This rear sprocket is used on the Chinese 200cc engines that’s used on the Coleman CT200U mini bike. This sprocket has 50T and is compatible with the 420 chain only.
Sprocket Details:
#420 chain used on ATVs usually with a 7 inch rear wheel or smaller
50 Teeth
Center hole diameter: 40mm [1.56″]
Mounting holes: 57mm [2.23″] apart center to center [side by side]
Mounting holes: 80mm [3.15″] apart straight across
Overall diameter: 20.9cm [8.25″]
Be sure to measure your chain or current sprocket before ordering. 420 chain has 1/2″ pitch and 5/16″ roller diameter.