18P-819450R YFZ 450 YFZ 450R YFZ450X Special Edition This starter relay solenoid is designed for use with specified motorcycle models.It functions as a key electrical component in the starting system, engaging the starter motor when activated.The unit provides switching function and is built to meet specifications for fit and function.Installation is straightforward, connecting directly to the existing wiring harness and mounting points.This part consistent of the starting mechanism under normal conditions.This item is a compatible alternative.Use of brand identifiers is limited to showing which models it fits.