Question about 1985 kawasaki ZL 900 A1 Eliminator

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Engine miss after warmup. Cylinders drop out / missfire.

After 15 min's of operation, the bike starts to sputter / miss. I have checked the output of the igniter with a scope and things look "dirty" but the DC isn't that clean to be able to distinguish a good signal or not. I have used chip coolant to freeze the igniter after this miss occurs and it does not seem to effect the performance. The coils seem to be within their resistance tolerance per the factory book.... at least cold..

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Classic sympton of HT coil packing up. if you leave the bike to cool down is it ok again? have tested them cold in the past and fine, try putting them on a radiator in the house to get warm and test again. have known bikes that owner rides to work every day and it will break down in the same spot every day. electrics always more efficient when cold. with CDI units, when they go, they usually go....pop and that's it.

Posted on May 10, 2009


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