JE's single piston for the 660 Yamaha Raptor 5V is supplied individually as a direct-replacement option for engine rebuilds and service on Raptor 660 5V models. It’s intended to let owners or technicians replace a worn or damaged piston with a part matched to the Raptor application referenced in the product description.
JE Pistons 660 Yamaha Raptor 5V Piston Single