Motorcycle Digital Ignition Relay compatible with models FD440V, FD501D, FD501V, FD590V, FD611V, FD620D, FD661D, KAF620, Mule 2510, 2520, and 2500.This ignition relay is designed to support engine start-up and stable electrical function.It integrates into the motorcycle's ignition system to help regulate power delivery during.The unit is built for and consistent function under normal operating conditions.