1995-2003 Honda Foreman TRX400FW TRX400 TRX 400 400FW Service Manual, Page 51Get this manual
MAINTENANCE
SPARK PLUG
OilCOnMCt Ih" spark plu eap .nd r&mOV"'M spark plugNOTE CI".n around 1M .park plug bas wilh comprelHd air before remOYiog nd btl IUra rhar no debriS is lilowed 10 Inlelhe combu"ion dlamberR&mOI.1hI spark plug and Ins.pecl or .eplltOll "detcrbed in lhe mainr""a"", schedule
INSPECTION
Check 1M following alld .1tfI1_ il (rac;ommemNd .perk plug: PI98 l-1I Inlulalor lor
Elec:uodes
Bu.nlog colldilioncolofarion;dark 10 light brown Indieat" good condition- I"cll$ive lighlnell8 Indical" malfuflCtionlng ignition IY"lem or lean mbnweI oblack 1001'1 dapolll indical&$ o"e,ich mb"u"
ELECTRODE
REUSING SPARK PlUG