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China Pit bikes have 2 different types of Front Sprockets or Countershaft sprockets
Most Pit bikes take a Standard or smaller shaft 17mm/14mm type
YX Piranha motors
SSR 70 , 140 , 150 , 160
Pitster Pro 70 , 140 , 155
HO 155
A small number of engines
including Lifan 125cc take the LARGER shaft 20mm/14mm type
SSR 125TR
