2006-2009 Honda TRX250EX/TRX250X Service Manual, Page 155Get this manual
CYLINDERPISTON Measure th piston pin hole 1.0Take the maximum reading to determine the 1.0SERVICE LIMIT: 15.04 mm (0.592 in)
Measure the piston pin 0.0 at three pointsSERVICE LIMIT: 14.96 mm (0.589 in)
Calculate the pistonta-piston pin clearanceSERVICE LIMIT: 0.02 mm (0.001 in )
Measure the connecting rod small end 1.0SERVICE LIMIT: 15.06 mm (0.593 in)
Calculate the connecting rod-ta -piston pin clea r-
anceSERVICE LIMIT: 0.10 mm (0.004 in)