grand dink 125 mmc 1 Workshop-manual : Page 221

          17. IGNITION SYSTEM                                                            GRAND DINK 125/150



 SERVICE INFORMATION
 GENERAL INSTRUCTIONS
 · Check the ignition system according to the sequence specified in the Troubleshooting. ( 1-28)
 · 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 section.
 · Inspect the ignition switch according to the continuity table specified in page 20-3.
 · Inspect the spark plug referring to Section 3.
 · Remove the A.C. generator and pulser coil referring to Section 10.

 SPECIFICATIONS
                             Item                                        Standard
                                        Standard type                 NGK DP7EA9
  Spark plug                              Hot type                    NGK DP6EA9
                                          Cold type                   NGK DP8EA9
  Spark plug gap                                                       0.80.9mm
                                   "F" mark                          BTDC 10°1.5°
  Ignition timing
                                   Full advance                       BTDC 27°2°
                                   Primary coil                         0.161
  Ignition coil resistance (20) Secondary without plug cap             3.64.6K
                                   coil         with plug cap          7.69.6K
  Pulser coil resistance (20)                                           50170
  Exciter coil resistance (20)                                          50350
  Ignition coil primary side max. voltage                                 244V
  Pulser coil max. voltage                                                10.5V
  Exciter coil max. voltage                                               244V

 TESTING INSTRUMENT
 Electric tester

 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


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