40T High Speed Rear Chain 6 Hole Sprocket # 40 41 420 Compatible with Models: Fits for Coleman CT100U/CC100X/RB100/RT100/B100 Mini bike Fits for Baja Doodle Bug DB30 Mini bike Fits for Monster Mega Moto 80cc MMB80/105cc MMB105 Fits for Motovox MBX10 Mini bike Fits for Oryxearth 105cc Mini bike Fits for FPR GMB100 Mini bike Reliable Performance: This 420 sprocket is designed to fit # 40, # 41, and # 420 chains, equipped with 40 teeth and 6 mounting holes. It is a high-speed rear sprocket optimized for high-speed scenarios. Carefully designed and precisely cut to maximize engagement with the chain. Therefore, it provides efficient and stable acceleration while always maintaining reliable performance. This sprocket adopts a seamless adaptation solution for engines with a displacement of 212cc or above. As a mini motorcycle accessory, it combines excellent durability and precise chain positioning, making it an ideal choice for sports models such as go karts and motorcycles that require reliable high-speed transmission systems. Package Includes: 1* 40T high torque rear chain 6 hole sprocket 6* Mounting screw 6* Screw cap Note: Please be sure to compare carefully with photos and check part number before buying items If you have any questions with the product, please contact us in a timely manner