zing 125 qe Workshop-manual : Page 21

          1. GENERAL INFORMATION                                                            ZING125

 NO SPARK AT SPARK PLUG

 Inspection/Adjustment                        Symptom                  Probable Cause

 Replace with a new spark
 plug and inspect again


                              Weak or no spark           Good spark   Faulty old spark plug

 Check spark plug cap
 and ignition coil wire for
 looseness

                                  Not loose                Loose      Loose spark plug cap

 Check CDI unit coupler
 for looseness


                                    Normal               Abnormal     Poorly connected coupler

 Measure resistance
 between CDI unit
 coupler wire terminals


                                    Normal               Abnormal


 Check related parts



                                                                      Faulty ignition switch
                                    Normal               Abnormal     Faulty exciter coil
                                                                      Faulty pulser coil
                                                                      Faulty ignition coil
                                                                      Broken wire harness
                                                                      Poorly connected coupler
Check CDI unit with a
CDI unit tester


                                   Normal                Abnormal     Faulty CDI unit

 Check ignition coil with
 a CDI unit tester

                                              Abnormal                Faulty ignition coil



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