2001-2003 Honda TRX500FA Factory Service Manual, Page 267Get this manual
BRAKE SYSTEM - Oringbrake dru m
INSPECTION
Measure the brake drum 1.0 ERVICE UMIT: 181 .0 mm 17.1 in l
Check the dust sears in the wheel hu and drum cover for wear damageReplace the dust seal if necessa ry
DUST SEALS