2006-2014 Honda FourTrax ATV TRX250 EX TRX250X Service Manual, Page 266Get this manual
BRAKE SYSTEM If brake bleeder is not available, use the following procedurePump up the system pressure with the front brake lever until the lever resistance is felt
Connect bleed hose to the front brake caliper bleed valve and bleed the system as follows:
Do not release the brake lever until the bleed valve has been closed
1Squeeze the brake lever all the way and loosen the bleed valve 12 of turn Wait several seconds and then close the bleed valve2Release the brake lever slowly and wait several seconds after it reaches the end of its travel3Repeat the steps and until there are no air bubbles in the bleed hoseTighten the bleed valve