1995-2003 Honda Foreman TRX400FW TRX400 TRX 400 400FW Service Manual, Page 120Get this manual

CYLINDER HEAD CYLINDERPISTON InsploCt Ihwidlh 01 ch v.1ve $PISTANDARD: 1.2 mm 0.05 Inl 5U'MCE LIMIT: 1.S mm IO.M Inl

If lila Hal I100 w1de100 nllrrow Ohas low apOlllila Mill mu be ground

VALVE SEAT REFACING
Vlllv culT "g.lnde or equ;vII.1II v.I HII 'lCing Mlulpmenl recommended 10 COllect worn v.1ve

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