Spraying Fuel breather hose connector

[Troolhunter]

I'm having some issues with my bike. It was all good when I bought it, I drove it home no problem. It is my first bike, and According to the previous owner, There were no major issues with it. Everything that I saw backed that statement up.

At first, the problem was small. The bike would gain and lose power with the throttle in a constant position. And then it would not start after a stall, that happened while riding and in gear at about 2500 rpms, for about 10 minutes. I drove it the 1/4 mile home (I had just left home when that happened).

And then it started not running for more than two minutes and then leaking fuel out of the air box. about every third start, it would run at about 3500rpm with no throttle. So, I pulled the air filter out, and it was soaked in a dark fuel mixture, and there was about an inch of fuel at the bottom of the air box. I thought it was the floats, but everything was fine with them. So I saw this thread. http://gstwins.com/gsboard/index.php?topic=33835.20  and thought it was the breather tube being clogged, so I pulled that to check it. it was clear, the ports were clear. I started it at this time, with the hose disconnected, and the engine ran fine for about 30 seconds at idle, then stalled. I started the bike again, and it ran at 3500 rpm and then The fuel was spraying out of the breather port (is that what it is called?). It sprayed too, no dribble. So, as soon as it sprays, the engine stalls, every time. I'm at a loss on where to go with this.

Any help would be appreciated

[Watcher]

Check out the floats again.  Fuel is overflowing out of the carbs and spilling into the air box so it isn't being shut off.

Even if the floats are floating, the needles/seats could be bad or the floats could be out of adjustment.

[Troolhunter]

The fuel isn't coming directly from the carbs, it is coming from the breather hose and spraying into the airbox, then the engine shuts off, and won't start again for about 10-15 minutes. I'll pull the carbs out again, and recheck the floats.

What I initially did to check them is to place them in gas for 10 minutes and made sure they floated. They also have no fluid inside of them. I reinstalled them, and blew into the gas line with the float bowls off, manually adjusting the floats to make sure that the float needles set and sealed the fuel inlet. I adjusted both float tangs up so that the fuel turned off sooner. This didn't improve anything. the fuel still sprays out of the breather hose.

Is there anything else that could be causing this, like maybe a bad jet needle? I know too much fuel is getting into the engine, but what is happening in the engine to force the fuel back into the airbox in such a high velocity spray?

Thanks for any help!!  

[Janx101]

Bad/incorrect hose routing? ...  where does this breather pipe come from?

[bmf]

Pics always help.

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[Cosimo_Zaretti]

Assuming your hoses are routed correctly, there shouldn't be any fuel coming out the breather, since it's just for oil vapours, unless your oil is contaminated with fuel.  Pull out the dipstick and see whether the oil stinks of gasoline.

[bmf]

I think I got it, the breather from the carb has been connected to the air box , the vacuum in the air box is sucking gas out of the carb. Who knows where the engine breather is connected to.........

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