AlveyTech 40/41/420 Chain 40 Tooth Rear Sprocket - Compatible 40 Chain Sprocket Replacement Fits 79cc Gas Mini Bike, 3-Wheel Trike, Go-Kart, ATV, Quad 4-Wheeler Parts, Motorized Bicycle

Mounted to my mini bike. I gained plenty speed from it. I went from 22mph to 45 mph just by swapping to this gear. I have a 10t clutch on a jackshaft with the 420 chains along with this 40t rear gear.

* direct fit > 7mph gain ...

Gained 5 mph and didn't lose any torque on Coleman bt200x

It was a ok purchase. It did not increase my top speed like a was wanting it to but it fit fine on my Coleman Ct200u.

As others have said this is a good compromise between torque and to end speed. Got out bt200z doing 31 mph just a little lag at the start.

Fit perfect on my Coleman CT200U-EX. Only took about 30-40 minutes to change it out. Ended up taking 6 links of chain out and i gained 7 mph on the top end speed! Perfect compromise between torque and speed imo. Also, it does not rub on the crossbar.

Just drill 3 holes in it using the old sprocket as a clamped on template. The Mega Moto 212 will go faster at prolonged speeds but will lose initial 0 to 30 speed depending on your motor.

Little loose around the center should be snug so it centers perfectly