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Fuel in carb boots

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22 Oct 2005 18:07 #3499 by Willo46
Fuel in carb boots was created by Willo46
Got some new carb boots from Z1 Enterprises Jeff Saunders (super fast shipping!!! ordered Thursday arrived today, what a great guy to do business with!) The old ones were cracked.

Anyway when I pulled the old boots off there was gas puddled in them. I know I didn't leave the petcock on. Where could the gas be coming from? I have VM26's and EMGO pods. I cleaned the carbs and set the float levels a few weeks ago, could I have set them too high, or could it be a symptom of cracked boots?:huh:

Thanks!

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22 Oct 2005 18:13 #3500 by wiredgeorge
Replied by wiredgeorge on topic Fuel in carb boots
W-46 - Gas is atomized in your carburetors and travels THROUGH the boots to get to the combustion chambers. Nothing unusual about the gas puddling in the boots when the bike isn't running... In fact, I would think it would be unusual to find them completely dry...

If there was a BUNCH of gas, you may have the float levels high and some is leaking past the float seats/needles. Make sure you have an inline filter to keep crud from ruining the seal and shut your gas off when parking the bike.

wiredgeorge Motorcycle Carburetors
Mico TX
www.wgcarbs.com
Too many bikes to list!

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22 Oct 2005 18:22 #3503 by Willo46
Replied by Willo46 on topic Fuel in carb boots
Sorry didn't mean to sound like a dummy just seemed like more fuel than I would have expected. There was a puddle in the boot and down in the vacuum plugs. I will recheck the float levels while I have the carbs off and see if the petcock is leaking when it's off!

Have a good one!

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23 Oct 2005 03:52 #3564 by fixer5000
Replied by fixer5000 on topic Fuel in carb boots
every time ive pulled those plugs to check synchronisation theres been fuel in the tubes...i think its normal...steve

1978 kz650b pretty much stock
\\\\\\\" get there fast but arrive alive \\\\\\\"
massachusetts

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23 Oct 2005 06:42 #3582 by John68
Replied by John68 on topic Fuel in carb boots
I just did the same thing about 3 hours ago. I pull the vaccuum plug, and said,(like a dummy) "there's gas in here!" then, I realized, there was gasoline in an intake part, duh... Something else to consider. If anyone has ever worked on an old farm tractor with an updraft carb, you will note that there is a gas weep hole on the intake side of the barrel. When you choke an engine, you are essentially cutting off a large amount of the carburetor barrel, from the airbox, and the engine vaccuum pulls a lot of fuel from the main jet, and sucks it up into the engine. whatever doesn't make it up into the combustion chamber, would then fall back down the throat, into the bore, and have no where to go. Hence the "weep hole." I'd imagine that gasoline in a motorcycle could act in a very similar manner, with the higher cylinder pressure, and vaccuum, compared to a little old farmall tractor.

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