours of frustration, I decided to purchase the ThunderMax. Needless to say, I wish I had done this in the first place! The bike rides better than it ever! It pulls strong from idle all the way to 6400 rpm. It is a much more ride-able bike than it was before. If this tuner can make the mismatch of parts I have run this good, I’m pretty sure it can work wonders on anything!!!
W.H. - IL
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ThunderMax Testimonial Received: 10/10/2010
I love your products! When people check my bike out, I show them all the Zipper’s Products installed on it. This is the best my bike has ever run and I swear by Zipper’s Performance. Thanks and take care!
F.W. - AU
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ThunderMax Throttle-By-Wire Testimonial Received: 10/09/2010
I ordered the ThunderMax TBW and waited for it to come in. In that time, my new pipes and other upgrades came in before the ThunderMax. Not having any patience, I installed the upgrades and kept the stock ECM. The operation of the motor was lean. When the ThunderMax came in, I installed it myself.
What a difference! I went to the mountains and my friend, who has a 103 setup, was impressed when I out ran him - not once but twice with a 96 incher with stock cams! Sitting there in disgust I told him to go buy a ThunderMax and that would solve his problems. Great product and thanks!
K.D. - SC
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ThunderMax Testimonial Received: 10/09/2010
I was so impressed with the ease of installing the ThunderMax that I wrote a technical article on it and put it on Bikernet, Bikers Inner Circle and my own web site. I have ridden the motorcycle around the country covering motorcycle events and it has run well, changing itself to conditions. I continue to tell people how well it works and suggest they use one. I say: I can have any ECM I want on my motorcycle and I chose ThunderMax. What does that tell you?
Rogue - FL
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ThunderMax Testimonial Received: 10/08/2010
Overall, the ThunderMax is great for us here in the North of Australia. We are 300 miles away from North, South and West Australia, so we have completely different weather and road conditions. The self-learning tune works great. The customer and my self love that fact that the bike stays in tune where ever you are! Great Product!
Leeroy, Townsville Custom Cycles - AU
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ThunderMax Testimonial Received: 10/08/2010
I have told numerous new and old bike purchasers that if they only buy 1 accessory, the ThunderMax has to be it! It shouldn't really even be termed an accessory but, rather, a necessity. Every time I hit the starter, I'm reminded how great a purchase I've made. The ThunderMax is definitely a "must have "!!!
R.K. - USA
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ThunderMax Testimonial Received: 10/07/2010
What a difference this product makes! Awesome performance!!!! I can not believe the throttle response! The guys at Eastern Performance did a great job installing this along with complete Vance & Hines Monster Ovals exhaust, and Stage1 air box. What a great combination. Can't wait to do the cams next!
B.P. - MD
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ThunderMax Testimonial Received: 10/06/2010
It seems to me that the ThunderMax greatly smoothes out the fuel injection on Harleys®. The bike runs great and all the hesitation is gone. Thank You!
J.W. - GA
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ThunderMax Testimonial Received: 10/03/2010
Bike runs much smoother on very first run. Good product.
J.H. - MI
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ThunderMax Testimonial Received: 09/27/2010
The whole concept and performance of the ThunderMax with the AutoTune is so beyond everything else that I am excited for y’all. I was fortunate... I hadn't opened my other aftermarket tuning device and still had the receipt. I try to catch everyone as early as possible to show them how they are really only about $100-150 away from the first class setup.
Anyway, I hope all goes well for Zipper's in the future. I will be sending all I can your way.
A.B. - submitted via email
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ThunderMax Throttle-By-Wire Testimonial Received: 09/20/2010
I’ll never get back the first 3500 miles on my new FLH. I had it on the dyno 5 times, three different places, and it still wasn’t right. Also, I tried different baffles and I was ready to put the stock exhaust and air breather back on and take the bike back! I was also concerned about the vacation I was planning to Colorado when I found out a 2010 wouldn't run right at over 10,000 ft.
My first ride was enough to sell me on the ThunderMax TBW. I’m keeping my big radius pipes and I love my bike now!!!
Rick - IN
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ThunderMax Testimonial Received: 09/20/2010
I’m just sending a short note to say nice meeting you. You and the techs treated me great and solved my problem. It was my girlfriend's very first Bike Rally and she was amazed at how nice you guys were!
I absolutely LOVE my bike so much more since I had the 95" Muscle Kit installed at Scalia's Cycles in Fairfax. Your company's overall concern and professionalism towards your customers, confirms that I made the right choice when I chose Zipper's Performance over the other companies that I was considering before I spent my hard earned money on my motor.
Keep up the good work and I'll continue to spread the word to everyone that'll listen.
G.U. - VA
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ThunderMax Testimonial Received: 09/10/2010
I want to express the difference the ThunderMax made to my ride. Seems like the power band is completely linear with absolutely no dips or flat spots. This is something a world apart from what I was used to with the other I had. The ride is now super soft.The power is always there when I want it, and plenty of it! It is as if I had taken my bike to the best dyno tuner and after 8 or 10 dyno runs, I would be told the bike is tuned to perfection.
Amazing! Simply amazing! In all my years of HD riding, I have never ridden a bike that seemed so well tuned, smooth and with lots of power at hand all at the same time! You guys have done it! Thunder Max 'Rocks'!
L.G. – submitted via email
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ThunderMax Testimonial Received: 08/31/2010
I just wanted to send a quick thanks to all the support staff. I had a problem with my ThunderMax that couldn't be resolved via phone and email. I dropped by the tent at Rapid City Harley-Davidson® and the techs fixed my issue in less than 30 minutes. While the ThunderMax is unsurpassed in quality, your staff far exceeds the support I have received from any other company.
C.T. - submitted via email
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ThunderMax Testimonial Received: 08/27/2010
Once again, I applaud Zipper's for excellent customer support. Many times you have looked out, and protected, my investment in your excellent product.
On my recent 3K plus trip in very warm weather, I ran another device while I sent my ThunderMax to tech support for analysis. Temperatures were in the 90's and low 100's and my oil temps got to 260 plus on several occasions. This never happens while I am running the ThunderMax! I am happy to have it back to re-install!!
Thanks so much for all of your help and timely replies.
