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ThunderMax ECM with AutoTune Closed Loop System

This product fits a variety of motorcycles. Please select yours so we can find the right part and guarantee fitment. Select A Motorcycle

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J&P Part: 402-968

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How Auto Tune Works

ThunderMax ECM with AutoTune Closed Loop System

• ThunderMax ECM with AutoTune module mounts conveniently in place of the factory ECM and plugs in to the existing harness

• Maps, software and firmware updates available on line at no charge

• Quickly find the best map for your application using SmartLink Map Filters

• With the AutoTune, AFR tuning for component and exhaust changes are self-adjusting-simply install, download a map and ride while Auto-Tune maintains target AFR in all conditions

• Includes ThunderMax ECM and AutoTune Module, plug-in harness and two wide band sensors, SmartLink Software and communication cable, Quick-Start Easy Install and Comprehensive User's Manual, technical support and free software and updates

• Select and install a matching base map and enjoy the efficiency of a balanced fuel curve for throttle response like you have never imagined

• No extensive dyno tuning required for most models

• Alpha-N design unaffected by long duration camshafts

• Replaces factory ECM - easy plug-in installation and set-up

• Simple adjustable rev limit, idle, speedo calibration and decel pop control settings

• Easily adjust fuel, ignition timing and cold start maps

• Versatile - plug and ride or live-tune a custom application

• Logs engine starts, engine temperatures and total hours of operation time in 100 RPM increments

• Read diagnostic codes through software or traditional methods

• Record live data during riding or tuning sessions; choose replay speed for data analysis

• ThunderMax includes SmartLink Software and cable for easy PC tuning, maps for popular engine combinations and Quick-Start Easy Install and Comprehensive User's Manual

• This product requires a 9 pin serial port to connect to a PC, if your PC is not equiped with a 9 pin serial port you will need product 402-927 which is a USB/Serial port adapter

Product Specs

Manufacturer Part Number: 309-366

Open or Closed Loop: Closed

Sold in Units: Kit


This product fits a variety of motorcycles. Please select yours so we can find the right part and guarantee fitment. Select A Motorcycle

Click (+) to view all compatible models

Harley-Davidson® Models

V-Rod 10th Anniversary Edition VRSCDX : 2012
V-Rod Muscle VRSCF : 2009–2014
V-Rod NHRA Commemorative Edition VRSCX : 2007
V-Rod Night Rod Special VRSCDX : 2007–2014
V-Rod Night Rod VRSCD : 2006–2008
V-Rod Street Rod VRSCR : 2006–2007
V-Rod VRSCA : 2002–2006
V-Rod VRSCAW : 2007–2010
V-Rod VRSCB : 2004–2005

Customer Reviews

Overall Rating:
5/5 based on 15 ratings

5 by

Unbelievable tuning all in less that 10 minutes. Was only able to load stock base map, when I had BUB 7 2 into 1, Arlen Ness Big Sucker Stage I filter. T-Maxx rocks and adjusted from Base map to may set up with no issues.

5 by

easy install

5 by

Best bang for the buck. I have tuned my bike for its best performance and can fine tune it any way and any time I want to. Newest software update allows me to use multiple tuning maps without having to use the laptop. If I am traveling heavy with 2 up and luggage I can call up the map just for this riding environment on the fly and the bike runs great. When riding solo and doing high performance riding I call up the tuning map for this riding style and the bike performs great again all without the laptop. Great product and WELL Worth the money.

5 by

Works great easy install

5 by

I have never had anything but stock electronic control units on my touring bikes. Friends recommended ThunderMax enthusiastically so I went to JP Cycles and bundled a large purchase with pipes, air cleaner, etc. Unit works perfectly. Better throttle response, more hp and torque, cooler engine temp. Wish I had upgraded sooner.

5 by

In the last few weeks I spent way to much money on my '09 RoadKing. Here is how it played out. I ordered a set of Cobra Speedster Duals with PowerPort, Arlen Ness Plain Finish Stage I Big Sucker Kit, Vance & Hines FuelPak. Parts came in and did the install. Called Vance and Hines to verify which map to use. Had decel popping, occasional backfiring, poor throttle response, and lst a major portion of my top end. Put a little over 250 miles on it to see if it would level out. I ordered a Throttlepak to try and eliminate the newly acquired poor throttle response. Which I never installed, The next day I ordered new tires, a Thundermax, from J&P, and ordered a Road Zeppelin Seat from Harley. The seat and ThunderMax came in on Wednesday and the tires on Thursday. I went and had the tires mounted and balanced. When I got home and let the bike cool down I installed the Thundermax and seat. I finished up about 8 last night and decided it was time to go see how all was working. The tires were a mist at the time. The seat made my wife's and my butts very happy. The ting that blew my mind was how the bike was running. It has never run that smooth. at 60 it sounded like a nice smooth idle almost like it wasn't even working. I found a couple of good grades to run up and there was all my top end back just smoother. All I can say is that I am sold. In the future one of these will be going on my '13 Wide Glide also. Good Bye stock Delfi. Hello Thundermax. I guess I have a bunch of stuff fixing to hit ebay to try and recoup some of the funds spent.

5 by

If you are going to use this on a 2012 or later harley touring, get the 2011 header pipes to O2 sensor bungs on the 2011 work the 2012 do not pipes are the same otherwise.

5 by

best improvement for the money you can do

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Important Product Notes

This item cannot be returned once the package is opened. Manufacturing defects must be addressed through the manufacturer directly. Legal in California only for racing vehicles which may never be used upon a highway. Not legal for sale or operation in the state of California.├┐Check with the U.S. EPA and your respective state and local regulations to confirm emission compliance.

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