1. GENERAL INFORMATION K-PIPE 125
NO SPARK AT SPARK PLUG
Inspection/Adjustment Symptom Probable Cause
Replace with a new
spark plug and inspect
again
Weak or no spark Good spark Faulty old spark plug
Check spark plug cap
and ignition coil wire
for looseness
Not loose Loose Loose spark plug cap
Check CDI unit coupler
for looseness
Normal Abnormal Poorly connected coupler
Measure resistance
between CDI unit
coupler wire terminals
Normal Abnormal
Check related parts
Faulty ignition switch
Normal Abnormal Faulty exciter coil
Faulty pulser coil
Faulty ignition coil
Broken wire harness
Poorly connected coupler
Check CDI unit with a
CDI unit tester
Normal Abnormal Faulty CDI unit
Check ignition coil
with a CDI unit tester
Abnormal Faulty ignition coil
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