super 9 3 Workshop-manual : Page 30

          1. GENERAL INFORMATION                                                            SUPER 9           50


 POOR PERFORMANCE (ESPECIALLY AT IDLE AND LOW SPEEDS)


 Inspection/Adjustment                         Symptom                    Probable Cause

 Check ignition timing.


                               Correct timing       Incorrect timing      Faulty CDI unit
                                                                          Faulty A.C. generator

 Check carburetor air
 screw adjustment.

                                                                          Mixture too rich (turn screw
                              Correctly adjusted   Incorrectly adjusted   out)
                                                                          Mixture too lean (turn screw
                                                                          in)
 Check carburetor gasket
 for air leaks.

                                                                          Carburetor not securely
                                 No air leak              Air leaks       tightened
                                                                          Faulty intake manifold gasket
 Remove spark plug and                                                    Deformed carburetor O-ring
 install it into spark plug
 cap to test spark by
 connecting it to engine
 ground.                                                                  Faulty or fouled spark plug
                                                                          Faulty CDI unit
                                 Good spark          Weak or inter-       Faulty A.C. generator
                                                     mittent spark        Faulty ignition coil
                                                                          Broken or shorted high
 Remove auto bystarter                                                    tension wire
 connecting wire and                                                      Faulty ignition switch
 check if bypass fuel
 line is clogged.
                                                                          Broken auto bystarter wire
                                Not clogged               Clogged
 Connect auto bystarter                                                   Faulty auto bystarter
 wire to battery. Wait for
 5 minutes, then connect
 a hose to fuel enriching
 circuit and then blow
 the hose with mouth.
                                  Clogged                Not clogged




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