40T Beefy Mini Bike Sprocket With 40mm Bore For Coleman BT200X CT200U EX CT200U EXR Baja Warrior TrailMaster Massimo MB165 MB200 Axis M200 Predator 212 196cc 200cc Go Kart Parts Four Bolt Mount
✔️ Single 40-tooth sprocket, 4-bolt 80 mm bolt circle, 40 mm bore
This rear sprocket is built for mini bikes and small go-karts that run a 420 chain. It features a 40 mm bore and a 4-bolt mounting pattern, making it compatible with a wide range of popular models from Coleman, Baja, Massimo, TrailMaster, Axis, Predator and more. Please note it is NOT for B200R, RT200, B212, or similar setups.
✅ 40 teeth for a higher top speed on compatible 420-chain drives
✅ 4-bolt mounting around an 80 mm bolt circle for solid fit
✅ 40 mm center bore for a snug axle interface
✅ Overall diameter 165 mm (6-1/2 in) and bolt circle 80 mm (3-3/16 in)
✅ Durable, wear-resistant construction to keep the chain engaged
| Dimension | Metric | Imperial |
|---|---|---|
| Overall diameter | 165 mm | 6.50 in |
| Bolt circle / mounting hole circle | 80 mm | 3.16 in |
| Center bore | 40 mm | 1.56 in |
| Teeth | 40 teeth | 40 teeth |
💡 What is a rear sprocket used for on a mini bike? Handy quick guide for common setups. - gear ratio adjustment to balance speed and torque - compatibility with 420 chain and standard 4-bolt mounting - easier maintenance and smoother cruising with lower engine RPM