WSM Piston Kit - Polaris 300 - +.25 mm 50-310-04PK MTB Lock-On Grips See full system video at

See full system video at the bottom of this listing that uses this slip-on

TIG weldings

Components not available from OEM

Works great in and outdoors

Simple and reliable alternative to gluing sensor magnet to a bolt or rotor

WSM Piston Kit - Polaris 300 - +.25 mm 50-310-04PK MTB Lock-On Grips See full system video atQuality 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