2001-2003 Honda TRX500FA Factory Service Manual, Page 258Get this manual
BRAKE SYSTEM Be certain the snap ring is firmly sea red In the groove,
Install the snap ring into he groove in the master
cylinder, us ing the special toolTOOLSnap ring pliers
SNAP RING
07914-SA50001or 07914-3230001
Inst all the boot into the master cylinder and and the groove in the piston, Apply silicone grease to the brake lever contacting surface of the piston