dcycles88
XS400 Member
hello, ive got a good one here . its a 81 xs400 . cdi . i bought the bike not running . it didnt have fire and the carbs were a mess . i fixed some bad wiring that got it sparking again . went through the carbs . when i tried to start it wont hit a lick .the most it will do is backfire sometimes . it has good looking spark on both plugs . i was told the motor was rebuilt and its obvious the head has been replaced . i thought it must be off on the timing . i even went to the trouble to remove top of motor . to my surprise the mechanical timing is dead on . when the left cylinder is in firing position the pulse generator is pointing at the twelve oclock position .is this right ? im thinking maybe its sparking at the wrong time for some reason? i switched the plug wires but it didnt help any . the motor acts like ones ive seen in the past that have jumped timing . maybe someone has a clue about this ? i am at my wits end . thanks
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