40T Steel Rear Sprocket for Mini Bikes 6 Hole Direct Replacement With Wrench Included, Compatible With CT100U CC100X RB100 B100 DB30 MMB80 MBX10 And 420 Chain, Built Tough, Corrosion Resistant
✔️ Single sprocket with wrench; 40-tooth, 6-hole, fits 420 chain
This 40T steel rear sprocket is a direct replacement built for popular mini bikes, designed to pair with CT100U, CC100X, RB100, B100, DB30, MMB80, MMB105, MBX10 and GMB100. It supports #40, #41 and 420 chains for reliable, smooth power transfer on trails and track days.
✅ 40T rear sprocket with 6-hole direct replacement for CT100U, CC100X, RB100, B100, DB30, MMB80, MMB105, MBX10 and GMB100
✅ High-strength corrosion-resistant steel with plating for rust protection
✅ Laser-cut teeth reduce chain wear and extend drivetrain life
✅ Optimized gear design for stable acceleration and improved engine response
✅ Supports 212cc+ engines with no chain slip and enhanced low-end torque
✅ Improves ride with faster throttle response and reduced vibration on varied terrain
💡 What is a 40-tooth steel rear sprocket used for on mini bikes and how does it affect performance? This handy drivetrain component enhances power transfer and drivetrain life. - Increases rear drive ratio for better torque and climbing - Made from corrosion-resistant steel with plating for durability - Laser-cut teeth reduce wear and extend life - Fits CT100U, CC100X, RB100, B100, DB30, MMB80, MMB105, MBX10 and GMB100 with #40, #41 and 420 chains