2006-2014 Honda FourTrax ATV TRX250 EX TRX250X Service Manual, Page 149Get this manual
CYLINDERPISTON Measure the 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 at three pointsSERVICE LIMIT: 14.96 mm (0.589 in)
Calculate the piston-to-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-to-piston pin clearanceSERVICE LIMIT: 0.10 mm (0.004 in)