Tom – submitted via email
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ThunderMax Throttle-By-Wire Testimonial Received: 07/30/2010
I got the ThunderMax TBW for my 2008 FLHTP® with Rinehart® True Duals and K&N® Air Filter. I did the ThunderMax install myself and wrote the base map with no trouble at all. Pete Stewart at Zipper’s Performance gave me a start on the base map and I massaged the parameters. WOW! All kinds of torque and smooth as glass! Midrange power is outrageous, just like a whole new bike! ThunderMax is the only way to go with the AutoTune for bikes with O2's. It's a MUST buy for Harley-Davidsons®!
K.M. - NJ
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ThunderMax Received: 07/28/2010
I recently purchased the ThunderMax ECM from Pat Little. He told me how easy it was to install and have the bike up and running in a short period of time. I, also, installed a set of D&D 2 into 1 headers at the same time. It was everything they said it would be and more. I now have a smoother idle, less heat from the rear cylinder, and much better throttle response. The ThunderMax map from Zipper’s Performance was dead-on. I'm looking forward to a couple more up grades I have planned, and how easy the mapping will be once they're done. Great Product! Thanks!
M.M. - VA
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ThunderMax Received: 07/28/2010
Freedom Cycle in Delaware highly recommended the ThunderMax ECM, over any competitive product including the factory performance map. As such, I agreed to remove the stock ECM and my other aftermarket tuner from my 2001 Softail® Deuce®. When I got back on the bike and headed back to PA, I literally thought it was a different bike!!! UNBELIEVABLE! The throttle response is amazing, the idling is very smooth and my gas mileage improved. The exhaust sound is much richer and sharper. Absolutely well worth the investment and I recommend anyone looking for a vast performance improvement to purchase the ThunderMax. Thanks ThunderMax and Freedom Cycle!!!
B.S. – PA
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ThunderMax Throttle-By-Wire Testimonial Received: 07/19/2010
I got the ThunderMax on Monday and, because of my work time, could not get it installed until Sunday. I am so happy with the ThunderMax EFI AutoTune! It does everything you guys said it would do! The bike runs strong in every gear, 1 thru 6.
I took my bike to the Harley® shop today to get a new rear tire. When the shop foreman road the bike on a test drive, he was so impressed with the difference that he just wanted to keep riding it! Before the ThunderMax, my bike was not picking up on the throttle in 2nd and 3rd, but NOW you can’t hold it back! The bike accelerates quicker, starts better, and runs cooler.
I can’t begin to tell you how great it runs! It is crazy how much of a difference there is in performance! This winter, I am going to go to more cams and port the heads. This bike will climb trees if you want it to! I should have done this a long time ago on other Harleys® I have owned. This was one time this biker got what he paid for. The ThunderMax is a great product!!
Thanks, Pete at Zipper’s, for all your help! Happy riding and be safe, thanks!
G.B. - Ohio
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Testimonial Received: 07/12/2010
I purchased a full Zip Kit for my 2010 CVO Convertible from Zipper's. The sales staff and support staff were very knowledgeable and friendly.
I was pretty happy with the bike before the modifications, but it now performs the way I thought it should with a motor like the 110. It runs much cooler and pulls with authority from the git-go. It took a little over six hours to get everything on the bike (first time I worked on a motorcycle), but the work was not difficult or terribly time consuming. With the directions given for the ThunderMax, even that portion of the install went smoothly.
I've ridden a little over two hundred miles since the install and believe that the bike just keeps getting better. Whether that is me being more comfortable or the AutoTune doing its work, I don't really care. I just know that the bike I now ride is what I was originally looking for in the CVO.
Thanks for everything, guys!
M.W. – Virginia
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Testimonial Received: 07/10/2010
Chris with Cycle Solutions did an awesome job tuning my bike with the ThunderMax! Awesome response, fuel mileage increased and, most importantly, the heat is gone!
J.M. - Iowa
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ThunderMax Throttle-By-Wire Testimonial Received: 07/05/2010
Here is the real scoop - I put the new TBW ThunderMax on my ‘08 Ultra®. The difference is night and day! It was all I expected it to be. The selling factor to me was the fact that my wife's Softail® Springer® with a ThunderMax was putting all of us with the 96” bikes in the dust.
I removed my other aftermarket tuner and put on the ThunderMax myself. Good choice! Now, my wife can not ride off and leave me. The other guys we ride with are looking at tail lights from both of us, even with their other aftermarket tuning devices. A friend accused me of putting a big inch kit on my bike, since I could not run with them when I had the other tuner installed. Now, I run with and pass him!
Thanks guys - keep up the good work. Be looking for some phone calls on more orders as more people find out the real art of performance is ThunderMax!
C.S. – Maryland
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Testimonial Received: 07/02/2010
I am very happy with the ThunderMax I installed on my ‘09 Dyna® Super Glide®. I had installed a 107” kit and Andrews 31 cams. I already had a “piggy-back” tuner installed prior. I had contacted the “piggy-back” tuner tech support and they said that they were unable to help me. Zipper’s Tech Support was more than helpful each time that I contacted them! I have recommended Zipper’s Performance and their products to everyone I know with Harleys®. Once again, Thank You all very much!
D.O. – Alabama
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Testimonial Received: 06/17/2010
I just installed (did it myself) Rinehart® True Duals, Screaming Eagle® Air Cleaner and the ThunderMax with AutoTune. I went for a test ride and noticed a slight decel pop on 3rd gear. Two days later, I went on a long ride with a buddy who has an Electra Glide® and while doing 85 mph, I opened the throttle. The bike jumped forward like it had a second wind, very impressive! I like this product and the best part...no $250 on dyno. The decel pops are gone for good!
“Jose” – Virginia
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Testimonial Received: 06/15/2010
I am very happy with my ThunderMax experience. From purchasing the ThunderMax, to the customer service rep that helped me do a final tune, it has been great!
M.D. - Alabama
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ThunderMax Throttle-By-Wire Testimonial Received: 06/07/2010
I installed the TBW ThunderMax on my ‘08 FLHP, which is a 103" engine with head work, cams and a 2 into 1 exhaust. I told Zippers this info and they sent me my new ECM with a base map that they felt was close, and the AutoTune did the rest. The bike runs FANTASTIC with no need to dyno, just ride it. Installation was fairly simple. Fuel mileage is better, throttle response is better, all in all everything is better!
