WSM Piston Kit - Yamaha 350 - +1 mm 50-540-07K 520 M3 Chain pins and seals needed for

pins and seals needed for repair

High-quality polished cast aluminum construction

Alpinestars Level 1 Bio Flex Plus armor on knee (Alpinestars Bio-Flex hip protector available as an assessor upgrade

KTM 250 XC-W TPI 2019

WSM Piston Kit - Yamaha 350 - +1 mm 50-540-07K 520 M3 Chain pins and seals needed forQuality 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