Pulley Needle Bearing: HK172518RS; ID of Bearing in Rear Torque Driver Pulley: 12mm (6901RS)
This Adjustable Torque Driver Allows You to Adjust the Acceleration of CVT Transmission to Suit Your Needs
3 Straight Groove= Quiker Take off; 3 Bent Groove= Higher Top Speed
Fits Chinese GY6 49cc-100cc Scooters and Karts with 139QMB 139QMA 147QMD Based Engines
Description
1.New Products with High Quality
2.Replacement for GY6 50cc Stock Clutch Drive Sheave
3.Fits Most of Chinese Made Scooters and ATV. Such as JONWAY, JMSTAR, ROKETA, SUNL, TANK, PEACE, TAOTAO,JCL,Coolsport,Kazuma