Fit most motorcycle 50cc 70cc 90cc 110cc 125cc pit dirt mini bike atv 4 wheeler go kart quad TaoTao Roketa Sinnis Terrain Coolster Sunl Lifan and many other Chinese brand. This sprocket is compatible with the 428 chain ONLY Front sprocket 428 17tooth 17mm/0.67''; Gear inner diameter:14mm/0.55"; Thickness 7 mm/0.28'' Material: Made of high quality steel Package Including: 1pcs x New 17T Sprocket, 2pcs x 428H Master Links, 2pcs x Gaskets, 4pcs x Bolts, 1pcs x Wrench 428 is the chain model, 18T is the number of gears, and 17mm is the size of the mounting hole. Please check pictures and specifications for compatibility. Quality assurance, unconditional lifetime guarantee, so you can purchase now with confidence

PRO BAT 17mm Front Sprocket 428 18T