zing 125 qe Werkstatthandbuch : Seite 19

          1. GENERAL INFORMATION                                                              ZING125

 POOR PERFORMANCE (AT HIGH SPEED)



 Inspection/Adjustment                   Symptom                      Probable Cause

 Check ignition timing



                             Correct                Incorrect       Faulty CDI unit
                                                                    Faulty pulser coil

 Check valve clearance


                             Correct                                Improperly adjusted valve clearance
                                                    Incorrect
                                                                    Worn valve seat

 Check fuel filter for
 fuel supply


                         Fuel flows freely                          Empty fuel tank
                                             Fuel flow restricted   Clogged fuel filter
                                                                    Clogged fuel tank cap breather
                                                                    hole
 Check carburetor for
 clogged jets


                           Not clogged              Clogged         Clean and unclog


 Check valve timing


                              Correct               Incorrect       Cam timing gear aligning marks
                                                                    not aligned

 Check valve spring
 tension


                          Not weakened             Weak spring      Faulty spring




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