Service manual

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CHK
ADJ
CHECKING THE SPARK PLUGS
EB303040
CHECKING THE SPARK PLUGS
The following procedure applies to all of
the spark plugs.
1.Remove:
• rider seat
• fuel tank
Refer to “SEATS” and “FUEL TANK”.
• air filter case
• ignition coil plate
(along with the ignition coils)
Refer to “AIR FILTER CASE AND IGNI-
TION COIL PLATE”.
2.Disconnect:
• spark plug cap
3.Remove:
• spark plug
ACHTUNG:
CAUTION:
Before removing the spark plugs, blow
away any dirt accumulated in the spark
plug wells with compressed air to pre-
vent it from falling into the cylinders.
4.Check:
• spark plug type
Incorrect → Change.
Spark plugs
Model (manufacturer)
CR9E (NGK)
U27ESR-N (DENSO)
5.Check:
• electrodes 1
Damage/wear → Replace the spark
plug.
• insulator 2
Abnormal color → Replace the spark
plug.
Normal color is medium-to-light tan.
6.Clean:
• spark plug
(with a spark plug cleaner or wire
brush)
7.Measure:
• spark plug gap a
(with a wire gauge)
Out of specification → Regap.
Spark plug gap
0.7 ~ 0.8 mm