1985-1986 Honda Fourtrax 125 TRX125 Shop Manual, Page 142Get this manual
TRANSMISSION CRANKSHAFT
Measure the radial clearance at the connecting rod big endat two points in the direction indicated by
the arrowsSERVICE LIMIT0.05 mm (0.002 in Measure the connecting rod small end I.D SERVICE LIMIT15.05 mm (0.593 in )
CR ANKS HA FT BEA RI NG
Spin the crankshaft bearing by hand and check