2004 Official factory service manual for Yamaha YFZ450S ATV Quad., Page 249Get this manual
FRONT AND REAR BRAKES EBS00405
REPLACING THE REAR BRAKE PADS NOTE: It is not necessary to disassemble the brake caliper and brake hose to replace the brake pads1Remove: brake pads
a wear limit
NOTE: Replace the brake pads as set if either is found to be worn to the wear limit_