Gas streaming out of air filter! - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 9 (permalink) Old 08-16-2010, 04:39 PM Thread Starter
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Gas streaming out of air filter!

hey all, I just replaced the seals in float bowls and jet housings on the carbs because their old and I noticed a gas leak coming from the bottom of the carbs. After I mounted them and put the petcok on PRI, after about 5 min, my air filter to the front cylinder (left side) was soaked and gas was pouring out in a small stream. Also, once if fired up I was getting tons of back fir from the rear cylinder even after capping the reed valves. My guess is that it has something to do with the float. Has anyone had an issue like this or can someone confirm my suspicion??? HEEELP!!!

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post #2 of 9 (permalink) Old 08-16-2010, 05:54 PM
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stuck float. mine did it
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post #3 of 9 (permalink) Old 08-16-2010, 06:23 PM Thread Starter
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how did you free it up? Is it just a matter of cleaning the float bowl out or did you do something special?

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post #4 of 9 (permalink) Old 08-16-2010, 07:20 PM
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PRI is to Prime the carbs. Set it to RUN and see what you get.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
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post #5 of 9 (permalink) Old 08-16-2010, 09:05 PM
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honestly I swapped out carbs(and engine) then tore down the carb set and front float was stuck down. i would put a dose of seafoam in the tank and fire it up to pull fuel thru it and try to free it without tearing it down. tear down is a real PIA
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post #6 of 9 (permalink) Old 08-17-2010, 10:58 AM Thread Starter
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I agree it's a pain, I will try to run some seafoam through it. Also, My petcock only says ON, PRI & RES. I know that ON is to stop fuel flow, so where am i to position the lever at for normal running?

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post #7 of 9 (permalink) Old 08-17-2010, 11:22 AM
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If I remember right, On and Res are vacuum operated, which will open when the engine is turned over. PRI is full open, meant to fill the bowls before you crank, and lets the fuel free flow, so if the float was stuck for instance, PRI would soak your bike!

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post #8 of 9 (permalink) Old 08-17-2010, 11:28 AM
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Some times, tapping on the carb with a screwdriver handle will unstick a float. So try that, and Sea Foam too. As Fergy said, ON or RES are used for riding. I like to run mine on reserve periodically to pull fuel out of the bottom of the tank where condensation forms.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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post #9 of 9 (permalink) Old 08-17-2010, 12:08 PM Thread Starter
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thanks for all your replies, I will try this out tonight! you guys rock!

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