Question about 2006 KTM 200 EXC

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Turn the fuel on and gas runs out of the overflow tubes it does not need to be running to be to overe flow changed the float

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The carburetor float needle and seat need to be either replaced, cleaned, or adjusted.

Posted on Apr 04, 2014

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1 Answer

After engine is started fuel flows out of carb vent tube


Hi, Lou and the usual suspects are:
1. Damaged or restricted fuel tank venting system.
2. Loose float bowl screws.
3. Damaged float bowl o-ring.
4. improper fuel level in the float bowl.
5. Worn or dirty inlet valve or seat.
6. Damaged or leaking float assembly.
7. Particle contamination in inlet fitting cavity.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
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1 Answer

Why is bike flooding and pushing gas out top over flow hose on carb after it runs for a min or two. Carb float been replaced still doing it.


Hi, Paige and the usual suspects are:
1. Damaged or restricted fuel tank venting system.
2. Loose float bowl screws.
3. Damaged float bowl o-ring.
4. improper fuel level in the float bowl.
5. Worn or dirty inlet valve or seat.
6. Damaged or leaking float assembly.
7. Particle contamination in inlet fitting cavity.
For more information about your issue please visit the websites below. Good luck and have nice a day.
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Mar 28, 2016 | GAS Motorcycles

1 Answer

Why am I still getting fuel coming out of the over flow pipes ?


Hi, Nigel reset your float height to 21mm obviously thats not the problem and the other usual suspects are:
1. Damaged or restricted fuel tank venting system.
2. Loose float bowl screws.
3. Damaged float bowl o-ring.
4. improper fuel level in the float bowl.
5. Worn or dirty inlet valve or seat.
6. Damaged or leaking float assembly.
7. Particle contamination in inlet fitting cavity.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have nice a day. xlch@mail.com
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Mar 23, 2016 | Motorcycles

1 Answer

Yamaha v-star float bowl adjustment


No. Wrongly adjusted float height makes the engine fail to run.
If you get over flow leak (from the overflow hose) your fuel needle inside the carburetor simply does not close the gas supply hole firmly even if the floaters still pressing it against that hole.
That is because the over flow holes on a carburetor are so far above the floaters that even with the float height wrongly adjusted, the fuel needle should stop the gas from overflowing and simply made your fuel mixture too rich.

Oct 11, 2012 | 2003 Yamaha V Star 1100 Classic

1 Answer

2002 ttr 125 fuel leaking out overflow tube


Hi, Anonymous and the usual suspects are:
1. Damaged or restricted fuel tank venting system.
2. Loose float bowl screws.
3. Damaged float bowl o-ring.
4. improper fuel level in the float bowl.
5. Worn or dirty inlet valve or seat.
6. Damaged or leaking float assembly.
7. Particle contamination in inlet fitting cavity.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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Jul 21, 2012 | 2002 Yamaha TT-R 125

1 Answer

I have 1981 Honda CX500C motorcycle. You know the overflow hose that runs out the bottom of the carb back behind the engine by the center stand. Well the other day I noticed gas pouring out of that hose...


The carburetor over flow tubes should be open. Here are the possibilities. 1)Your carburetors are dirty and need to be cleaned. Clean your carburetors. 2)Your carburetor float needles are damaged and causing the carburetors to over flow. Replace your float needles. 3) The fuel filter is missing on the fuel petcock and rust is causing the carburetors to overflow gas. Put the fuel filter back over the carburetor inlet tube and/or add an inline filter to stop the rust from sticking the needles open and over flowing the carburetors. 4) Your floats have become saturated with fuel and no longer float in gasoline. Replace your floats. Poor idling or idling on only one cylinder can be caused by a bad spark plug cap. If you unscrew the spark plug caps and OHM them out they should read 5000 OHMS no higher and no lower. Good luck you have your homework.

Jul 17, 2011 | 1981 Honda CX 500 A

1 Answer

Fuel over flows thru overflow tubes only when motor is running. motor off ignition on it stops.


Hello
Your gas tank petcock is diaphram operated.
there is a vacuum line coming off the intake, that goes straightb to the petcock.
when you turn the motor over a vacuum is created, pulling the petcock diaphram back and allowing fuel to flow to your carburetor. when you turn the motor off the vaumm is gone and the spring behind the diaphram pushes it closed and stops the fuel flow to the carbs.

Now the reason the carbs are overflowing is because the floats valves are not closing, in other words the floats are sticking.
Usually a good carb clean will cure the problem, especially for that year.
the older ones usually require new float valves/seats that are usually found in a good carb rebuild kit. You shouldn't need one.

If your really broke try tapping on the bowls of the carburetor lightly, while the engine is running, sometimes the vibration will vibrate a particle loose that may be holding open the float valve.
if it works then the fuel should stop overflowing while running.

if you know how to work on it, try this, with the engine off.
open the carburetor drain screws so that fuel will run out the carb. drain. flush out the carb.
get a container to catch the gasoline.
while fuel is flowing tap the carb bowls a few times then closed the drain screws.
clean up any spilled gasoline .
start your bike.see if they stop leaking and the floats are closing.
if it still leaks, you'll need the cleaning.

Happy Riding
Best Regards
Big Al

May 22, 2011 | 1997 Yamaha Royal Star XVZ 1300 A

1 Answer

Over flow tube is leaking gas on a new cmx250 rebel. Is the float stuck? How do I fix it?


If its the overflow, cleaning the sticky carb float could be simple fix.
Turn off fuel, drain the carb, with drain open spray carb cleaner into the bowl through the drain.(enough to rinse away varnish) then try it out, if all is good you are done. If it still runs gas out you will need to open the carb up to clean out the trash.

Apr 18, 2010 | 2002 Honda CMX 250 Rebel

1 Answer

Gas leaking from hose that is under tank that is not for gas flow


is it an overflow from the carb? gas will only be in one of 2 tubes and they are the fuel line from the tank and the carb over flow. unless you have an electronic fuel pump then tubes go from tank to pump to carb. if its coming from the overflow then you are getting too much fuel into the carb float chamber. you may have a sticky float. thy getting some Berrymans B12 fuel additive and putting double the doseage in the tank. run engine til hot then leave it to stand overnight. this should break down any gum/varnish that has built up in the system

has this been in storage thru winter?

Apr 02, 2009 | 2001 Honda XR 250 R

1 Answer

Float hieght for 1984 IT 490


not sure of the exact height, but if you hold the carb level with fuel hose attached and pushing float up with finger, turn on petcok and slowly lower the float until it is just above horizontal. at this point, gas should start to flow out of the needle & seat.

if float turns off gas too soon, then engine will starve.

if float doesn't turn off gas, then it will flow out of the carb overflow tube.

Mar 14, 2009 | 1974 Yamaha DT 360

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