WSM Piston Kit - Yamaha 660 - Standard 50-544K Aircharger® Intake System Baskets utilize stainless steel drive

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

CNC machined ball joint block

Anti-scratch visor

Once this is capped off the air injection system can be safely removed

display unit: 0

WSM Piston Kit - Yamaha 660 - Standard 50-544K Aircharger® Intake System Baskets utilize stainless steel driveQuality 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