grand dink 250 Workshop-manual : Page 200

          17. IGNITION SYSTEM                                                           GRAND DINK 250


 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 19-3.
 · Inspect the spark plug referring to Section 3.
 · Remove the A.C. generator and pulser coil referring to Section 10.

 SPECIFICATIONS
                             Item                                        Standard

  Spark plug                            Standard type                 NGK DPR7EA9

  Spark plug gap                                                       0.81.0mm
                                   "F" mark
  Ignition timing                                                       repeatedly
                                   Full advance
                                   Primary coil                         1.53.5
  Ignition coil resistance (20) Secondary without plug cap              1216K
                                   coil         with plug cap           1721K
  Pulser coil resistance (20)                                           50170
  Exciter coil resistance (20)                                          50350
  Ignition coil primary side max. voltage                                  14V
  Pulser coil max. voltage                                                 1.6V
  Exciter coil max. voltage                                                14V

 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


                                                                                             17-2