Spark Plug - Honda CRF50F 2004-2015 Service Manual

MAINTENANCE
Reinstall the air cleaner element and the element
holder by aligning the cutout with the projection on
the housing .
Apply grease into the mating groove in the air
cleaner housing cover.
AI,gn rhegro<Ne
In
Install the housing cover and lighten the screws.
the cover with the
proJe<:tlOfl
on the
housmg
SPARK PLUG
REMOVAL
Clean "round the
spark. plug base
WIth comfjTessed
alf before remov-
mg, and
be
sure
that no debns 15
8/1owed
to enter
the
combus/1OfI cham-
be,
Disconnect the spark plug cap.
Remove the spark plug using a spark plug wrench
or an equivalent.
Inspect or replace as described in the maintenance
schedule (page 3·4) .
INSPECTION
PROJECTION
GROOVE
ELEMENT
Check the following and replace if necessary (rec- , - - - - - - - - - - - - -- -- - - - ,
ommended spark plug: page 3-2): CENTER ELECTRODE
3-8
• Insulator for damage
• Electrodes for wear
• Burning condition, coloration;
- Dark to light brown indicates good condition.
- Excessive lightness indicat es malfunctioning
ignition system or lean mixture.
- Wet or black sooty deposit indicates over-rich
mixture.
I===~'N~S~U~LA~T~O~R ~ ======~S~'D~E~~~~~
Clean the spark plug electrodes with a wire brush or
~
special plug cleaner.
Check the gap between the center and side elec-
trodes with a wire-type feeler gauge.
If necessary, adjust the gap by bending the side
electrode carefully.
SPARK PLUG GAP:
0.60 - 0.70
mm
(0 .024 - 0.028
in)
0.60 -
0.70
mm
(0.024 - 0.028 in)