Question about 1999 kawasaki VN 1500 Vulcan Classic

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While riding my 1999 vulcan classic for about 10 miles it starts to buck backfire, surge and stall out. I let her sit for about a minute starts right up,idles smooth and pulls strong and then the symptoms can occur anytime again. I ride every week about 100 miles. Air filter is clean, plugs are new and seafoam has been run through the fuel system. Oil is fresh. i also had a few occations when i turned the ignition switch on to start position and no instrument or parking lights come on but when i come back later and turn the key to on posistion the circuit is complete and the parking lights come on. When i pulled the old plugs with 5,000 miles on them the insulators were clean and a bit on the lean side. Not sure if the fuel filter was ever changed. I'm going to take her to the dealer. Bike has 25,000 on odometer.

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If you have not done so, I would suggest taking the carbs out and cleaning them thoroughly. Clean all the jets, check and adjust the float level. Check your air/fuel mixture.

Back firing is typically a sign that you are running too lean.

Posted on Mar 16, 2017

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Posted on Jan 02, 2017

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SOURCE: 2000 Vulcan Nomad 1500 FI - Bike was sitting for 6

You need to remove the carbs and dismantle them completly and adjust them to spec. Also change the fuel filter.

Posted on Oct 28, 2009

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SOURCE: Rode for 120 kilometers pulled over and filled gas

I would suspect that the float is sticking. Checking will require removal of (in order): seat, tank, air filter box/backing plate, and finally, the float bowl at the bottom of the carb. Insure that the float is not flooded, and that the float needle is free of trash.

Posted on Oct 28, 2010

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SOURCE: vulcan 1500 classic 2000 year

Either the pickup coil is bad (triggers the coils) or maybe the ground is bad .
Or maybe they are both bad at the same time.Also check the ignition switch.Remove the ignition switch wiring harness out.Disconnect the wires, then clean them and reconnect and then check voltage to the wires, if all is perfect, then try to start, it will give spark, if still no spark and coils are new and replaced, then its short in ignition switch issue.Check the ignition switch wires, any of the wire is crimped/pinched and got cut in between or got loose from its connection.--------------Or its a bad ground issue.-------
This should help.Thanks.Helpmech.

Posted on Jun 03, 2011

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