Motorcycle Performance Parts Store - Ignition, Fuel Injection, Nitrous Assist, and Accessories

ThunderMax with AutoTune Electronic Fuel Injection System
ThunderMax EFI Module w/AutoTune
Complete EFI Engine Management!

The ThunderMax requires a serial port connection to your computer for programing. If your PC does not have a serial port connection, you can purchase a USB adapter from the "ThunderMax Accessories" section of the webstore (Part #372-000).

Does Your EFI Bike Pop? Spit? Backfire? Start Hard? Run Hot? Crappy Fuel Mileage? Would you like to have full control of your EFI system, freedom to make major or minor adjustments without a master’s degree in electronics and computers? Here is a simple solution—ThunderMax with AutoTune! The ThunderMax is a completely new product that replaces the factory Electronic Control Module (ECM), not an add-on box or signal modifier. The ThunderMax is purpose-built to deliver uncompromising performance but you don’t have to be a rocket scientist to program it or make adjustments.

Just how easy is it? In most applications, installation is a straightforward replacement of the factory module and oxygen sensors*. The ThunderMax SmartLink software (FREE – click here for download) contains hundreds of base maps that cover over 80% of popular factory and aftermarket combinations, dyno-developed by Zipper’s on real motorcycles. Choosing a map is a quick and easy process thanks to SmartLink’s sorting filters; loading a map takes less than a minute. After that, you’re ready to start the motorcycle. Once running, let the bike warm up at idle to operating temperature while the Smartlink software automatically dials in idle and warm-up settings for that particular engine and you’re ready to ride! During your ride, every time you ride, the ThunderMax AutoTune module analyzes the air/fuel ratio read by the wide-band oxygen sensors at warp speed after every cylinder fire and makes any necessary adjustments to the injector pulse width to achieve the desired air/fuel ratio while compensating for variations in engine components such as injectors, fuel pressure or exhaust flow. With every tank of fuel, at any temperature or elevation. That’s it! All you have to do is ride.

But as simple as we’ve made the ThunderMax to install and use, don’t be fooled into thinking that this not one of the most sophisticated systems you can buy for your Harley^®. Using the supplied SmartLink software and communication cable, you can adjust or monitor virtually every parameter of the system:

Closed Loop AFR Targets
Idle Speed
Rev Limit
Igniting Timing
Speedometer Calibration
Decel Pop Control
Read Diagnostic Codes
Running Statistics / Logs
Accel Pump Simulation
Start Fuel Pulse
Engine Temp Alarm
Injector Size Compensation
Live Engine Tuning
Live Monitoring
Live Recording
Digital Tech Compatible
Nitrous Compatible (excludes V-Rod^® model #309-366)
Supercharger Compatible
Warm-up Settings
New for 2009 – Map Analyzer feature assesses AutoTuned map adjustments in a snapshot to simplify map analysis
New for 2009 – AutoMap Creator feature speeds AutoTune mapping and improves the tune of any engine and exhaust pipe combination
And Many More!

ThunderMax makes more sense in the long run as the system can grow and change as your engine does—just load a new map! ThunderMax software, firmware and maps updates are free and accessible 24/7 with an Internet connection so you’re only a mouse-click away from the latest available data. The ThunderMax is designed and manufactured right here in the USA and backed by a 3-year warranty!

NEW! YouTube Video Instructions!
Links to Video Instructions:

1. How ThunderMax Works Click Here
2. Installation Part I 2002-2007 Touring Models Click Here
3. Installation Part II 2002-2007 Touring Models Click Here
4. Installation Softail® Models Click Here
5. Basic ThunderMax Set-Up (after installation) Click Here
6. Exhaust Oxygen Sensor Bung Installation Click Here
7. PigTail Communication Cable Installation Click Here
8. Customer Testimonials Click Here
9. Industry Testimonials Click Here

Questions? Not sure which module version to order?
The team at Zipper's Performance Products is available to help you Monday through Friday, from 9am to 6pm EST. Give them a call at (410)579-2828.

To download free ThunderMax SmartLink IV software, Click Here!
To download ThunderMax installation manuals, Click Here!

The ThunderMax requires a serial port connection to your computer for programing. If your PC does not have a serial port connection, you can purchase a USB adapter from the "ThunderMax Accessories" section of the webstore (Part #372-000).

The ThunderMax PigTail Harness (#309-324) is Now Available from the Accessories Page! This pigtail harness allows a second port for the communication cable connection to the ThunderMax. Handy for motorcycle models with tight clearances around the ECM such as Dyna^®, Softail^® Rocker^® and 2002-2005 V-Rod^® models.

*Requires exhaust system equipped with or modified for use with oxygen sensors

The products on this page not for sale or use on pollution controlled vehicles.

Retail: $0.00

Item # 309

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