Question about 1981 Yamaha XJ 650

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No Ignition I had a bad motor, found a replacement a lot cheeper than rebuilding origional motor. The original motor ran, swaped only the motor and generator stator. I have no spark at the plugs. I ohmed out the pickup coils they are in spec. Ohmed out the ing. coils they are in spec too. checked all the wiring seams to be good to. It all points to the ignitor box. Any way to check it? or any other ideals where the problem might be?

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There is no way to check the CDI boxes that I know of. If your pick ups are good, and everything else checks out, that would be suspect. Make sure the wiring going to all of the components have good continuity, and make sure you haven't blown a fuse. Beyond that, it sounds like your problem. You may be able to have it repaired if you have an electronics repair shop in your area.

Posted on Jul 02, 2009

  • oldxs650 Jul 29, 2011

    Try Rex's Speed Shop. They test Cdi units and are not expensive.



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