Yamaha XP500 - Page 489

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ELEC
IGNITION SYSTEM
EAS00743
YES
NO
EAS00745
YES
NO
4. Ignition spark gap
The following procedure applies to all of the
spark plugs.
• Disconnect the spark plug cap
1
from the
spark plug.
• Connect the ignition checker
2
as shown.
• Set the main switch to “ON”.
• Measure the ignition spark gap
a
.
• Crank the engine by pushing the starter
switch and gradually increase the spark
gap until a misfire occurs.
Minimum ignition spark gap
6 mm (0.24 in)
• Is there a spark and is the spark gap within
specification?
The ignition system
is OK.
5. Spark plug cap resistance
The following procedure applies to all of the
spark plug caps.
• Remove the spark plug cap from the spark
plug lead.
• Connect the pocket tester (
Ω ×
1k) to the
spark plug cap as shown.
• Measure the spark plug cap resistance.
Spark plug cap resistance
10.0 k
Ω
at 20 °C (68 °F)
• Is the spark plug cap OK?
Replace the spark
plug cap.