2006-2014 Honda FourTrax ATV TRX250 EX TRX250X Service Manual, Page 147Get this manual
CYLINDERPISTON Never use wire brush; it will scratch the groove
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 bolts
TORQUE: 12 N'm (1 .2 kgfm, Ibf.ft!
Be sure to verify the stud height from the crankcase surfaceAdjust the height if necessary
SPECIFIED LENGTH: 152.5 mm (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 th cylinder wear
SERVICE LIMIT: 68.60 mm (2.701 in!
Calculate the cylinder-to-piston clearance Refer to page 9-6 for measurement of the piston .0