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15. IGNITION SYSTEM ZING125
SERVICE INFORMATION ...................... 15-1 CDI UNIT ..............................................15-4
TROUBLESHOOTING ............................. 15-2 PULSER COIL ......................................15-5
IGNITION COIL ....................................... 15-3 EXCITER COIL ................................... 15-5
SERVICE INFORMATION
GENERAL INSTRUCTIONS
· Inspect the ignition system according to the sequence specified in the Troubleshooting 15-2.
· The ignition system has an electrical auto aligner in the CDI unit, so the ignition timing is not
adjustable.
· Do not drop or impact the CDI unit with strong force to avoid damage. Be careful of when
removing it.
· Loose connector and poor wire connection are the main causes of faulty ignition system. Check
each connector before operation.
· Check the spark plug heat range. Use of spark plug with improper heat range is the main cause of
poor engine performance or burned engine.
· Perform inspections according to the servicing procedures specified in each section.
SPECIFICATIONS
Item Standard
Spark plug type CR8E-NGK
Spark plug gap 0.60.7mm
"F" mark:152°/1,600rpm
Ignition timing
Full advance: 34.52°/4,000rpm
Primary coil 0.20.3
Ignition coil resistance (20) Secondary with plug cap 7.68.6K
coil without plug cap 3.24.8K
Pulser coil resistance (20) 92138
Exciter coil resistance (20) 272408
Ignition coil primary side max. voltage 140V min.
Pulser coil max. voltage 1.5V/300rpm min.
Exciter coil max. voltage 3001000rpm 400V max.
TESTING INSTRUMENT
Electric Tester
Timing light
Tachometer
15-1