Serial Data Pigtail Communication Harness

Part Number 309-324

Streamline your connection and enhance accessibility with this GEN 2 ECM  pigtail harness for your ThunderMax. Built to simplify diagnostics, firmware updates and tuning access on bikes where the standard port location is difficult to reach. 

Key Features:

Alternate remote port connection: allows relocation of the standard ThunderMax communication interface to a more accessible point. 

Plug-and-play harness designed specifically for ThunderMax ECM units with serial numbers 114000 and higher. 

Durable wiring and connector build ensures reliable data transfer and minimal signal loss — ideal for bikes with custom fairing, hard-to-access compartments or limited access ports.

Compact form factor keeps the installation clean and unobtrusive with  original port functionality.

Compatibility & Install Notes:

Compatible only with GEN 2 ThunderMax ECM units serial number 114000 or higher. 

Intended for use as a communication harness; does not replace or alter sensor/actuator wiring.

During installation: choose a mounting location with enough clearance for connector access, protect against chassis movement and secure routing away from high-heat exhaust or moving components.

It is recommended to reinstall the standard cap/plug in the original port if it remains in place, to maintain proper sealing.