Scooter Starter Relay Solenoid for X10 125 350 MP3 400 500 X-EVO X9 500cc This starter relay solenoid is designed to fit scooter models including X10, 125, 350, MP3, 400, 500, X-EVO, X9, and other compatible 500cc.It functions as a key electrical component in the starting system, engaging the starter motor when the ignition is activated.The solenoid ensures power transfer from the to the starter, enabling smooth engine startup.Built for and consistent performance, it serves as a direct replacement for.Installation is straightforward, matching the specifications of the designated scooter models.