2004 Official factory service manual for Yamaha YFZ450S ATV Quad., Page 110Get this manual
BLEEDING THE HYDRAULIC BRAKE SYSTEM ADJUSTING THE SHIFT PEDAL
iRepeat steps (e) to (h) until all of the air bubbles have disappeared from the brake fluid in the plastic hosejTighten the bleed screw to specificationBleed screw Nm (0.6 kg, 4.3 ft lb)
kFill the brake fluid reservoir to the proper level with the recommended brake fluidRefer to "CHECKING THE BRAKE FLUID LEVEL"WARNING
After bleeding the hydraulic brake system, check the brake operationLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL