Question about 1981 Suzuki GS 750 L

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There is gas leaking out of the airbox on my 1982 suzuki gs750. i rebuilt the carbs and adjusted the floats but it is still leaking

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Replace float needles and seats

Posted on Aug 07, 2010

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The carbarator in 1982 van isflooding after rebuilt


The most common reasons are dirt in the passages or a faulty float or needle and seat.
The float pushes down on the needle to shut off gas flow from the pump.
Its also possible one of the gaskets has failed and the carb is leaking internally.

Apr 14, 2013 | Cars & Trucks

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Overflowing Carbs again!!!


recheck and clean /adjust floats pet **** doesnt stop fuel in bowl if floats out of adjustment or valve sticking/debris will allow fuel to constant flow

Jun 04, 2017 | Suzuki Motorcycles

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Still workin on my 1980 suzuki GS550 L. Inline 4 cylinder. My Problem is When I run the bike I have gas coming out of my overflow tube for the number 1 and number 2 carburetors but if I disconnect the...


Hi, Davescheier6 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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Apr 23, 2017 | 1980 Suzuki Gs 550 L

1 Answer

Getting gas in the airbox and out of all the vacumm lines on all carbs???


Hi,

The problem would be the gas float stopper in the carburetor. Fuel kept on flowing even when the gas float chamber is already full.
Better open the carb and check the float valve if it stops the flow of fuel when the float chamber is already filled.
Your mechanic or you can adjust the pin stopper by moving /adjusting the float pin seat.
Hope that helps you out.

Thanks for using FixYa!

Jul 07, 2011 | 1999 Suzuki GSX-R 600

1 Answer

2004 suzuki gs 500 leaks gas out of overflow tube and into airbox. runs crappy if at all.


You have a Float that is not closing or a bad needle and seat, my suggestion is to rebuild the carb reset the float and you will be good to go.

Feb 28, 2011 | Suzuki GS 500 F Motorcycles

1 Answer

I rebuilt my carbs and now the number one carb spitts gas out. also when i hit the gas it stalls unless i give it full throttle checked the spark and it is great


CHECK THAT YOU HAVE PROPER FLOAT HEIGHT AND THAT THE NEEDLE VALVE IS NOT STICKING. I HAD A SIMULAR PROBLEM ON MY 1979 GS850 ALL I DID WAS TAKE OFF FLOAT BOWL AND ADJUST FLOAT HEIGHT A LITTLE AND CLEANED NEEDLE OFF SEEMS TO HAVE WORKED NO GAS ON OUTSIDE OF CARBS NOW

Oct 10, 2010 | 1979 Suzuki GS 750 E

1 Answer

1982 Suzuki GS 750 E bogs after 3000 rpm carbs have been rebuilt


Hi, K_huffman engine "BOG" is mainly caused by a rich air and lean fuel condition but it can also be caused by a lean air and rich fuel condition this situation rarely occurs and is only caused by the misinformed weekend warrior that owns a toolbox.
The more you open your throttle the more vacuum you are creating in your carburetor venturi and your intake manifold. When you are operating at higher RPM any unmetered air that leaks into your system can become more obvious.
Unmetered air is air that is getting into your system after the fuel has been delivered. If you have unmetered air getting into your system between the butterfly/slide of the carburetor and the cylinder head this will create a lean condition.
All of the rubber components of the fuel system like vacuum hoses and intake manifold that you mount the carburetor to are made of rubber. If none of these components have been changed they are more than likely highly degraded and probably cracked in places to allow unwanted-unmetered-contaminated air into the combustion chamber. Check all of your vacuum lines and vacuum plugs for carburetor synchronization. The vacuum plugs are in the head just after the rubber intake manifolds. The petcock has a vacuum line as well as part of the emission system.
1. Check the intake manifold for fissures.
2. Ensure the bands used to tighten the manifolds down on the intake are secure and have not bound up the manifold.
3. Make sure air box fittings are not warped and fit completely over the carburetor.
Your airbox is metering air and is the first step in a process of consuming air and fuel. The system requires the resistance of the air filter in order to get the proper vacuum to "SUCK" the fuel out of the float bowl and create the proper venturi effect.
Improper mounting and sealing of the airbox will create a small lean effect. This might seem like no big deal but you are inviting dust and debris in your engine that is doing slow damage by not having proper fitment. Fix it so you know it's not contributing to your issue. Pick the low-hanging fruit first.
Do not go and start adjusting anything at this point. It ran fine before. There is something wrong with the assembly or a component. Do not adjust your floats. Get it back to where it was. The moment you start tweaking everything is the moment you lose OEM settings which are a must-have for fine-tuning and maximum performance.
Fine-tuning your carburetor and multi carb syncing come at the very end following the proper procedure established by the Carburetor Gods.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Thread My GS850 Bogs down when accelerated quickly
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http://www.vanluik.eu/Suzuki%20GS750%20Service%20Manual.pdf
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http://mybikemanuals.com/suzuki/suzuki-gs-owners-manuals

Sep 22, 2010 | 1978 Suzuki GS 750 E

2 Answers

One floods one cylinder the other dont give gas at all on a 1978suzuki gs400?how can i solve this issue myself?


sounds like you may have to rebuild your carbs. This could mean just removing the carbs, removing the float bowls and cleaning out the jets and float valves. It may however require the purchase of a rebuild kit if the float valves leak. be sure to jot down the number of turns to any adjusting screws for mixture and such so that you may return to stock adjustment when you are done rebuilding the carbs. don't forget to check for proper ignition of spark plugs. make sure choke is not sticking in the closed position.

Sep 13, 2010 | Suzuki GS 400 E Motorcycles

1 Answer

Fuel runs out the the right vent tube and breather hole when the engine is running. Disconnect the vac line from fuel tank and no leak. Is the vac fuel pump overpresuring the system? 1982 Suzuki GS750


The vacumn line only controls the flow from the fuel tap. When there is vacumn(motor running) the fuel will flow. It is not a pump and cannot pressurize the system. So when you remove the hose it effectively turns the fuel tap off.
If a carb is flooding , it is because the float valve is not sealing, either dirty, or it is damaged or worn. It is sometimes possible to stop it with a tap from the handle of a screwdriver etc on the carb bowl. but more than likely the carbs will need cleaning and servicing. and I have no idea why this answer is typing in italics

May 15, 2010 | Motorcycles

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