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Overflow tubes leaking gas

This is a discussion on Overflow tubes leaking gas within the Yamaha YFZ350 Banshee (1987-Present) forums, part of the Performance /Technical category; My girlfriend's banshee recently started leaking gas out of both carbs. It is a '98 and the carb's have never been rebuilt. I put toomey's ...

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Old 12-06-2004, 11:14 PM   #1
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Default Overflow tubes leaking gas

My girlfriend's banshee recently started leaking gas out of both carbs. It is a '98 and the carb's have never been rebuilt. I put toomey's on it a month ago, awesome pipes by the way, now the carbs both slowly drip fuel from the overflows. I did put in new needle, different mains, etc. so I had the carbs apart, however, everything went back together fine and it runs great.

The overflow screws are tight, and I'm debating between sticking floats and worn needle valves/seats. If I tap on the side of the carbs, the leaking usually stops, but will start again in 1/2 hour or so. I checked the needle valve assy and the conical rubber piece looked fine, but maybe I'm overlooking something else.

Please help and thanks.
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Old 12-06-2004, 11:17 PM   #2
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If tapping stops it my money's on sticking floats.
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Old 12-07-2004, 05:27 PM   #3
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Quote: Originally Posted by Warrior
If tapping stops it my money's on sticking floats.
Yep, my banshee did this and i jsut adjusted my floats and its fine now, every so often i'll se a little bit of gas on the floor but adjusting the floats fixed it.
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Old 12-07-2004, 06:30 PM   #4
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Yep just fixed my friends blaster few weeks ago, it poured out the overflow right when you turned the gas on, messed with the floats and foudn the problem and fixed it

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Old 12-08-2004, 05:59 AM   #5
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or dirt in the pilot
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Old 12-08-2004, 08:11 AM   #6
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My floats did this last week.
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