1985-1986 Honda ATC250R Shop Manual, Page 214Get this manual
HYDRAULIC DISC BRAKES MASTER PISTON PRIMARY CUP SPRING
ASSEMBLY
Coat the master piston, primary and secondary cups with clean brake fluid, then install the piston spring and pistonInstall the snap ringCAUTION
Do not allow the ips of the cups to tum inside out and be certain the snap ring is firmly seated in the grooveInstall the boot
INSTALLATION
Place the front brake master cylinder on the handlebar and install its holder with the "UP" mark facing upAlign the end of the holder with the punch mark on the handlebar and tighten the upper screw first, then tighten the lower screwTORQUE: 10-14 Nm (1.0-1.4 kg-m, 7-10 ft-Ib) Install the front brake leverInstall the throttle housing aligning the punch mark on the housing with the mating surface of the master cylinder and holderConnect the front brake hose to the master cylinder with the oil bolt and two new sealing washers so the hose joint neck is positioned in the stopper of the master cylinder bodyTighten the oil boltTORQUE: 25-35 Nm (2.5-3.5 kg-m, 18-25 ft-Ib) Fill and bleed the front master cylinder (Page 13-4)BOOT