J.T. – A Famous H-D® Dealer
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Testimonial Received: 05/27/2010
BUY THIS PRODUCT! You will not be sorry. I have it on my 2010 Dyna, and also I have the Nitrous kit and Speedometer. MPG went up by 10! Power is right now, and I can ride along at 45mph in 6th gear without any lugging. You can’t go wrong!
M.F. - USA
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ThunderMax Throttle-By-Wire Testimonial Received: 05/19/2010
I have been frustrated with my 2008 CVO® Ultra® Classic® nearly from day one. It never felt like it was 110 cubic inches. Since the ThunderMax, my bike feels like it has more torque then ever. The power band is smoothed out and the bottom end that caused the need to constantly feather the clutch is gone completely. So far over 600 miles and counting!
R.B. – Washington
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ThunderMax Throttle-By-Wire Testimonial Received: 05/07/2010
I removed my exhaust and installed the D&D Fat Cats - a clean set up eliminating all those brackets for a clean look. I selected the base map, loaded it and followed the instructions. Then I went for a ride… The ThunderMax and Fat Cat combination is great. No popping down hill and between shifts. What a great sound! Acceleration was right on and smooth.
The ThunderMax and D&D exhaust really go well together.
J.Q. – Washington
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ThunderMax Throttle-By-Wire Testimonial – May 05, 2010
I had the ECM install on my 2008 Harley Street Glide 2 weeks ago. When I got on the bike and headed down the highway, I thought I was on another bike!!! It was GREAT!! The biggest thing I noticed was the throttle response and lower idle. Excellent investment! Thanks ThunderMax!!!
T.C. – Ohio
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ThunderMax Throttle-By-Wire Testimonial - April 29, 2010
I stopped by my house on Saturday just to e-mail you and let you know who pleased I am with the map that you and your team put together. When I got a chance to really get on it (ThunderMax) all I kept saying was “WOW! That thing took off like a rocket”.
My bike is night and day from what it was like when I dropped it off to you. My buddy was ridding behind me when I cracked open the throttle. He just shook his head and smiled, and said “Now, that’s how a Harley should sound and perform”. The Cam work almost gives it that good old carburetor sound while idling.
I want to thank you and your team once again for all the hard work you did.
PS. Let me know when I can buy the ThunderMax for my boss.
M.F. – Maryland
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April 29, 2010
I finally have my bike running perfect with the ThunderMax. It is an incredible change from the original HD E.C.M. Now it is fun driving this bike! Thanks, again, for bringing the toy to Mainz. I think the ThunderMax is one of the best innovations for HD improvement in the last years!
R.K. – Germany
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ThunderMax Throttle-By-Wire Testimonial - April 27, 2010
Last week I had you overnight a ThunderMax, so I would have it for my trip from Key West to Leesburg, FL for the Bikefest there… You know, over the years there is one thing I definitely learned about modifying a motorcycle - never do it the day before you leave. I don't know what got into me, but I broke that rule!
The unit worked as it was supposed to on the way up there and while running about the event. Then, on the critical ride home, I came to this conclusion about your product: Not only was I surprised about your client relations work, but the ThunderMax I installed actually worked beyond all my expectations and then some!!!
Clearly, this one of the best choices I've made! Thanks for having such an excellent product and for it working exactly as it was supposed to. The acceleration was perfect, as well as no hesitation. Deceleration was also very smooth. The power has slightly increased but best of all was the fuel management results. ThunderMax is an excellent and highly recommended product for my 08 FLHTCU 105th anniversary touring bike.
Totally happy!
V.S. – Florida
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April 20, 2010
I have a 117 inch motor that has had me frustrated, spending money for repairs no one could fix. I lost riding time. It would shut off, stall, idle erratically, backfire, was hard to start and had me to the end of my sanity! I read about and studied the ThunderMax, purchased it, installed it and (after two years of poor riding) I can ride feeling my engine’s power. Every one of those issues is gone! The ThunderMax saved my bike that I have over 40 grand in. Thank you so much. I am overwhelmed with the performance of this awesome system.
B.T. – Florida
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April 13, 2010
I will try and keep this as short as possible... You guys are the best by far. I can not say enough about the customer service I received from Mark Emery when ordering and the outstanding service I received at this years Bike Week.
I came to you with a bike that I could not get to run properly. You guys were balls to the wall with installs and still took the time to help me out with two problems that were not at all related to your ECM. Rob was great to work with. No condescending attitude, no snide remarks just good old fashion courtesy. Not an easy thing to find these days. I was also very impressed with his knowledge of fuel injections systems and how quickly he found the unrelated problems.
I have both the H-D® EFI Race Tuner and a Dynojet® Power Commander®. Nether one of them compare to your product. In all fairness, the H-D® tuner may be a good product but you need a degree from H-D® in order to use it. In my opinion, nether one holds a candle to your product. From the simplicity of installation to the Prepare and Send, Module Data E-mail functions. It's like having your own personnel ECM tech. You just can't get any better then that!!
To all of you looking at this feed back page, you will not be disappointed in this product.
J.F. - Florida
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February 26, 2010
It’s like riding another bike with power! My first ride with the ThunderMax installed was in the mountains, with my girlfriend on the back. I usually have to shift down to fifth gear-no more! The back firing is gone. I put the ThunderMax on a FatBob in about two and half hours. I could do the next bike in half the time. The manuals made installing the ThunderMax very simple. Thanks ThunderMax!
B.K. - Alabama
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February 16, 2010
It was the first time in two years that I ran in 6th gear at 60 MPH and the bike took off with out down shifting. It gets better the more I ride. My friend told me that my bike runs better than his!
R.R. - Colorado
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December 30, 2009
Thunder Max is everything they say and more, but the best part of the purchase is the SUPPORT from the Tech Team at Zippers. These guys are FANTASTIC, less than 24 hours for a response, usually within a few hours and nothing you ask is too much for them to solve! I wish other companies would take a page from the Zipper’s customer service book! You guys ROCK! All of this and my bike runs better than ever. ThunderMax increased my torque and performance, lowered my running temperature and even increased my mileage. WHAT A DEAL, WHAT A PRODUCT, WHAT SERVICE!
