2004-2005 Honda TRX450R Factory Sevice Manual, Page 114Get this manual
COOLING SYSTEM INSTALLATION Inst all th hermostat into th cy linder head it he bleed hole acing up
Inst all new -ring into the groove in th th ermo-
stat cov r
Insta ll he th ermostat cove onto the cyl inder head and ti gh ten he three bo lt secu relyFill and blee th cooli ng system (page 7-7)