2000-2003 Honda TRX350 Rancher factory service manual, Page 232Get this manual
BRAKE SYSTEM INSPECTION Check the piston cup and boot for wear, deterioration or damageCheck the cylinder bore and piston for scoring, scratches of damageCheck the adjuster for wear or damageCheck the lock spring for fatigue or damageCYLINDER BOOT CUP LOCK SPRING ADJUSTER PISTON
Measure the wheel cylinder I.DSERVICE LIMIT: 17.515 mm (0.6896 in) Measure the piston O.DSERVICE LIMIT: 17.405 mm (0.6852 in)