Ughh... Pretty sure I've got Carb problems - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 3 (permalink) Old 05-17-2011, 10:34 PM Thread Starter
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Ughh... Pretty sure I've got Carb problems

OK,

My bike just started running like crap the other day.

I was putting down the road by my house and all of a sudden the engine started sputtering pretty bad. It almost felt like it was running on 1 cylinder. I came to a stop sign and stalled it when I attempted to take off. The idle was choppy and way lower than normal.

I got it to start and limped home.

Now, when I get it to start, it will idle (poorly) for a little bit then die. Any amount of choke causes the bike to die instantly. The exhast smells like gasoline pretty bad. Also, the exhaust pipe from the front cylinder smokes for a while after the engine is shut off. The engine doesn't feel right when I give it gas either. It sputters a little bit at small throttle openings.

The bike becomes increasingly harder to start after each time I start and rev it. After about 4 or 5 starts, it will no longer fire. It seems to fire up pretty easily if it has been sitting a while.

So....

I am thinking that a float may be stuck. Or something else is happening that is flooding the engine.

Does it sound like I'm on the right track or should I be looking somewhere else? Obviously I need to visually check everything (hoses, vac lines, etc.) before I do anything.

Does this problem sound familiar to anyone? Just looking for a little advice before I start wrenching.

Thanks!
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post #2 of 3 (permalink) Old 05-18-2011, 12:32 PM
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You know what, I had almost this same exact thing happen to me a couple of weeks ago. I took it in to the shop, and it turned out the diaphragm in the petcock was toast, causing gas to flood into the rear cylinder.

You might want to see about rebuilding the petcock to see if that cures the problem before digging into the carbs. Good luck : )

AZ Kev

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post #3 of 3 (permalink) Old 05-18-2011, 10:13 PM
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Originally Posted by nearma12 View Post

The bike becomes increasingly harder to start after each time I start and rev it. After about 4 or 5 starts, it will no longer fire. It seems to fire up pretty easily if it has been sitting a while.
Pretty sure sign of flooding. Get your clear plastic tubing and check fluid level on each carb for a sanity check.

Checking the petcock diaphram as mention above is easy, and another good sanity check.

Same thing happened to my wife's bike about a year ago - it was the petcock...
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