WSM Piston Kit - Yamaha 350 - +.75 mm 50-540-06K Fortress Skid Plate Dyno tuned velocity stack directs

Dyno tuned velocity stack directs airflow to engine

multi-material main shell incorporating 420 Denier poly-fabric

Lightweight abrasion resistant 4-way stretch polyester

Back compartment can accommodate the Nucleon back protector (available as an optional upgrade)

Viscoelastic PU foam compound knuckle guards are profiled for performance

WSM Piston Kit - Yamaha 350 - +.75 mm 50-540-06K Fortress Skid Plate Dyno tuned velocity stack directsQuality 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