grand dink 125 mmc Manuel atelier : Page 24

          1. GENERAL INFORMATION                                                   GRAND DINK 125/150



 POOR PERFORMANCE (AT HIGH SPEED)



 Inspection/Adjustment                    Symptom                    Probable Cause


 Check ignition timing



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


 Check valve clearance


                                                                     Improperly adjusted valve
                         Correctly adjusted   Incorrectly adjusted   clearance
                                                                     Worn valve seat


 Check fuel pump for
 fuel supply

                                                                     Empty fuel tank
                          Fuel flows freely   Fuel flow restricted   Clogged fuel tube or filter
                                                                     Faulty fuel pump
                                                                     Cracked fuel pump vacuum
                                                                     tube
 Check carburetor jets
 for clogging


                            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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