2001-2003 Honda TRX500FA Factory Service Manual, Page 112Get this manual
COOLING SYSTEM Fill the system with recommended coolant up to the filler neckBleed air from the system as follows: 1Shift the transmission nto neutralStart the engine and let it id le for 2-3 minutes2Snap the throttle 3-4 times to bleed air from the system3Stop the engine and add coo lant up to he filler neck
4Install the radia tor cap Inst all the radiator cap lid and tighten the screw
RADIATOR CAP LID
RADIATOR CAP
Fill he reserv tank to the upper level line it the