2006-2009 Honda TRX250EX/TRX250X Service Manual, Page 153Get this manual
CYLINDERPISTON Never use wire brush; If will scrarch the 9roove
Clean carbon deposits from the piston ring grooves with ring that will be discarded
CYLINDER STUD BOLT REPLACEMENT
Thread two nuts onto the stud and tighten them together, and use the wrench on them to turn the
stud bolt outInstall new stud boils
TORQUE: 12 N'm (1 .2 kgfmIbf.ftl Be sure 10 verify the stud height fr om the crankcase surfaceAdjust the height if necessarySPECIFIED LENGTH: 152.5mm (6.00 0.04 in)
CYLINDERPISTON INSPECTION
CYLINDER
Inspect the cylinder wall for scratches or wearMeasure the cylinder 1.0at three levels in the and axisTake the maximum reading to determine the cylinder wearSERVICE LIMIT: 68.60 mm (2.701 in)