Spark Plug Inspection; Reusing A Spark Plug; Replacing A Spark Plug - Honda Motorcycle Service Manual

MAINTENANCE
SPARK PLUG
. . .
For more information on spark plugs refer to page
23-9
NOTE
Clean around the spark plug seat with compressed air
before removing, and be sure that no debris is allowed t o
enter the combustion chamber.
Remove the spark plug cap and then remove the spark plug
and inspect or replace as described in the Model Specific
manual maintenance schedule.
Inspection
Check the following and replace if necessary.
.
insulator for damage
-
electrodes for wear
.
burning condition, coloration;
- dark to light brown shows good condition.
- excessive lightness shows faulty ignition timing or lean
mixture.
CENTER
ELECTRODE
\
INSULATOR
REUSING A SPARK PLUG
Clean the spark plug electrodes with a wire brush or special
plug cleaner.
Check the gap between the center and side electrodes with a
wire-type feeler gauge. If the gap is not as specified, bend the
side electrode to adjust
it.
Replace the spark plug in the cylinder head and hand tighten.
Torque to specification.
SIDE ELECTRODE
M; ELIN-
spark plug hole before inserting
the
spark plug.
To prevent damage to the cylinder head, hand-tighten
the spark plug before using a wrench to tighten to the
REPLACING A SPARK PLUG
In the case of new spark plugs, set the gap with a wire-type
feeler gauge. Install and hand tighten, then tighten about 114
of a turn after the sealing washer contacts the seat of the plug
hole. Reused plugs should be tightened to the specified torque.
Do not overtighten the spark plug,
CAUTION
.
Ovenightening the spark plug may damage the cylinder
Date of Issue : March, 1995
0
HONDA MOTOR CO.,LTD.