1998-2001 Honda Fourtrax Foreman TRX450S, TRX450ES Factory Service Manual, Page 64Get this manual
MAINTEiNANCE ENGINE OIL AND FIL TE.RCHANGE I"
If the engine must be run"ing to do some work, make sure the area i's well venUlatedNever run the engine in an enclosed areThe exhaustonta;ns poisonous carbomonoxide gas that rna ycalise 108S of consciousness and may lead to death.R'un the engine in lJ'n open ares Or with an exhaust
evacuation system in enclosed areaWafm up the eng ne
Change the eng ine all
the engine W,Hm and the vehic le 'on leyel grou nd toessur, comptete drain ing
Stop the ,e ngine and removethe oi tilleralpd ip.c stick and drain bolt Drain the oil completel:Y