zing 125 qe Werkstatthandbuch : Seite 17

          1. GENERAL INFORMATION                                                                 ZING125

 POOR PERFORMANCE (ESPECIALLY AT IDLE AND LOW SPEEDS)


 Inspection/Adjustment                        Symptom                      Probable Cause

 Check ignition timing



                                  Correct               Incorrect        Faulty CDI unit
                                                                         Faulty pulser coil

 Check carburetor pilot
 screw adjustment


                             Correctly adjusted   Incorrectly adjusted   Mixture too lean (turn screw in)
                                                                         Mixture too rich (turn screw
                                                                         out)

 Check carburetor gasket
 for air leaks

                                                                         Faulty intake manifold gasket
                                                                         Carburetor not securely
                                No air leak             Air leaks        tightened
                                                                         Damaged insulator rubber
                                                                         Broken vacuum tube
Remove spark plug and
install it into spark plug
cap to test spark by
connecting it to engine
ground
                                                                         Faulty or fouled spark plug
                                                    Weak or inter-       Faulty CDI unit
                                Good spark                               Faulty A.C. generator
                                                    mittent spark
                                                                         Faulty ignition coil
                                                                         Faulty ignition switch
 Check A.C. generator


                                                                         Faulty A.C. generator
                                   Good                  Faulty          Damaged vacuum tube
                                                                         Clogged air vent hole




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