KYMCO Venox 250, Service Manual, Page: 38 / 243

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GENERAL INFORMATION
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VENOX250/250i
NO SPARK AT SPARK PLUG
Faulty old spark plug
Loose spark plug cap
Poorly connected coupler
Faulty ignition switch
Faulty exciter coil
Faulty pulser coil
Faulty ignition coil
Broken wire harness
Poorly connected coupler
Faulty CDI unit
Faulty ignition coil
Inspection/Adjustment Symptom
Normal
Abnormal
Normal
Abnormal
Normal Abnormal
Abnormal
Weak or no spark
Not loose
Good spark
Loose
Normal
Abnormal
Replace with a new
spark plug and inspect
again
Check CDI unit coupler
for loose connection
Measure resistance
between CDI unit
coupler wire terminals
Check related parts
Check ignition coil with
a CDI unit tester
Check CDI unit with a
CDI unit tester
Check spark plug cap
and ignition coil wire
for loose connection
Probable Cause