WSM Piston Kit - Yamaha - Standard 50-520PK Scorpion Pressure Plate End tabs clip into cheek

End tabs clip into cheek pads to create a closed breath box to keep your warm breath from getting into your shield and creating fogging issues

Owens-Corning fiberglass replacement packing keeps silencers performing as they're meant to

AMA and FIM enduro legal

Made of AISI 304 TIG welded stainless steel Developed on the dyno using specific dimensions for each model with the aim of improving torque and maximum power Compatible with both stock exhaust and LeoVince slip-ons

WSM Piston Kit - Yamaha - Standard 50-520PK Scorpion Pressure Plate End tabs clip into cheekQuality and construction that meets or exceeds OEM Feature improved E clip design Contain piston, rings, pin and clips Additional rings available separately Order one per cylinder Skirts have a nonabrasive, expansion retarding MOS2 coating to reduce heat and friction for added power and longevity MOS2 coating actually draws heat through piston walls and out the bottom Specially hardened tops add strength to ring grooves