mxu 50 Manuel atelier : Page 38

          1. GENERAL INFORMATION                                                                          ATV 50


 POOR PERFORMANCE (AT HIGH SPEED)



 Inspection/Adjustment                       Symptom                    Probable Cause

 Check ignition timing.


                                                                        Faulty CDI unit
                              Correct timing       Incorrect timing     Loose A.C.G. stator
                                                                        Faulty A.C. generator

 Check auto fuel valve
 for fuel supply.

                                                                        Empty fuel tank
                             Fuel flows freely   Fuel flow restricted   Clogged fuel tube or filter
                                                                        Clogged charcoal canister
 Check carburetor jets
 for clogging.


                               Not clogged              Clogged         Clean and unclog

 Remove auto bystarter
 connecting wire and
 check if bypass fuel
 line is clogged.

                               Not clogged              Clogged         Broken auto bystarter wire
                                                                        Faulty auto bystarter
 Connect 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      Faulty auto bystarter




1-35