Brian - Florida
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November 24, 2009
I own a 2003 Road King with an injected 124” engine built from mostly S&S components. Anyway, the builder that assisted me in this swap insisted on the Race Tuner and needless to say, after one whole season of problem after problem, I installed the ThunderMax with the AutoTune module. With a couple of easy calls to Zippers, I was literally “Haulin’ Ass” down the road getting 43 mpg. THANKS ZIPPERS!!!
S.V. - Illinois
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October 20, 2009
I have an 05 Road King Custom with engine mods. For the money spent on engine mods, the performance was not that good. I purchased the ThunderMax with AutoTune and WOW! what a difference it made. More Power and better fuel mileage! Thanks ThunderMax! I will recommend this product to anyone with an EFI bike. Best money I ever spent!
R.B. - Tennessee
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October 8, 2009
Just wanted to take a moment to let you know how pleased I am with your product. I was having an issue with my 2002 Night Train and I called your company and spoke to Bill; he was the most down to earth person I have ever spoken with and recommended that I go with the ThunderMax system with AutoTune. I have to be honest here and was very hesitant about spending close to $1000.00 dollars on a new fuel management system when there are numerous systems out on the market for well under half the price. Bill informed me that he was aware of my concern and offered me the option of returning the system if I was not completely satisfied with how the bike ran with the system installed.
The package arrived in the mail two days after I spoke with Bill and installation took just about 5 hours to complete; I also changed my air cleaner assembly and installed new pipes on bike at same time. I programmed the ThunderMax with and took out the bike for a test ride. Can you say hold on tight? I was sold on the unit ten minutes into the ride!! My 2002 Night Train ran better in those first ten minutes than it has for the past year!! Acceleration is much, much, better and throttle response is dead on. The pinging is gone and more importantly I can see that my oil temp in the same weather and temperatures is down at least 12 degrees from the previous stock system.
This bike rides great and I can attest to the fact that anybody running the above system will be extremely happy with the results!!
R.D. - Illinois
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October 4, 2009
I own a ThunderMax on my bike and am pleased to tell you that this is probably the best of its kind on the market. I researched a long time before making this purchase, and the way my bike runs today is proof that this is one hell of a EFI.
Thanks again, keep making great products!
B.H. - Arizona
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September 19, 2009
I got the ThunderMax installed and my wife and I went for a ride, about 110 miles. I couldn't be happier with the ThunderMax. This is the best money I've spent on the bike! Everything is perfect. The bike starts better, no backfire or popping, 1000% smoother and I can’t believe my valve train noise is almost completely gone. What a difference!!!
M.L. - Florida
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September 18, 2009
I traded a 2003 Wide Glide for a 2009 Fat Bob in July. Loved the handling of the FatBob, but it ran very poorly - no power, ran lean and hot (the plugs were white instead of tan), idled erratic, backfired and popped on decel, required grinding on starter for 1 1/2 to 2 seconds to start (hot or cold)and vibrated so bad over 70 mph your feet would walk off the pegs… After taking it to the Dealer for the 1000 mile service, with the above complaints about the vibration and lack of power, they were not able to improve it. I was ready to return the bike and get my 03 Wide Glide back. I had talked to the ThunderMax rep at J&P Cycles open house, then researched on line and decided to try the ThunderMax. What a difference!!!!!!!
The very first time I rode the bike after installing, I was flabbergasted! “This couldn't be the same bike!” I now have over 2000 miles on the bike, and am totally sold on ThunderMax. This bike runs cooler, way stronger (pulls like a freight train from idle up), can't hardly let go of starter button and its running, vibration is totally gone (over 85 and smooth as glass), idles smooth and stable, now sounds like a Harley, plugs are nice tan color, on decel I now get nothing but a deep rumble with slight hint of a cackle, and nothing in it's size will run with it. When I first installed the system, I contacted Randy at ThunderMax tech assist and he was extremely helpful and professional. He knew exactly what he was talking about, is obviously very knowledgeable about the system, and didn't talk down to me.
I highly recommend a ThunderMax system (and their people), if you want your fuel injected Harley to run like it should, and wouldn't think twice before purchasing again.
L.R. - Iowa
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August 24, 2009
I purchased a ThunderMax EFI System for my 07' Ultra Classic. The 07' Ultra had a terrible "ping" in 5th and 6th gear at around 3000 rpm. I tried a "piggy back" system (cheaper), which did not correct the problem. I was really frustrated. After 3 or 4 different opinions from 3 or 4 different Harley dealerships, I went to Thunderbird Motor Sports and they "matter-of-factly" told me to use your product. I had them install the new "brain" and can’t believe the results!
My Ultra now runs and performs the way I believe it should! I had it to 10,500 ft elevation and running at a variety of RPM's and your system worked. Only once did I detect the slightest "ping" and within a few seconds it was eliminated! At a mile high (I live in Denver area) it runs like a champ! I had my doubts that anything could fix my Harley, you all made me a believer.
Thanks!
S. P. - Colorado
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August 6, 2009
I installed the ThunderMax with Auto Tune along with the Fat Cat 2 into 1 exhaust and high flow filter and loaded the base map listed best for my combination (88 Cubes Stock 2002 Road King). Ran the IAC Auto and went riding. I have to say this product is awesome! No more decel pops, no more rough running when cold, and in perfect tune at any rpm and any speed. I have never ridden a Harley that was as close to perfect tune as this bike is and I've had many from knuckles to pans to shovels. I have not written an custom map set from the module yet but plan to soon (not that you could get this bike to run any better) to see what changes the Auto Tune had to make to the original mapping.
I have purchased another for my V Rod and I am sure it will work just as well as the one I wrote about.
Thanks for a great product and ride safe,
T. G. – Missouri
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July 29, 2009
Just want you to know how impressed I am with the ThunderMax system! As you know, I am computer illiterate. For years I have avoided working on fuel injection systems. And after working with other systems, I have found them to be, well, junk. You can't get peek power from them. After doing extensive engine work, to only to come up with 70 horses... Well, that's very depressing. After installing the first ThunderMax at my own expense, I am here to tell you that I will never do another injected bike with out a ThunderMax. This system is the most simple thing to install, and it did everything that you said it would. I am impressed. Every time you restart the engine the bike runs better and better.
As you know, I have been writing for Iron Horse. When I install the next system, I will do an article on the ThunderMax, and let the readers know how good the system is and how easy it is to install. Thanks for personal service.
W. B., Connecticut Performance Center – Connecticut
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July 14, 2009
I can't thank you guys enough for all the help and support over the past 3 years. I own a 2006 Dyna Wide Glide that has had extensive head work. I have had the S.E. Race Heads installed, along with Pistons, Cams, Special Exhaust and Intake. While the work was being done, I researched the types of computers that were available for my modifications. I found your product, ThunderMax with AutoTune, to be superior. I bought the unit, and installed it myself. We even created a special map for my modifications. Needless to say, I am a very satisfied customer.
A. P. – Connecticut
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July 1, 2009
I got my ThunderMax on Monday afternoon. The install took about an hour. Programming and initializing the ThunderMax was very straightforward. I have ridden approx 150 miles and the ThunderMax is much MORE than I expected. Starting is effortless and almost instantaneous. The engine is much smoother from idle to redline. Unbelievable performance change!
The ThunderMax with AutoTune made me realize the potential my motor had, that I could never achieve before. I know tuning will continue to get better the more I ride and can’t wait to put more miles on it. I will be happy to tell anyone what a great product this is. Thanks again!!
W. H. – Maryland
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June 23, 2009
It all started December 2007... I'd been riding for a full year and I knew I never wanted to be a passenger again. My modified XL 883 (I'm 5'0' and 100lbs so my husband had some lowering to do) was just right...well almost. I was always at the back of the pack. Those long rides cruising at 75-80 were not working for the 883 and God forbid if I had to pass anyone while in 5th gear. I needed more power.
In comes the crew at Zipper's Performance. I dealt solely with Pete Stewart, who is great. Not only did he always have an answer (and within 24 hours of my calls or e-mails), he never once made me feel as though I was a uniformed girl. Some other companies I spoke to were not as "female rider friendly"... Thanks guys for having joined the 21st century.
I decided to upgrade to the 1200 EFI Torkster Kit with ThunderMax. When I got my 1200 Torkster back and broke it in, I was flat out amazed. I have so much power and it's effortless to keep up with all the big bikes now! How sweet it is! These guys have it all, technical genius (the internals of my new engine are a work of art) and AWESOME customer service. I can't say enough good things about Zipper's.....They are the BEST. I now proudly sport my favorite tee shirt, while I'm at the front of the pack, "You have just been passed by a Sportster".
L. L. – Arizona
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June 15, 2009
Awesome product! My bike has never started and run this good before!
P. T. – Colorado
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June 11, 2009
I purchased a ‘07 Fatboy in September ‘08. I was just going to put on a hi flow air cleaner and Vance and Hines staggered duals but my salesman at Southeast H-D in Cleveland said I had to watch out… I might lose my low end power with the duals and might have to get a tuner. I research different websites and chat rooms. Everyone raved about the ThunderMax. So, I bought it.
What a difference! I love the combo. It improved low end torque, the top end, and everything in between. The dealership service and mechanic guys were very impressed. I don't have to down shift all the time and the throttle response is phenomenal. Keep up the excellent work!
M. C. - Ohio
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June 2, 2009
I was looking for an EFI setup for my 2009 Softail after I installed new pipes and air filter. The ThunderMax with AutoTune was plug and play, install (15 min.), load map, and drive. The AutoTune adjusts the A/F automatically. The software is very easy to use and enables the user to adjust almost all parameters of the ThunderMax. The ThunderMax is well worth the money. Great tech support, also.
M. P. – Texas
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May 26, 2009
Great product! Light years ahead of other closed-loop systems! I couldn’t believe how knowledgeable and helpful Bill Lam and the rest of the Zippers crew were. The ThunderMax performed flawlessly. Quality people with a quality product!
P. H. – Georgia
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May 18, 2009
Pete, ThunderMax is the most significant upgrade that I have made to my bike, it is a 95 cubic inch stage II, pipes are 2 into 1 it brings everything together. I had a power commander like so many of my friends, the ThunderMax has put an end to that foolish mistake, no more dyno runs necessary. The ThunderMax has more power throughout the complete RPM range, I cant believe how smooth it is. ThunderMax, hands down the best possible tuner. Ultimately a product is only as good as the people behind it and your technical support is PHENOMINAL!!! Forever a Zippers customer!
D. B. - Oklahoma
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April 19, 2009
Just want to say ThunderMax great. Bike doesn't run hot anymore and the throttle response is so smooth. I am very impressed! Thanks!
B. J. - Georgia
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April 13, 2009
This is the best thing since sliced bread. I love this ThunderMax. I tried P.C. and it was ok. I had it on my 07 deluxe and when I got my 08, Harley changed all kinds of things. When I found out I could not use it on my 08, I was told to try out the ThunderMax. Tt was the best move! It did everything they said it would do! Any weather condition heat, cold, wet, dry, fast, slow, sea level, mountains - my bike runs perfect, always! And one more thing - my 08 is a six speed and I live in the mountains of western NC going up a 7 percent grade. I can ride in 6th gear at 45 mph, no kidding, just as smooth as a flat road. Try it - you will like it!
