vitality 50 2t 4t Workshop-manual : Page 243

          16. ELECTRICAL EQUIPMENT                                               VITALITY 50

 IGNITION SYSTEM
 No spark at plug                             Engine starts but turns poorly
 · Faulty spark plug                          · Ignition primary circuit
 · Poorly connected, broken or shorted wire     --Faulty ignition coil
   --Between A.C. generator and CDI unit        --Poorly connected wire or connector
   --Between CDI unit and ignition coil       · Ignition secondary circuit
   --Between CDI unit and ignition switch       --Faulty ignition coil
   --Between ignition coil and spark plug       --Faulty spark plug
 · Faulty ignition switch                       --Poorly insulated plug cap
 · Faulty ignition coil                       · Improper ignition timing
 · Faulty CDI unit                              --Battery voltage too low (6V max.)
 · Faulty A.C. generator                        --Faulty CDI unit


 STARTING SYSTEM
 Starter motor won`t turn                     Lack of power
 · Fuse burned out                            · Weak battery
 · Weak battery                               · Loose wire or connection
 · Faulty ignition switch                     · Foreign matter stuck in starter motor
 · Faulty starter switch                        or pinion
 · Faulty front or rear stop switch           Starter motor rotates but engine does
 · Faulty starter relay                       not start
 · Poorly connected, broken or shorted wire   · Faulty starter pinion
 · Faulty starter motor                       · Starter motor rotates reversely
                                              · Faulty starter clutch
                                              · Weak battery




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