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+--- Thread: Fuel tank breather hose leak (/showthread.php?tid=58204)
Fuel tank breather hose leak - binarystarr - 11-04-12
Hi all
Just noticed fuel is dripping from the fuel tank breather hose.
Any ideas as to what could be causing that?
Re: Fuel tank breather hose leak - Falcon 269 - 11-04-12
You sure it's the tank breather hose and not the carb overflows?
If the latter, suspect sticking float (fairly significant outflow, though), a leaky float needle (not common) or a leaky float needle seat O-ring (a lot more common).
http://www.yamahafz1oa.com/forum/showthread.php?t=103599&highlight=found+carb+failure+mode
Re: Fuel tank breather hose leak - Phil TK - 11-04-12
(11-04-12, 01:46 PM)Falcon 269 link Wrote: If the latter, suspect sticking float (fairly significant outflow, though),
My FJ suffered from that until I got the carbs out and cleaned the bowls and float pivot -and replaced o rings and needle jets. However a temporary cure that often worked was to whack the errant carb bowl a few times with the end of a wooden hammer handle.
Re: Fuel tank breather hose leak - locksmith - 11-04-12
I concur, a couple of sharp taps on the carb bowl can be effective.
Re: Fuel tank breather hose leak - binarystarr - 12-04-12
Many thanks guys, haynes manual arrived today so will be out this weekend with the tool kit.
I suspect i may have possibly overfilled the tank but this is a good excuse to get my hands dirty and check a few things over.
Re: Fuel tank breather hose leak - taksi - 12-04-12
My injected '08 FZ1 does it as well in the sun. No carbs to bash so any other ideas?
Taksi
Re: Fuel tank breather hose leak - Falcon 269 - 12-04-12
Just a wild guess ... too much fuel, expanding when it gets warm?
Re: Fuel tank breather hose leak - binarystarr - 13-04-12
Falcon, i think thats more than likely the problem. Only thing is it didn't leak until several days after filling. I guess it may take a while for it to condense and make its way down the tube.
I'm not too worried. Will keep an eye on it and get greasy in the meantime.
Re: Fuel tank breather hose leak - Falcon 269 - 13-04-12
Leaking due to overfilling/expansion would normally be immediate to my mind.
Has it been raining on the bike recently? I wonder if you've had water get around the tank cap and find it's way out via the overflow hose.