WSM Piston Kit - Yamaha - +.50 mm 50-520-05PK Competition Muffler Packing Brake tip is finely machined

Brake tip is finely machined CNC part with stainless steel set screws for durability and grip

Easy to mount

Easy-to-read

Comes pre-assembled to ensure fit and finish

WSM Piston Kit - Yamaha - +.50 mm 50-520-05PK Competition Muffler Packing Brake tip is finely machinedQuality 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