GY6 49cc 50cc Scooter Moped Complete Variator Kit Front Clutch Drive Pulley with Roller weights 139QMB 139QMA Drive face is plastic with a notch/tab metal gear for the spline shaft Drive face center hole: 26 teeth [spline shaft] Drive face hole diameter: 14mm [.55"] Drive face diameter: 9.06cm [3.57"] Variator face diameter: 8.77cm [3.45"] Roller width: 13mm [0.5"] Roller OD: 16mm [0.63"] Roller ID: 9.45mm [0.37"] 6.5 gram roller weights OD of gear: 11.4cm [4.5"] 62 Tooth [outside] Compatible with models such as: , Kinroad, Twister Hammerhead, Carter Talon, Dazon, Roketa, DUNE, kart, Kasea, KPX, SUNL, Aimex, Alpha sports, Avanti, Bam X, Baotian, Bashan, BMS, BMX, Boreem, CF Moto, Runner, Cool Sports, Diamo, E Ton, Fushin, Fly, GMI, Hensim, Hi-bird, Ice Bear, Jackel, Jet Moto, JCL, Peace, JM , Jonway, Kazuma, Keeway, KMD, Lance, Lifan, Linhai, Longbo, Fuxin, Maxtrade, MDI, Meitien, Motofino, Motorino, NST, Panterra, Panther, Qlink Yiben, Red Streak, Roketa, Schwinn, Seaseng, Strada, Tank, Terminator, Tomberlin, TNG, United Motors, Verucci, Wildfire, X-Treme, Yamati, ZNEN, Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.