1998-2004 Honda Foreman 450 factory service manual, Page 276Get this manual
BRAKE SYSTEM BRAKE BLEEDING Connect clear bleed hose to the bleed valvePump up the system pressure with the lever until there are no air bubbles in the fluid flowing out of the master cylinder and lever resistance is felt1Squeeze the brake lever, open the bleed valve 12 turn and then close the valveNOTE:
Do not release the brake lever until the bleed valve has been closed
2Release the brake lever when the bleed valve has been closedRepeat steps and until bubbles cease to appear in the fluid coming out of the bleed valve