Small Shop.
Big Performance.
Dyno tuning, performance packages, and mobile dyno services built for riders who refuse to stay stock.
Real Horsepower. Real People. Real Results.
Dyno Tuning
Precision Performance Testing
Professional dyno tuning designed to maximize horsepower, torque, throttle response, and overall rideability. We specialize in Impact Wiring & Thundermaxx
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Performance Packages
Built For Real Results
Proven upgrade combinations designed to deliver balanced performance gains while maintaining reliability.
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Mobile Dyno Events
Performance On The Road
Bringing professional Harley-Davidson tuning and dyno services directly to rallies, bike weeks, and motorcycle events.
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Built For Riders Who Refuse To Stay Stock
More Power. More Torque. More Attitude.
Thunder Valley Cycles specializes in dyno tuning, performance upgrades, and custom Harley-Davidson builds designed to take your ride to the next level.
Dyno Tuning
Precision-Tested Performance
Performance Packages
Built Around Your Goals
Built in Arizona. Ridden Everywhere.
Proven Upgrades.Measurable Results.
Whether you’re looking for stronger acceleration, improved throttle response, or a complete performance transformation, Thunder Valley Cycles delivers solutions tailored to your motorcycle and riding style.
Intake Upgrades
More Air. More Potential.
Exhaust Systems
Performance You Can Hear.
Camshaft Upgrades
Torque Where You Want It.
Fueling Solutions
Support Every Horsepower.
Catch Thunder Valley Cycles On The Road
Mobile Dyno Services At Major Motorcycle Events
Visit us at rallies, bike weeks, dealership events, and motorcycle gatherings where we bring professional Harley-Davidson dyno tuning directly to riders.
What Our Customer Say
Read Real Experiences Shared for Honest Feedback
David Johnston
1 month ago
matthew orr
2 months ago
Jeff Birge
3 months ago
Karl Baird
3 months ago
These guys are a great group of people. Aaron stepped up and help one of our customers during bike week. Great team!
Mark Beavers
8 months ago
Asmith As
11 months ago
Absolute attention to detail from Thunder Valley Cycles. On year 5 with my Road Glide he built. 15,000 miles zero issues. s&s Cam, cam chest, oil pump, Thunder Maxx wide band o2 tuner on a m8 107. 125 lbs of torque, sounds amazing. Full legend suspension. Rides and handles like a dream. Love this Road Glide taking 3,000 miles road trips every year with the ol lady. Can’t thank him enough. Ride with confidence.
David Appl
1 year ago
Aaron got me dialed in @ Bike week. He was enthusiastic while tuning the motorcycle. You can tell thundervalley cares about their customers and their craft.
The Thundermax platform has been great but the autotune feature was not at it’s full potential. If you are running any type of engine management, it is money well spent to have Aaron clean up the map & have the bike run at it’s full potential.
Thundervalley is THE solution for my tuning needs.
The Thundermax platform has been great but the autotune feature was not at it’s full potential. If you are running any type of engine management, it is money well spent to have Aaron clean up the map & have the bike run at it’s full potential.
Thundervalley is THE solution for my tuning needs.
Aaron Davis
1 year ago
Reached out to Thunder valley because of their reviews regarding thundermax tuners and workmanship. I brought my 2020 road glide to them because it was having some tuner issues. When they say Aaron is a thundermax wizard they aren't lying. He showed me the ins and outs of the thundermax, everything he changed and adjusted. He got my bike dyno tuned, and it runs the way it should run now. I'm super happy with the performance of the bike now. Thank you Aaron and Thunder Valley cycles!
Bobby Ferdon
1 year ago
Spot on good solid build n tune. Highly recommend ! Had CR480MT cam. etc., , TAB headers, Thundermax n Dyno. Very impressive numbers.
David Reynolds
1 year ago
This guy is a wizard. The best around and as honest as they come. If he can’t make it go fast or fix it then it can’t be done. He is Old School and a respectful man. No one will ever touch any of my bikes except for Old School. Brought a bike to him in shambles from another bike shop in Scottsdale. He has it running tip
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