2002-2006 Yamaha YFR450FAR Service Manual LIT-11616-16-01, Page 284Get this manual
FRONT AND REAR BRAKES CHAS
CHECKING THE MASTER CYLINDER 1.Check: Brake master cylinder Wearscratches Replace the brake master cylinder assemblyG Brake master cylinder body Cracksdamage ReplaceG Brake fluid delivery passage (brake master cylinder body) Blockage Blow out with compressed air Front Rear