ECM Thunder-Max 309-365 Installation Manual

www.Thunder-Max.com

309-365  Installation / Setup Guide V2009.04.23   

ProductSupport@ZippersPerformance.com 

1

Part # 309-365 for Sportster® Models 

Thank you for purchasing a ThunderMax ECM! 

Please read through the following instructions before 

beginning the installation procedure. Following these 

instructions will ensure that the ECM is installed and 

setup properly for optimal results. If you have any 

problems or questions, please refer to the SmartLink 

Tuning .pdf Manual, included on the CD (Help Menu) 

with this package.  

Step 1

Inse the SmartLink 

CD into your computer.

SmartLink will automatically 

open the InstallShield 

Wizard when the computer 

finds the CD-Rom. Follow 

the instructions and install 

the software on your 

computer. If you do not have a serial port on your 

computer for the communication cable, you will need to 

use a USB to Serial converter (an inexpensive converter 

is available from Zipper’s, #372-000). Install the included 

driver disc at this time; follow the instructions given by 

the manufacturer of the converter for installation.  

Install the Thunde

rt 

rMax and AutoTune modules.  

Step 2

Due to the mounting location and space constraints on 

the Sportster® for the ECM, your ThunderMax system is 

supplied with a separate AutoTune module.  The 

ThunderMax ECM mounts in the same location as the 

factory ECM under the seat; the AutoTune module must 

be mounted separately. 

Remove 

Step 2a 

the seat. Open the 

left side frame 

cover (opposite the 

oil tank) to expose 

the fuse panel. 

Locate and remove 

fuse labeled “ECM 

POWER” (top left 

fuse; sticker with 

fuse identification is 

located on the inside of the frame cover).   

Step 2b

 Unplug and remove the factory ECM from the 

motorcycle (located on top of the rear fender under the 

seat).  Plug in and install the ThunderMax ECM in the 

same location over the locating pins shown.  

Step 2c 

Install the AutoTune module.  Mount the 

AutoTune module to the frame backbone using supplied 

wire ties (right side view below).  Position housing so 

wires exit to the left as shown below.  

Installation / Setup Guide

Please Note:  This product is Legal in California 

only for racing vehicles which may never be used 

upon a highway. 

The user shall determine suitability of the 

product for his or her use. Installation and use on a pollution-

controlled vehicle constitutes tampering under the U.S. EPA 

guidelines and can lead to substantial fines. Review your 

application and check your local laws before installing.