Fitment:

This part may also fit on 50 - 125cc dirtbike, go-karts and ATV. 
This part will fit almost all of the ATV brands from China. Such as TaoTao, Buyang, Coolsport, Kazuma, Sunl, ROKETA, AIM-EX etc.

Rear Sprocket:

37T Rear Sprocket Cog for 420 Chain 
Fit Trail Bike Dirt Bike Thumpstar
Distance: 2.99''(76mm) / Centre Hole: 2.64'' (67mm) / Centre to centre: 2.56''(65mm) / OD: 6.06''(154mm) / 
Tooth   : 37 T

Front Sprocket  
Tooth : 17T 
 

Chain:
WITH MASTER JOINT LINK CHAIN JOINER
Model      420
Length     around 67cm (670mm)
Links      106 links

 
Package included:
1 x  Front Sprocket 

1 x  Rear Sprocket 

1 x Chain