polished surface allows the spring to rotate independently of the pulley
they drastically reduce mechanical wear against the variator ramp plate
Why Upgrade to a Performance Secondary Slider
Overall Structural Length: 385mm
SSP-G 70cc 2-stroke Big Bore Kit - 12mm Piston Pin spares polished surface allows the springSSP G 47mm Big Bore Head Kit for 50cc 2 stroke 40QMB, E40QMB, 1E40QMB and 1PE40QMB Minarelli engines. These engines are commonly found on many popular 2 stroke full size scooters and ATVs such as Yamaha, Malaguti, Yamati, United Motors X Speed, Aprilla, CPI, Benelli, Vento, Eton, Adly, Geely and many more. Includes cylinder head. Wrist Pin Length: 36. 8mm Wrist Pin Diameter: 12mm Piston Diameter: 47mm Displacement: 70cc Includes Wrist Pin Bearing