WSM Piston Kit - Yamaha - Standard 50-520PK K1 S Track 46 Helmet Durable stretch poly-textile upper with

Durable stretch poly-textile upper with leather palm for abrasion resistance and comfort Alpinestars Drystar® waterproof and breathable membrane

The RadiusX clutch prevents engine stalls so you can focus on the ride and let the auto clutch do the rest

easy installation

Fixed inner liner with multi-panel construction and 3D mesh inserts to improve comfort and ventilation

perfect for touring and highway use Includes oxygen sensor bungs

WSM Piston Kit - Yamaha - Standard 50-520PK K1 S Track 46 Helmet Durable stretch poly-textile upper withQuality 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