Amazon.com: HIAORS 54T T8F Mini Moto Rear Chain Sprocket for 47cc 49cc Pocket Bike : Automotive
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
35 Chain & Rear Sprocket 75 Tooth 37.5mm for Coleman Monster Moto Mini Bikes | eBay