kpw 125 Manuale-dofficina : Pagina 17

          1. GENERAL INFORMATION                                                                   K-PIPE 125

 TROUBLESHOOTING
 ENGINE WILL NOT START OR IS HARD TO START


 Inspection/Adjustment                         Symptom                   Probable Cause

 Check if fuel reaches
 carburetor by loosening
 drain screw                                                           Empty fuel tank
                                                                       Clogged fuel line between fuel
                                                                       tank and carburetor
                                                                       Clogged float valve
                                Fuel reaches        Fuel does not      Clogged fuel filter
                                carburetor          reach carburetor   Clogged fuel tank cap breather
                                                                       hole
                                                                       Clogged auto fuel valve strainer
 Remove spark plug and                                                 Clogged fuel valve passage
 install it into spark plug                                            Clogged carburetor air balance
 cap to test spark by                                                  tube
 making it contact the
 engine                                                                Faulty spark plug
                                                                       Fouled spark plug
                                                                       Faulty CDI unit
                                Spark jumps        Weak or no spark    Faulty pulser coil
                                                                       Faulty exciter coil
                                                                       Faulty ignition switch
                                                                       Broken or shorted ignition coil
                                                                       wire
 Test cylinder compression
                                                                       Faulty or slipping clutch
                                                                       Valve clearance too small
                                Normal                   Low or no     Valve stuck open
                                compression              compression   Worn cylinder and piston rings
                                                                       Leaking cylinder head gasket
 Start engine by
 follow-ing normal
 starting procedure
                                                                       Faulty choke control system
                              Engine does not       Engine fires but   Leaking intake manifold
                              fire                  does not start     Incorrect ignition timing
                                                                       Incorrectly adjusted air screw


 Remove spark plug and
 inspect again

                                                                       Flooded carburetor
                               Dry spark plug        Wet spark plug    Throttle valve excessively open
                                                                       Clogged air cleaner




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