Starter relay aka starter solenoid for 500cc, 550cc EFI (Electronic Fuel Injected) ATVs. This relay operates in the same way as other non-fuse based relays and using a 20A in-line fuse is one of the best ways to provide additional circuit protection. Most commonly used for (but not limited to) Chironex Bandito 550cc EFI ATV, GIO Rock Liner 550cc EFI ATV, Buyang 550cc EFI ATV as well as many other clones, rebrands and similar displacement machines.