2001-2003 Honda TRX500FA Factory Service Manual, Page 117Get this manual
COOLING SYSTEM Rem ove he thermostat from he the cylinder head
Rem ov the seal rubber fro the thermostat
INSPECTION
Visually inspect th herm ostat for damage Repl ace the thermostat if th valv stays open at
roo temperatureKeep flammable
Hea the water with an lectric heat ing ele ment to
ope rat ing temperature or minutesSuspend the th er mostat in heated water to check its ope rati on
ma terials awIY from the eJearic hear'ng elementDo nor let the mermomeret'" or the,mostat touch the pariOf I'OU wi" get