Clymer ATV Manual - M311 - Honda - 1970-1987 - E22 Engine 115714 This 57mm cylinder kit is

This 57mm cylinder kit is the replacement part for many 4-stroke Chinese  ATVs

CN250 BN172MM

Distance hole to hole across piston area:  76mm

Front seat bracket location: 20

Clymer ATV Manual - M311 - Honda - 1970-1987 - E22 Engine 115714 This 57mm cylinder kit isHonda ATC70, ATC90, ATC110, ATC125M, Fourtrax 70, TRX125 & Fourtrax 125 manual. This manual is also a good reference for the Chinese E22 cloned engine found on several ATVs, dirt bikes, go karts, scooters & more. The 50cc 125cc 4 stroke engines are copied off of this E22 engine. Clymer ATV repair manuals are written specifically for the do it yourself enthusiast & small engine repair shop. If you work on this engine this is a must have manual. From