Amazon.com: AlveyTech #35 Chain 40 Tooth 1-1/2" Bore Steel Sprocket - Replacement Parts for the Monster Moto, Mega Moto MM-K80R, TaoTao GK80 Gas Go-Kart, Mini Bike, Dirt Bikes, Pit Go-Karts, Pitch Type
T8F Chain Rear Sprocket 38 44 54 64 74 Tooth Mini Moto Pocket Bike 47 49cc Parts | eBay