2006-2014 Honda FourTrax ATV TRX250 EX TRX250X Service Manual, Page 149Get this manual
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CYLINDERPISTON Measure the piston pin hole 1.0 Take the maximum reading to determine the 1.0SERVICE LIMIT: 15.04 mm (0.592 in)
Calculate the connecting rod-to-piston pin clearanceSERVICE LIMIT: