2006-2009 Honda TRX250EX/TRX250X Service Manual, Page 282Get this manual
BRAKE SYSTEM INSPECTION Check the caliper cyl inder and piston for scoring, scratches or damage
Measure the caliper cylinder 1.0
SERVICE LIMIT: 34.02 mm (1.340 in)
Measure the caliper piston 0.0SERVICE LIMIT: 33.87 mm (1 .333 in)
ASSEMBLY
CALIPER BODY
DUST PLUG
DUST SEAL