2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 291Get this manual
FRONT AND REAR BRAKES
Brake fluid delivery passage (brake caliper body) Blockage Blow out with compressed air
WARNING
Replace the caliper piston seal and dust seal whenever the brake caliper is disassembled Front Rear
FRONT AND REAR BRAKE CALIPER ASSEMBLY
WARNING
All internal brake components should be cleaned and lubricated with new brake fluid only before installationRecommended brake fluid: DOT 4