50cc REAR DRIVE CLUTCH CLUTCH FOR QMB139 MOTORS OUTER DIAMETER (PULLEY): 118mm OUTER DIAMETER (CLUTCH BELL): 115mm INNER DIAMETER (CLUTCH BELL): 107mm INNER DIAMETER (CLUTCH): 12mm OUTER DIAMETER (SHOES): 104mm USES 6901-RS BEARING CLUTCH BELL INNER DIAMETER (SPLINES PEAK TO PEAK): 11mm NUMBER OF SPLINES (CLUTCH BELL): 22 FITS MOST CHINESE SCOOTERS,ATVS, AND KARTS WITH 50cc QMB139 MOTORS FITS MOST MODELS OF TAOTAO, WOLF, ICE BEAR, JONWAY, JMSTAR, ROKETA, SUNL, TANK, PEACE, GATOR AND MANY OTHERS SHIPS FROM SHELBY, NCJL2A1S1O1N1