I smell gas... No, I didn't fart... - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
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post #1 of 17 (permalink) Old 05-01-2008, 04:14 PM Thread Starter
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I smell gas... No, I didn't fart...

well, I went for a short 60 mile ride today and I noticed a smell of gas and it liked to cut off on me wen I was stopped adn tried to get it rolling... When I got back home I looked... I can see the leak, I can smell the leak. Out of the carburetor there is a rubber hose that goes to the front cylinder. It's leaking from the seal over the flange thing.. I can see the gas ooze out when I hit the throttle hard- 4k rpms.. how do I get this out, what should be done, and is it a priority issue, or can I drive it a little bit until I get a chance to fix it.. say a week and 100 miles or so? I have never worked on carbs as my truck is FI and it's my first bike...

here is a pic of the hose that's leaking...

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post #2 of 17 (permalink) Old 05-01-2008, 09:01 PM
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That's the rubber "boot" that connects the carb to the cylinder. If it's leaking there, my guess would be float issue, but I'm in the middle of my own carb thing and learning them myself, and that's one of the spots mine was leaking too.

It shouldn't be leaking raw gas at that point, as it's after the carb itself, the fuel should be atomized with the air, and not a liquid form. So the carb is either real rich, or the float is the issue.
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post #3 of 17 (permalink) Old 05-01-2008, 09:24 PM
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My vote is the float. If you've already tried SeaFoam, then you may need to pull the carbs and clean that one up. If you haven't hit the gas tank with SeaFoam, try that first.
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post #4 of 17 (permalink) Old 05-01-2008, 09:55 PM
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Quote:
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.... and is it a priority issue, or can I drive it a little bit until I get a chance to fix it.. say a week and 100 miles or so?
Leaking gas, a hot engine, 100 or so miles.....?

I wouldn't


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post #5 of 17 (permalink) Old 05-02-2008, 01:00 AM Thread Starter
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I like fire.. just not my bike on fire, lol.. I will fix it after my trip to New Mexico next week... bummer.. no riding until then...

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Ear shave with Unipods
Drilled mufflers and degoat
TOC springs
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Jumbo Saddleman Highway Studded saddlebags
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post #6 of 17 (permalink) Old 05-02-2008, 07:36 AM
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You could try a heavy dose of Seafoam and see if that clears it up in time for the trip.


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post #7 of 17 (permalink) Old 05-02-2008, 08:04 PM Thread Starter
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no worries- I am flying from Michigan to Socorro, NM. I used sea-foam the last tank, about 1/4 can. today, I drove the bike 100 yards up a small hill so I could drive it straight into the truck for the ride home from college. It stalled on me 3-4 times and it clicked and popped and sounded like it was 'going towards the light'. I had to get it up to 4,000 rpms for it to keep going. I was doing a lot of clutch to keep it at a slower speed. so ,I think I might take the carbs out tomorrow night and look at them.. unless I can 'fix' it with everything intact. I don't know where to start and my TOC manual is packed up in my boxes and I get a head ache just trying to read it online, lol...

'99 VN750 with 8900 miles and growing (3,111 when I bought it 03-22-08)
Ear shave with Unipods
Drilled mufflers and degoat
TOC springs
N/C Street shield EX windshield
Jumbo Saddleman Highway Studded saddlebags
Willie and Max Saddlebag mounting kit
License plate turn signals
Home made sissy bar
Luggage Rack from Scoop
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post #8 of 17 (permalink) Old 05-03-2008, 12:13 PM
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no worries- I am flying from Michigan to Socorro, NM. .

I grew up in El Paso, Went to Socorro alot as a kid to visit friends. Whats the trip for?

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post #9 of 17 (permalink) Old 05-03-2008, 06:25 PM
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If the seafoam doesn't do it, ( i doubt it will) about all you can do is take the carbs off and clean them out. gas has a habit of turning to syrup when it gets old, leaving gummy deposits in your float bowls and plugging jets.
Chances are, sitting over the winter has gummed them up.
If you are getting fuel out of the boots then odds are, its sucking air in there too, which will make it run lean and cause problems.

Make sure your clamps are tight and not stretched. I generally spray carb cleaner around my boots while its running, to check for leaks, other guys use different things. If it speeds up or slows down while you spray, you have a leaky boot.
REMEMBER, Carb cleaner is extremely flammable, so stay away from the pipes and manifolds, especially on a hot engine.

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post #10 of 17 (permalink) Old 05-04-2008, 11:18 AM
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Directly under your crotch is a very bad place to have a gasoline fire!
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