J. E. - North Carolina
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April 13, 2009
Hi - My name is Tom and I would like to share my experience with my 2008 V-Rod Special and my wife's 2007 V-Rod Night Rod. We didn't plan on doing much to these bikes. In the past, I used D&D pipes and was very pleased with them. I chose D&D 2 into 1 Fat Cats. The 1st bike was the 2004 with out a 02 sensor. Most people I spoke to encouraged me to get a power commander and dyno tune it. It helped a little, but it still had a major decell popping and ruff running at a slow speed. Then came the 2008 V-Rod. My major complaint for this bike was the pipes would turn cherry red at highway speeds. Even in its stock form right from the factory. This bike did have 02 sensors. So back to the dyno guy and another power commander and another $700.00. This power commander eliminates the 02 sensor. More decell, popping and very ruff warm ups. Disgusted and ready to sell the V-Rods. Did some research with Zippers, who installs ThunderMax ignition. Several months before Daytona '09 I spoke with Peter from Zippers about his product. He has some mighty big claims. We hooked up in Daytona and he installed his ThunderMax ignition into both bikes. The '08 bike was easier, because the 02 sensor bungs were already installed. The '07 was a little more work. The crew from Zippers removed the pipes and welded a set of bungs in right there at their trailer site. The 02 sensors were installed. The rest of the ThunderMax went in easy. The tech from Zippers after doing all their computer magic, they sent us on our way and told us to return after putting on some miles. The bikes ran awesome. We went back a couple days later and they dial them in closer. Better all the time. We went back one more time before bike week was over for a little more computer magic. The T-Max systems are awesome. The more you ride the bike the computer learns your riding style from the 02 sensor. It doesn't matter what the weather is or the climate is the computer is always updating. So anyone out there that has a new fuel injected Harley. Don't waste your money on old narrow band technology. The wide band T-Max will get more out of your bike then anything else...
T.R. - Connecticut
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February 28, 2009
I purchased the Thunder Max Digital Speedometer last year for my 05' Train, and what a difference in looks and style! Very easy hook up, and functions. I am very happy with it, thanks. In fact, I just had a friend of mine also purchase one after seeing mine.
D. E. - Florida
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February 11, 2009
I have an ‘01 Deuce that has been transformed into a monster! I purchased your ThunderMax when it first came out. Well, I picked ThunderMax for several reasons. One of was company credibility. Another was pride in products they market. I also purchased the Speedometer, which you don’t sell for deuce. With a little imagination, I made it work. Also, I love those features. I will be purchasing N.A.D.S. next. Thank you so much for making our lives a little easier.
G. B. - Texas
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August 30, 2008
All I have to say is that this system performs outstanding! So far this is the greatest purchase of the year and, after I get done tweaking this thing to my demands, I'm sure this grin I have will get even bigger! 1000 miles of road time and still going’! Phenomenal product any which way you look at it. Thank You Zipper's!
B.H. - Illinois
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August 21, 2008
Just went for my first test ride. The difference is night & day. My bike runs like it never ran before. If a dufus like me can do it, anyone can! I think if I had a new Harley I would put a TM/AT on it. Thanks.
J.T.H. – Texas
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July 9, 2008
This unit has transformed my FXSTC into something I actually enjoy riding now. Pulls strong, runs cooler and still gets 44 mpg.
R.B. – Canada
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June 11, 2008
I can't believe how much better my bike runs. It is an '07 Ultra, and all of my heat problems are gone. I set the idle at 880 rpm and it sounds right and idles smooth. I enabled the decel fuel cut and that works perfectly also. Low speed drivability, low and high speed acceleration are all 100% improved. At cruise speeds it even sounds happier. That is the best bang for the buck I've ever seen.
L.P. - Texas
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May 25, 2008
I just had my 2007 Softail fitted with the 103” kit and cams. It has Vance & Hines and a hi-flow air cleaner, etc... I opted for the ThunderMax with Auto Tune unit as to avoid dyno-ing all the time and I liked the idea of the Auto Tune. WOW! No popping on back throttle, awesome power, response, smoothness, idle and sound! My bike is now twice as good as it ever was… I am totally impressed.
M.H.P. – Western Australia
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April 8, 2008
Installed this on my 2007 SE Ultra 110. Before the bike was excessively hot and the rear cylinder would ping and the bike would lose power. Since the ThunderMax and Auto Tune, the bike has excellent throttle response and power. Rode it in the 99 degree South Texas heat with no heat issues and excellent power! I installed the entire system in two hours (hardest part was replacing the NB-O2 sensors with the WB-O2 sensors). Very easy!
L.D. , Texas
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April 8, 2008
I just installed the ThunderMax on my 07 FLHX with Reinhart pipes and an Arlen Ness Big Sucker air cleaner. The setup was easy and my bike runs great. I love the fact that it has some balls now in 6th gear. The throttle response is great all through the rpm range and the sound is deep and awesome. I would recommend this product to everyone with fuel injection. I can't wait to get out on a road trip and put a couple thousand miles on it. Thanks Guys! Once again Zipper's comes through with great performance!
J.K., Kentucky
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October 10, 2007
This isn't the same bike anymore. My buddy has a 2005 103ci CVO and I stay right with him with basically a stock 2006 Street Glide 88ci and true dual pipes and a SE Air Cleaner. I couldn't be happier. Having the Auto Tune is a huge plus living in Colorado. Riding fully loaded plus my girlfriend on the back in varying altitudes from 6,000 to 14,000 feet and having plenty of power is really nice for a change. The look on people's faces when a bagger takes off the way mine does is priceless. Thanks for such a great product and very knowledgeable support team when I needed it.
J.S. - Colorado
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May 5, 2007
I purchased and had my Thunder Max EFI module installed at 2007 Daytona Bike Week by your crew at Bruce Rossmeyer's Daytona H-D vendor area. The service was great and the installation was done as scheduled. The first time I started my bike after the installation I noticed the difference. I have a 2002 classic with an H-D stage 2 big bore kit, Hi-flow air cleaner, V&H header pipes and Bassani true reverse cone megaphone mufflers. I had the H-D map programmed at the dealer but they couldn't get it right. Then they suggested I use a V&H Fuel pack or a Power Commander module but would not guarantee the results. After your installation I noticed pinging, popping and backfire was gone, acceleration is greatly improved, starts and idles better, it was a very good investment and would recommend this system. Thank for a great product that works.
