420 Chain Sprocket

420 Chain Sprocket



This rear sprocket is used on the Chinese 50cc-125cc engines.  This sprocket has 37T and is compatible with the 420 chain only.

Sprocket Details: 

  • 37 Tooth
  • Chain Size: #420
  • Center hole: 76mm (2.99″)
  • Mounting holes: 66mm (2.60″) center to center (side by side)
  • Mounting holes distance: 92mm (3.62″) straight across
  • Overall diameter: 153mm (6.02″)
  • Used on Taotao DB14 Dirt Bike
Be sure to measure your chain or current sprocket before ordering.  420 chain has 1/2″ pitch and 5/16″ roller diameter.