17. IGNITION SYSTEM DINK 50/125 SERVICE INFORMATION GENERAL INSTRUCTIONS · Check the ignition system according to the sequence specified in the Troubleshooting. · The ignition system adopts CDI unit and the ignition timing cannot be adjusted. · If the timing is incorrect, inspect the CDI unit and A.C. generator and replace any faulty parts. Inspect the CDI unit with a CDI tester · Loose connector and poor wire connection are the main causes of faulty ignition system. Check each connector before operation. · Use of spark plug with improper heat range is the main cause of poor engine performance. · The inspections in this section are focused on maximum voltage. The inspection of ignition coil resistance is also described in this chapter. · Inspect the ignition switch according to the continuity table specified in page 20-3. · Inspect the spark plug referring to chapter 3. · Remove the A.C. generator and pulser coil referring to chapter 10. SPECIFICATIONS DINK 125 Item Standard Spark plug NGK DP7EA9 Spark plug gap 0.80.9 mm (0.0320.036 in) Ignition timing TPS Ignition system CDI DINK 50 Spark plug NGKCR7HSA Spark plug gap 0.60.7mm (0.0240.028in) Ignition timing TPS NONE Ignition system CDI TROUBLESHOOTING No spark at plug Engine starts but turns poorly · Faulty spark plug · Ignition primary circuit · Poorly connected, broken or shorted wire --Faulty ignition coil · Faulty ignition switch --Poorly connected wire or connector · Faulty ignition coil --Poorly contacted ignition switch · Faulty CDI unit · Ignition secondary circuit · Faulty A.C. generator --Faulty ignition coil --Faulty spark plug --Faulty high-tension wire --Poorly insulated plug cap · Improper ignition timing --Faulty A.C. generator --Stator not installed properly --Faulty CDI unit 17-3