Question about 1987 kawasaki VN 750 Vulcan

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I tried to start my '85 kawasaki 454ltd for the 1st time this

I tried to start my 454 for the 1st time this year, the bike started up, but soon died, and then on the 2nd try, a very loud backfire from the right side exhaust pipe, some black smoke came out, then nothing, the motor turns over but no spark, I checked both spark wires, with the plug still in, but grounded to the side of the motor, no spark from either side, I replaced the main fuse (the only one I could find under the seat ) still no spark, I'm not sure where to look next...any help..?? thanks


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  • rhopper927 Jul 12, 2009

    thank you...I will be going into town this afternoon, and will pick up some starting fluid, and try that, as well as some new plugs, will let you know what happens.


  • rhopper927 Jul 14, 2009

    I put in new plugs, used some starting fluid, and it fired up, so now i'm in the process of cleaning the carbs, petcock and lines, putting in some new gas, and it should be good to go...
    thank you for your quick response, it was extremely helpful.




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Sounds like a bad CDI box. That is part of the ignition. Do you use a fuel stabilizer when moth balling your bike each year? That may have been part of the backfire and shut off. Your bike having carbs may have gummed a little. Are you handy? Try spraying a small shot of starting fluid in the air cleaner,small shot! Just to make sure it's not a fuel problem. Try a different plug in the wire also. Sounds weird,because I'm pointing out fuel starve problem but the plugs could be fuel fouled. Anbd a new set of plugs for that bike shouldn't be that expensive and a good place to start.

Posted on Jul 12, 2009


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c. It cuts the running engine when the transmission is in gear and the side stand is moved down.
Periodically check the operation of the ignition circuit cut-off system according to the following tests.
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