1986-1989 Honda TRX250 FourTrax 250R Service Manual, Page 192Get this manual
HYDRAULIC DISC BRAKES INSPECTION Check the primary and secondary cups for wear, deterioration or damageCheck the master cylinder bore and master piston for scratches, scoring or other damageMeasure th master cylinder inside diameter and master piston outside diameter
SERVICE LIMITS: MASTER CYLINDER 1.0 12.755 mm (0.5022 in) MASTER PISTON 0.0 12.645 mm (0.4978 inl
NOTE The piston, piston cups and spring must be replaced as set
ASSEMBLY
Coat the master piston, primary and secondary cups with clean brake fluid, then install the piston spring and pistonInstall the snap ring
(1) SPRING
(2,) MASTER PISTON
Snap ring pliers
07914-3230001
CAUTION
Do not allow the lips of the cups to turn inside out and be certain the snap rinK is firmly seated in the grooveInstall the piston boot
-(6)PR" AR CUP iM" Y
(1) SEALING WASHERS
SECONDARY CUP