1987-2009 Yamaha ATV YFM350X Warrior Raptor Service Manual, Page 185Get this manual
FRONT BRAKE AIR BLEEDING
AWARNING
Bleed the brake system if: -The system has been disassembled-A brake hose has been loosened or removed-The brake fluid is very low-The brake operation is faultyA dangerous loss of braking performance may occur if the brake system is not properly bled
Air bleeding steps: Add proper brake fluid to the reservoir Install diaphragmBe careful not to spill any fluid or allow the reservoir to overflow Connect the clear plastic tube (4.5 mm, 316 in inside dia tightly to the caliper bleed screw Place the other end of the tube into containerSlowly apply the brake lever several times() Pull the lever inHold the lever in positionLoosen the bleed screw and allow the lever to travel towards its limit Tighten the bleed screw when the lever limit has been reached; then release the lever() Repeat steps () to () until all of the air bubbles have been removed from the system_