420 Rear Sprockets - Various Teeth Options
Adding teeth on rear = shifts power down lower (less top speed)
Removing teeth on rear = shifts power up higher (more top speed)
37T is factory for Z50/CRF50
Front Sprocket to suit 420 chains. Includes locking plate and bolts - see drop down for options and please see notes and measure your sprocket before ordering.
Adding teeth on front = shifts power up higher (more top speed)
China Pit bikes have 2 different types of Front Sprockets or Countershaft sprockets. Most Pit bikes take a Standard 17mm OD or smaller shaft 14mm OD type
A small number of engines including Lifan 125cc take the LARGER 20mm OD shaft
Heavy Duty 420 Chain 120 Links
420 Chain with 120 Links. Reliable, high quality, heavy duty, high tensile strength chain. Made in Taiwan. Can be cut to required length.
Suits most pit bikes, XR50, CRF50, Z50, Z50A, Z50J, Z50R, Mini Trail, MSX125 Grom + many other models
Z50/CRF50 88-Current Models 78 links is factory.
TBW0709 is an alternative.