WSM Piston Kit - Yamaha - +1 mm 50-520-07PK Youth PowerCore Core Goggles Clear Lens Add increased airflow to the

Add increased airflow to the carburetor

Combed Ring-Spun

clamps and any required lock washers

Exceed OEM standards and performance

Class-leading impact protection provided by knee protectors

WSM Piston Kit - Yamaha - +1 mm 50-520-07PK Youth PowerCore Core Goggles Clear Lens Add increased airflow to theQuality 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