J.K. - Kentucky
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March 20, 2007
I am very pleased with the product, it makes all my problems go away; Trust me, you need this product if you have a new 96 EFI with the 6 speed. The engine runs different, sounds different, I love the sound, and it even idled it down a bit. Every thing works great the only difference is the my alarm lamp light comes on for a few seconds after I star the engine, then goes out, not a problem and the alarm works fine. The ride however is wonderful...I can now run in 6th gear and not feel like I am lugging it. I can even go into it at a lower mph and fell good. I don't have to downshift to get up and go. I have more torque and can tell it. I also know in my mind that I am not running lean and the engine temp will be ok, I was so worried about that. I may or may not tinker with the Air Fuel tables for fuel mileage; it works too good like it is. I am now wondering what it would feel like if I purchased a higher flow air cleaner ( I would not have dared to do it with the lean running original computer on) This is no doubt best money I have or will ever spend on my Harley, it makes it worth the 23K I paid for it(the bike that is...LOL) As for the price of the ThunderMax......for what it has done for me and my happiness with my bike..............If I knew for sure what I know now, I would have paid more,........down right reasonable and a very must, like I said, for a 07 owner.
R.G. - Wisconsin
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March 19, 2007
We put the units on both my husbands and my bike. They are no longer back firing- the increase in power is incredible in mine. Normally, I have a difficult time keeping up with my husbands Road King, but now I am right up with him. I have a 2006 Fatboy. The bikes sound awesome and run terrific. The best investment!!! Pete was so knowledgeable and the service team at Daytona was absolutely fantastic. Great job, great product and now great bikes.
K.P. - Arkansas
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July 18, 2006
Pete,
I received the ThunderMax (TM) yesterday and got it installed.
WOW, WOW, WOW.
I cannot believe the difference. Not that I was anxious to install it, but I spent an hour in 100+ heat to install it. It was the best hour I have spent on my bike so far…
I took it out and ran it under the normal conditions I had tried before.
In town, I no longer have to keep it (my bike) in a lower gear to keep the RPM up past 2600 (to keep it from lugging and to get good throttle response)! I can now
cruise around as low as around 1700 RPM and still have excellent throttle response. No more flat spots after 5800 RPM, either. Now it pulls strong all the way to
6200 RPM!
Cruising down the highway at 70MPH, I now roll on the throttle and get a nice gentle push back in the seat - before it just would labor unless I downshifted.
Now when I get off the throttle (no matter if it is on the highway, coming off an off ramp or slowing down for a stop light) no more rumbling and backfiring! Just
a nice purr! The exhaust even sounds totally different.
Before the plugs where white - I mean white as a new piece of paper! Now, well you already know the story, a nice light tan both front and back.
Am I happy? You bet I am, and this is only after just getting back from 50 miles in 94 degree heat. I am sure it is only going to get better.
Now, will I suggest the TM to others? "Hell Yes".
Will I be getting the update or the closed loop system when you announce it? "Hell Yes".
Will I be looking at other products that Zippers has?? "Absolutely."
Thank You for a great product and your help in getting a TM for my setup in a short period of time.
H.D., Overland Park, KS
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June 2, 2006
I purchased your Zipper's ThunderMax Magnetti Marelli conversion kit and have just gone over the 1,000 mile mark with the new system. I cannot
thank you enough for the improvements that this system has provided for my bike.
My bike is a 1999 R. K. with a S. E. 95" big bore, 203 cams and Bassani True Dual pipes. It's a great bike in every respect except for the old MM
throttle body and ECM. Prior to purchasing the Zipper's EFI, I had tried everything including the latest USB Power Commander and a few trips to a
Dyno tuner to try and get it right. My last dyno tuner said the old Magnetti Marelli system just has some inherit problems and that's why Harley
Davidson scrapped them after a few years.
With the old Marelli system I experienced erratic idle, deceleration popping, and very quick, uncomfortable deceleration when I let up on the throttle.
I was at my wits end and had even considered selling the bike.
Fortunately, I came across an article in Hot Bike magazine that reviewed your Magnetti Marelli conversion kit and showed how easy it was to do the
installation. The magazine gave it rave reviews so I called your tech support line to see if the system would solve my problems.
Installation was a breeze. I did have to remove the tank, but with the Harley manual and Zipper's instructions, I was able to get the job done in 6 hours.
In a nutshell, Zipper's conversion kit turned my bike into a whole new machine!
1. Deceleration popping is gone!
2. Deceleration is smooth, just like when you let up on the gas pedal in your car.
3. Idle is rock solid steady. Best of all, with the single barrel throttle body, I get the classic Harley loping idle. With the Marelli dual barrel throttle body, my bike's idle sounded like a car.
4. Finally, with the larger 50mm throttle body, I'm getting much better performance. My bike pulls hard and fast, and I'm still getting 40 MPG!
I could not be happier with the product and the technical support that Zipper's has provided!
Thank you, K.H. Marietta, GA 06-02-06
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October 8, 2005
Gentleman: I am not going to sit here and reiterate what other testimonials on your website attest to, even though what they attest to is NO BS.
What I am gong to Attest to is that I have been riding and tinkering with motorcycles for 32 years most of which are or were Harley Davidsons. I ride
my bikes in a certain manner, as we all have our own way and style in which we ride. My 04 FLHTCI could not be ridden in the manner of which I am
accustomed to. I have been back to the dealer time after time with the same answers. Nothing is wrong. After a year of talking and researching products
on the market, I made the call to Zippers.
So We spoke about my issues. You guys took the time and explained your product in specific detail. What to expect, methods of support. So I ordered
a Thundermax ECM programed for my model bike and exhaust system. 22 hours later it was at my door. Went into the garage to do the install. I started
the bike took it for a short ride in the rain to warm it up, came back home as I was drying the bike off to do the install, i started the bike up and noticed
the first 4 to six inches of the exhaust system was glowing orange. I sat and watched it get hotter and hotter, So i picked up the phone and called the
dealer, they told me to bring it by and they would look at it. So needless to say I did not install the Thundermax ECM.
The next day I took the bike in to the dealer after about four hours of testing on the bike they told me that head temps are in normal range, the ECM has
the correct download and there are no intake leaks. The service manager ask if I could leave the bike there and try to figure out why the exhaust system
is glowing orange.
As I talked with the service manager I told him about the Thundermax ECM I just purchased and Its in my tourpack. He said lets take a look at it. I took
it out and handed it to him his first remark was that he was impressed with the quality of the Thundermax ECM as he held it in his hand and studied it.
We talked a bit, then I asked him if it would hurt anything if it was installed at this time. He said lets ask the head mechanic, we talked with him he felt
it would not hurt anything at this time.
