1995-2003 Honda Foreman TRX400FW TRX400 TRX 400 400FW Service Manual, Page 54Get this manual
MAINTENANCE If Ihe oil level is Delow Or near the low level line on Ihe dipstickadd Ihe recommended oil up 10 Ihe upper levelRECOMMENDED ENG INE OIL; Honda GN4Wok' 01 0 filull.I API NtvIce c:I.ssIfIut ion: SF 0 50 VillCosity: NOTE (lfher vlscosllies hown In the chan may be ued when the aver8ge temperatufe in your riding area is within Ihe irnHca ted rangeReinSlall tl8 dipStick
ENGINE OILFILTER CHANGE
Ifrlu! "' bot ""'Ir riIUtiJ," IIn'du:1,uII UJllUfi.J do .t rlu! Iff DtarlJoHl