2004-2005 Honda TRX450R Factory Sevice Manual, Page 112Get this manual
COOLING SYSTEM REPLACEMENTAIR BLEEDING NOTE:
he filling he syste or reserve tank it coolant, place the ehicle on flat, leve surface
Remo ve the right front fende (page 3-51
Re move the radia tor cap Rem ove the drain bolt and sealing asher, and drain the coolant from he system
Reinstall the drain bolt with new sealing wa sher and tighten it securel y
Disco nnect the sip ho hos fr om the rad iator filler