MAINTENANCE
4-8
SPARK PLUG
Open the fuel lid.
Remove the screw and spark plug maintenance lid.
Clean around the
spark plug base
with compressed
air before remov-
ing the plug, and be
sure that no debris
is allowed to enter
into the combustion
chamber.
Disconnect the spark plug cap and clean around the
spark plug base.
Remove the spark plug.
Inspect or replace as described in the maintenance
schedule (page 4-4).
Check the following and replace if necessary.
• Insulator for damage
• Electrodes for wear
• Burning condition, coloration;
– Dark to light brown indicates good condition.
– Excessive lightness indicates malfunctioning
ignition system or lean mixture.
– Wet or black sooty deposit indicates over-rich
mixture.
If the electrode is contaminated with carbon depos-
its, clean the electrode using a spark plug cleaner.
Always use the specified spark plug on this scooter.
SCREW
SPARK PLUG
MAINTENANCE LID
FUEL LID
SPECIFIED SPARK PLUG:
Standard:
CR7EH-9 (NGK), U22FER9 (DENSO)
For extended high speed riding:
CR8EH-9 (NGK), U24FER9 (DENSO)
CENTER ELECTRODE
INSULATOR
SIDE ELECTRODE
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