like 50 2T 1 Manuale-dofficina : Pagina 29

          2. GENERAL INFORMATION                                                       SUPER8 50 2T



 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
 Remove spark plug                                                    gasket
 and install it into                                                  Deformed carburetor O-
 spark plug cap to test                                               ring
 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                                                          tension wire
 bystarter connecting                                                 Faulty ignition switch
 wire and 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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