1996 kawasaki VN 1500 Vulcan Classic Logo
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jay mac Posted on Apr 15, 2014
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Fuel leaking out of carburettor thru air intake valve

I turn on fuel, try starting bike but floods, fuel runs fast thru carb and out of air filter . took apart carb , needle seating ok and float seems to be functioning ok too. also if fuel is turned on without trying to start , same happens ..

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andrewhall

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  • Posted on Apr 15, 2014
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If this happens immediately after the fuel is turned on and your float and needle are known good (Check float by dropping float in fuel, check needle by holding closed and putting air or carb cleaner in fuel inlet.) then, your float height is incorrect. If there is a drain at the bottom of your carb add a clear hose and put fuel to fuel inlet on carb. Open the drain and check your fuel height (bring the hose above the carb making a J shape). On my keihin carb it is about at the bowl split line.

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  • Posted on Apr 15, 2014
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Try screwing the bolt of the fuuel holderr in the carborator, whhichh is generally used for overflow, screw it tight ,

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5 Related Answers

Anonymous

  • 53 Answers
  • Posted on Mar 24, 2009

SOURCE: Just went to start after winter blowing gas out the air cleaner.

sounds like the needle and seat is not sealing.It is a common problem when bics are stored over winter.Either remove carb and clean nedle and seat or replace to be sure.

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Anonymous

  • 490 Answers
  • Posted on Apr 15, 2009

SOURCE: 1998/99 kx 125 fuel leaking from carb outlet at bottom

sounds like the needle and seat may be the problem

DoubleClutch

Greg O'Day

  • 376 Answers
  • Posted on Sep 29, 2009

SOURCE: Air box and crank case fuel flooding problem

Well there only one way the fuel can get into the crankcase and that's from the fuel tank. The petcock must be draining and the float needles are not stopping the fuel flow. Do you have a prime position on the petcock? If so do not run the bike in the position. Try topping the tank off with gas and letting it sit for a while and see is the gas has gone down and then check the crankcase and see if there's fuel in it again. i still say its got to be your petcock.

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Anonymous

  • 653 Answers
  • Posted on Mar 24, 2010

SOURCE: I had a fuel leak from carb. Took off Throttle

For Float setting try about 26 mm using std main and idle jets

Anonymous

  • 345 Answers
  • Posted on Apr 27, 2010

SOURCE: Replaced diaphram fuel valve and carbs ..cannot

I would say the problem is in your carbys, with the float levels, or a sticky needle and seat. If you open the fuel valve, fuel will flow into the carbys, ans shut off once the correct level is reached. I think the problem is in your carbys, not the fuel valve. I would remove the carbys, take the bowel off the bottom, and check the needle and seat, and float levels. It is not recomended to change the float levels from standard.

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