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