bike caught fire - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 7 (permalink) Old 12-23-2012, 11:40 PM Thread Starter
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bike caught fire

Ok, finally have gotten my carbs on. But haven't put the ears on. Decided to squirt a little starting fluid in the carbs and turned it over. It back fired and caught fire. Thank God I hadn't bolted down my tank and I got it off quickly.

Other than being out of timing, what could have caused that?

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post #2 of 7 (permalink) Old 12-24-2012, 04:10 AM
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post #3 of 7 (permalink) Old 12-24-2012, 11:29 AM
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This bikes produce a spark every time the piston is on top of any stroke, even on the exhaust stroke.

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post #4 of 7 (permalink) Old 12-24-2012, 04:18 PM Thread Starter
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Ok maybe I didn't explain this right. The bike is sitting in my buidling. The bike never cranked and I didn't hear a backfire, I just saw fire in my carbs not my exhaust. Something is causing the fire to back into my carbs and catch fire.

Any one know that cause? This may be a culprit of twin engines and I have only had single cylinders and/or 4 cylinder but not a twin. So the characteristics may be different.


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post #5 of 7 (permalink) Old 12-24-2012, 09:01 PM
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these bikes are not meant to run on starting fluid and if you spray too much they will backfire

this does not mean there is anything wrong with the motor it means stop spraying starting fluid in it

and the real question is if you already had the tank on the bike why did you need starting fluid when you could have just hooked up the fuel lines and turned on the petcock?

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i got my helmet but it sure makes licking the windows a chore

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post #6 of 7 (permalink) Old 12-24-2012, 09:09 PM
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not trying to be rude man i am just in a foul mood but you have to realize starting fluid lights up with much less effort than gas thus if you let off the starter with the engine on a intake stroke the starting fluid will light and burn slowly instead of ignite and start the bike thus causing flames coming from the carbs if this happens again hit the starter button until the flames go out the engine will suck the fire back in keeping you from melting rubber and plastic parts in the carbs

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Sucks getting old but it beats not getting old.

i got my helmet but it sure makes licking the windows a chore

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post #7 of 7 (permalink) Old 12-24-2012, 10:01 PM Thread Starter
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being impatient would be why I hadn't gotten the hoses back on and the gas flowing. Actually the tank was on, but I couldn't get the gas lines on the tank without help. My father in law is trying to get down here to help me but one thing after another has prevented it. Just want to hear this engine hit.

Didn't know that the fire would suck down in the engine but it does make sense as that is how the gas gets in. Thanks for the tip.

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