This replacement starter solenoid relay is engineered for compatibility with specific YZF-R1 (1999–2006, 2009) and YZF-R6 (1995–2007) motorcycle models.It functions as a direct-fit component within the ignition switch system to assist in restoring normal starting.Built with materials selected for under standard riding conditions, it supports consistent electrical function.Installation is designed to be straightforward, requiring no major modifications to the existing starter system.This part is intended as a functional replacement for the solenoid relay in the listed models.