Question about 1991 Suzuki GSF 400 Bandit

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Flodding carbs Just bought a 91 400 Bandit LTD . I have a very slight fuel leak when the bike is at a stand-still Either on the centre stand or main stand. Anyone any thoughts or solutions?

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Sounds like a sticking float in the carb....remove the bowls and check for sticking, bad float, or needle and seat partially open...might be just some dirt in there

Posted on Feb 09, 2009

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My Suzuki bandit wont start. There is a spark but it just wont go! There is fuel on some of the plugs when I take them out, and I am wondering if I have flodded the engine and fuel has conjealed in the...


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In the prime position fuel will always flow from the tank. In the other positions the engine must be running to allow fuel to flow. If the bike has been standing for a few days, fuel will evaporate from the carbs and the bike can be difficult to start. By switching to prime for a minute, the carbs are replenished and starting should be easy. Dont forget to return the tap to on or reserve once started.

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You have float and/or needle and seat problems. Remove the hoses from the air box to each carburetor. Set bike on center stand or block up to get it level--turn on fuel tap and watch for leakage from each carburetor. Turn the fuel tap off. Pop the float bowl off of any that leaked, remove the float and pin--catch the float needle. You probably have debris in the seat area which causes faulty float action. Turn on the fuel tap again and catch the discharge in a clean small jar. Look for rust or other particles in the fuel. If all carburetors are affected, look at the fuel strainer screen just above the fuel tap bowl--no holes and seated properly. You may need to flush the tank if the interior is rusted or full of dirty fuel.

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4 Answers

Tick over


You have an air leak after the carburetor. Old, cracked rubber fittings between carb and cylinder will let air into the manifold causing a lean fuel/air mixture. Same is true of "O" rings and gaskets. If there is a leak in the head gasket that will lean the mix also. Fix the air leaks and you fix the problem.

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Jun 17, 2009 | 1992 Suzuki GSF 400 Bandit

1 Answer

Suzuki GSF400 Bandit problems with tick over.


as you have replaced carbs you will need to retune for fuel intake also check its getting enough air ie.. air filter has been changed or is clogged

Jun 16, 2009 | 1992 Suzuki GSF 400 Bandit

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blocked carbs, get a good fuel system cleaner, if you in USA get Berrymans B12, double the dose and mix in tank. run til hot then leave to stand overnight. also if you can remove the air cleaner to get to carb intake, get spray carb cleaner an chuck a load in there. also check to see if you have a fuel filter inline

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BMW R80 1987 Leaky Bing carburettor…


Type in "R80 carb rebuild kits" in google. There's a few sites that have them on offer. Generally just the diaphams, gaskets and O-rings. http://www.ascycles.com/detail.aspx?ID=2688 Float level may be set too high on one side allowing it to overflow too. Had a similar issue on my R65. Just got in the habit of putting it on the centre stand and turning the fuel cocks of when not mobile.

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