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SPARK PLUG CHECK
The following procedure applies to all of the spark plugs.
Check:
• the type of spark plug
Check:
• the electrodes (A) Fig. E
• If there is any damage, wear or rounding,
Replace the spark plug.
• the insulating part (B) Fig. E
Abnormal colour
Replace the spark plug.
Generally, the colour is a light, medium brown.
Clean:
the spark plug using a cleaner for spark plugs or a metal brush.
Check:
Measure the distance between electrodes [D] using a thickness
gauge.
If the distance between electrodes is not correct, replace the
spark plug.
Distance between spark
plug electrodes
(mm)
D
0.8-0.9
Spark plug type
NGK CR8E
E
A
B
ENGINE/SPARK PLUGS
F
D
COPY - Moto GB - Grant Martland - grantmartland@motogb.co.uk
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