He called over another mechanic and asked him to install the Thunder Max in my bike. The install took about 15 minutes. He started the bike let it idle
for a few and said go take it for a test ride. As soon as I let off the clutch I felt a noticeable difference.
The smoothness of the engine, throttle response, no backfire, even shifting became smoother. I drove back in to the service area and felt that even finding
neutral to be easier. We then let it idle for 10 minutes, the glowing of the exhaust was gone. The next day I put on about 150 miles on the bike. I cant tell
you how impressed I am with the Thunder max ECM.
I have put on a lot of performance products on my bikes over the years, but Nothing comes close to the Thundermax ECM. When you put a product on
the market that works beyond the expectations of a customer, It does not take a rocket scientist to figure out that Zippers Have spent a lot of time and
money in researching and development on the Thundermax ECM and the guys at Zippers have a deep passion for motorcycle performance.
Thank you Zippers, it is guys like you who keep my passion for riding.
J.G., Shohola, PA
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September 20, 2005
Hey Pete, how goes it? I just wanted to say thanks again for the awesome Thundermax EFI controller. I had my doubts at first when I walked over
to your tent and started looking at the Thundermax. In my mind I was trying to compare it to the Power Commander. After talking with you and having
the EFI controller installed on the bike and riding all weekend I must say by far this is the best buy I have bought for my Road King. The Thundermax
has made a real difference in the way my bike runs. Thanks for your help. I tell all my friends about the EFI controller so look out for phone calls.
C.S., Aberdeen Proving Ground, MD
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September 16, 2005
Pete, Got my Thunder Max installed. Bought it with the map for a Hi flow air cleaner and Rhine Hart true dual pipes. It worked great for my 2005
Road King Custom with Screaming Eagle Air Cleaner, and Vance and Hines True Duels and stock mufflers with baffles taken out. It is like a new
machine. No pinging, and popping, like with the stock harley ECU and stage one load. I love this Thunder Max, I can slow up in top gear and hit it
with no Pinging and acceleration is much better. Checked my plugs, they are burning great, Dont even know if I need to make a trip to the Dyno.
Now I just hope I can find some sucker to buy my stock ECU.
M.K., Gresham OR
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August 5, 2005
With the install of Zipper's 120 muscle engine my 01 Screamin Eagle Road Glide absolutely smokes all current SE bikes that are hitting the road
even today! I set out to create a "sleeper" and with help from Zipper's that's exactly what I ended up with. For all you guys riding dressers imagine
the look on your buddies faces when you hit the gas and with everything right you go from first gear to second with only the rear tire on the asphalt.
More than once people have told me that seeing a dresser launch riding on one wheel is absolutely kick*#*! Thanks Guys!
J.O., Otterville, MO
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July 17, 2005
Hi Pete, how are you?
I just came back from a trip throu southern Spain, it is wery similar to Arizona or Utah...I rode 4500 miles and I have to say one thing: bike runs
really really good even when we had air temperature of about 42-45 degrees celcius and an altitude range of 9000fts (beach--sierra nevada 3200mts
altitude difference)! I just wanted to let you know that I am really happy...but know I realize that I want also a big bore, throttle body and a headwork
done on my bike...next winter.
Thank you have a nice summer. Cheers, P.M., Giubiasco, Switzerland
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June 5, 2005
Hi Pete,
Just a note to say thank you ever so much for all your help, and for a great product.
I installed the Thundermax EFI Controller on Friday afternoon June 3rd, and without a doubt it has to be the best thing since sliced bread. All kidding aside.
I'm finding that my Ultra has never run correctly since I had the modifications done to it. As you know my dealer had installed the H.D. EFI Race tuner, saying
that this would cure my problems; but it only made them worse, and then the dealer didn't have a remedy or a solution for it. As you are aware from my e-mail
and talking to my wife Michele, I was at wits end. Until I happened across your ad in the June issue of Thunder Press and sent you the email detailing what I
had done to the bike, and your response to that e-mail and your willingness to explain the many different questions to Michele who in turned told me. Then we
purchased your product. Wanted to tell you I had the dealer take the Race fueler out and when I rode it home the pinging and the back firing were back.
And now for a few comments on your product; the ease of installation was a breeze, the hardest part was removing the seat and disconnecting the battery.
The directions were very concise and straight forward. After the installation came the moment of truth, The throttle response is simply amazing, and it doesn't
seem to matter which gear you happen to be in, it just responds. No pinging, no backfiring no matter if your riding double and deliberately lug the engine. It has
not done much for the engine temperature , but then both days were in the high 80's and humid. So we'll wait and see on that issue. I have noticed a drop in
gas mileage but its hard to have an accurate baseline as prior to this install I had the HD race fueler in it the bike was getting about 175 to 180 mile on the tank
prior to the fuel warning light coming on. The first tank of gas with the Thundermax installed I got 35.11 MPG, will wait and see on this as well. Because I'm
finding out that I'm not so sure this bike has ever performed correctly since all the modifications I have done since it was new in 2002. But one thing I am sure
of now is that since I installed your product the engine sounds and runs so much better, the cold idle is smoother, when cruising along in 6th gear at 70 to 75 MPH
the exhaust tone is deep and rich and the engine sounds like it is running effortlessly, and the throttle seems much crisper and responds to every little nuance no
matter how small. It just seems to run better throughout the entire range from idle to full on throttle response.
You were correct - I did notice the difference in about 15 minutes and kept noticing for the 200 miles we put on the bike. Will keep you informed as to progress.
We have a great test in mind Michele and I are leaving July 29th for Colorado then Wyoming, then to Sturgis then on to North Dakota into Canada then back
home to Maine. Will let you know how the bike and your product performs. Thank you again for your great product.
J.B. Palmyra, Maine
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May 9, 2005
Tony,
Just wanted to let you know that the ECM I purchased for my 2004 Deuce works great! I had a power commander and replaced it with the Zippers
ECM mapped for V&H staggered shortshots. The Zippers ECM performs so much better than the power commander. The upgrade in performance
is unbelievable (like night and day). My friends were amazed that your ECM made such drastic results - I was too. Look forward to purchasing your
other products when I begin my motor work! Thanks Again!
Regards, E.A.S. Brighton, MI
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