WSM Piston Kit - Yamaha 660 - Standard 50-544K Aircharger® Intake System Main upper constructed from an

Main upper constructed from an advanced microfiber for comfort

It requires you use both the front and rear docking hardware (two separate items that are not included and must be purchased separately)

Baskets utilize stainless steel drive inserts where the clutch plate tabs make contact with the basket

Anti-scratch visor

CNC machined ball joint block

WSM Piston Kit - Yamaha 660 - Standard 50-544K Aircharger® Intake System Main upper constructed from anQuality 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