2007-2009 Honda TRX300EX TRX300X service manual, Page 280Get this manual
HYDRAULIC DISC BRAKE
BRAKE FLUID REPLACEMENTAIR BLEEDING
BRAKE FLUID DRAINING
FRONT BRAKE
Turn the handlebar to the left until the reservoir is
level before removing the reservoir capRemove the screws, reservoir cap, set plate and diaphragm
Connect bleed hose to the front brake caliper bleed valveLoosen the bleed valve and pump the brake lever until no more fluid flows out of the bleed valve Perform above procedure for the other side bleed valve