my gs500e is pissing fuel out the air box!

[veze]

i bought a mint gs 500 e the other day. it had been standing for a year. i woke up to a tank of feul pissed all over my garden. so i realised the floats werent seating properly cuz there was more than likely crappy old feul in the carb so i stripped the, took the floats out, gave everything a blow and i clean, and i mean realy analy clean, then put it all bck together and put an inline feul filter between the tap and the carbs in time to leave for british superbikes. it was fine all weekend up until today.
i was on the A46 when i accidently ran out of fuel. i manged to get a pertol can full stick it on prime, then reserve. filled it up and rode to my dads. when i parked up i could smell fuel. it was backing up into the airbox again and pissing out the drain hose. i needed to get it home, so i started it up and rode home. when i got it home it had stopped.
could it be that the floats are not seating properly? and of all the things, why is it going into my airbox and not out the overflow?
much apreciated.
josh.
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tlm50,mt5,sr50. rs125 extrema, cbr 400rr nc29 suzuki gs500e.Honda cbx250 rs . FJ1200 .fz6,fjr1300

[Bezzer]

At least one of your float needles aren't sitting/sealing right as you know, but there's also a tap problem, if one or the other are fine then you wouldn't get flooding with the engine off, both have to have a problem for it to flood.
It's going to be the diaphragm in the tap that's knackered, dried out and cracked a bit probably as it was standing a while.
You're going to have to have another go at the float needles and get a repair kit for the tap.
It goes through the carbs back up the rubbers to the airbox then comes out of the drain, the petrol overflow is for when the tank is full so that's why it isn't coming from there.
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I used to be indecisive but now I'm not quite so sure.

[veze]

so if i take the hose of going from the tap to take carbs and move it to all three positions. i take it theres should be no fuel coming out because of the diaphram? if there does i deffo know it is shafted? i have also noticed that th tap is all mixed up. when i bough it, the chap said left was prime, down was on and up was reserve i think, but it says totally different on the tap.
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tlm50,mt5,sr50. rs125 extrema, cbr 400rr nc29 suzuki gs500e.Honda cbx250 rs . FJ1200 .fz6,fjr1300

[Bezzer]

On and Reserve you shouldn't get petrol without the engine running, on Prime it should flow engine running or not.
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I used to be indecisive but now I'm not quite so sure.