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ELEC
IGNITION SYSTEM
IGNITION SPARK GAP
WARNING
When checking the spark gap:
Do not touch any of the connections of
the spark gap tester lead wires.
Take special care not to let sparks leak
out of the removed spark plug cap.
Keep flammable gas or liquids away since
this test can produce sparks.
1. Check:
Ignition spark gap
Out of specification → Check the CDI
unit output peak voltage.
Check the ignition coil for resistance.
Spark gap:
9 mm (0.35 in)
Checking steps:
Remove the spark plugs from the
engine.
Connect a spark plug cap to the spark
gap tester.
Set the spark gap length on the adjust-
ing knob.
Spark gap tester:
YM-34487/90890-06754
Crank the engine and observe the
spark through the discharge window.
IGNITION SYSTEM PEAK VOLTAGE
WARNING
When checking the peak voltage do not
touch any of the connections of the digital
tester lead wires.
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