ThunderMax Auto Tune 309-466 for 2002-2018 Harley V-Rod Models





If your exhaust system does not have the 18mm 02 sensor bungs required to operate this unit or if they are in the wrong place, you will need to purchase a pair of weld-in bungs below and have them welded into your existing exhaust or you will need to purchase a new header/exhaust system with the 18mm bungs.





  • Cycle Solutions Inc. has ThunderMax certified technicians on-site that install thousands of these units.
  • We will pre-load a base map for you based on the modifications you provide us for a quicker, easier installation.


  • We have advanced software that allows us to make more adjustments than the basic end user software allows.
  • We have a dyno on-site that allows us to check calibrations and make map adjustments if needed.
  • Our installation package includes professional installation by qualified technicians, NGK Iridium Spark Plugs and dyno time.

  • Dramatically improved throttle response by allowing throttle blade to open fully below 3500 RPM
  • Eliminates popping, spitting and backfiring
  • Easier starting
  • Increased Engine Performance & Motorcycle Rideability
  • Cooler, Smoother Running Engine
  • Adjustable Idle Speed & Rev Limit Control
  • Automatically Tunes for Riding Style & Riding Conditions
  • Easily Accommodates Bike Changes (Pipes, Cams, and More)
  • 100% Engineered & Made in the USA
  • 3-Year Factory Limited Warranty
ThunderMax® EFI with AutoTune System

Does Your EFI Bike Pop? Spit? Backfire? Start Hard? Run Hot? Deliver Poor Fuel Mileage and Performance? 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 module, 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 install it, program it or make adjustments.

Just how easy is it?

Installation is a straightforward replacement of the factory module and oxygen sensors*. The ThunderMax SmartLink software 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 injectors, fuel pressure, throttle body or exhaust flow. With every tank of fuel, at any temperature or elevation, your engines’ tune is optimized by ThunderMax!

As simple as we’ve made it 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.

Features Include:

  • Adjustable Closed Loop AFR/RPM Targets
  • Adjust Idle speed
  • Adjustable Rev Limit
  • Igniting Timing
  • Automatic IAC Calibration
  • 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
  • Map Analysis Feature
  • Digital Tech Compatible
  • Nitrous*/ Boost Compatible (*excludes V-Rod® model #309-366)
  • Adjustable Warm-up Settings
  • One-Button Tech Support
  • Three Year Warranty

The ThunderMax makes 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 and product support. Dyno Tuners can access Advanced User SmartLink software that allows full custom mapping of virtually any engine combination. The ThunderMax is designed and manufactured right here in the USA and backed by a 3-year warranty!

* Requires addition of 18mm oxygen sensor bungs or an exhaust system with 18mm bungs

The ThunderMax with AutoTune is made in the USA and backed by a 3-year warranty.


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