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 81 CV carb vent TEEs 
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Joined: Mon Oct 22, 2007 4:24 pm
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Location: Blue Ridge Mountains of Virginia
Post 81 CV carb vent TEEs
Got a remanufactured set of carbs. My question concerns the vent TEEs between 1&2 and 3&4. is there supposed to be any hoses attached to the T other than the connecting hoses, or doe's the end of the hose simply point in the air without a hose attached?

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Thu Jun 19, 2008 6:21 pm
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Location: Denver CO USA
Post Re: 81 CV carb vent TEEs
They each have a hose that goes into another T then to the airbox.

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Thu Jun 19, 2008 8:36 pm
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Joined: Wed Apr 04, 2007 2:39 pm
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Location: South-West corner of Poland
Post Re: 81 CV carb vent TEEs
I had problem once with those T's. They were cracked/blocked and carbs were overflowing.After some fiddling I put 4 separate vinyl pipes there that went behind and under the carbs, and problem was gone.... :D


Fri Jun 20, 2008 1:20 pm
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Location: Blue Ridge Mountains of Virginia
Post Re: 81 CV carb vent TEEs
Well, don't have any more Ts, so I'll just run 2 hoses from them out of the way. :wink:

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Fri Jun 20, 2008 9:53 pm
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Post Re: 81 CV carb vent TEEs
You might get better fuel mileage with the vent going into the air box instead of the atmosphere. I don't know if you're concerned about that, but it was just a thought.

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Wed Jul 23, 2008 9:27 am
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Joined: Mon Jul 14, 2008 2:32 pm
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Location: Grand Rapids, MI
Post Re: 81 CV carb vent TEEs
In the diagram of the carbs i posted in the 3way fuel t post, could you tell me the part number of the vent t's?

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Wed Jul 23, 2008 9:42 am
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Post Re: 81 CV carb vent TEEs
Um, looks like the same part to me. Let's see what old gringo says.

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Wed Jul 23, 2008 4:39 pm
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Joined: Mon Oct 22, 2007 4:24 pm
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Location: Blue Ridge Mountains of Virginia
Post Re: 81 CV carb vent TEEs
The only reason I have the T's installed is that they came with the re-manufactured carbs. Otherwise, I don't think they are really necessary except for the straight tube between 2&3. My old set didn't have 'em.
Not sure about the difference in gas mileage but as they just keep the carb
pistons from creating a suction that would flood the airbox I wouldn't worry about them unless you find a good price. Bike Bandit parts are:
218615-001 @ 39.35
218879-001 @ 39.35 :shock:
BTW my fuel mileage is currently 60 mpg if I baby it and 55 mpg if I ride normally :lol: :lol:

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Wed Jul 23, 2008 8:13 pm
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Location: South-West corner of Poland
Post Re: 81 CV carb vent TEEs
Chris wrote:
You might get better fuel mileage with the vent going into the air box instead of the atmosphere. I don't know if you're concerned about that, but it was just a thought.

Hmm, I'm looking always to improve mileage. What's the reasoning behnid it?

Thanks!


Thu Jul 24, 2008 3:19 am
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Location: southern Germany
Post Re: 81 CV carb vent TEEs
I would think what can come out of carbs at all is only fuel and/or air. So there can't be much wrong guiding this to the airbox. If the fuel fraction is relevant, then it might help for the mileage (and the environment).
But watch your plugs, the CV carbs may react on changed pressure conditions. Possibly the effect on mileage could be just that this turns the whole thing a bit further to the lean side.

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Thu Jul 24, 2008 3:31 am
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Post Re: 81 CV carb vent TEEs
In that case, I will let it be. I'm waiting for UNI foam filter, that may lean the mixture some....


Thu Jul 24, 2008 6:58 am
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Post Re: 81 CV carb vent TEEs
Volker_P wrote:
I would think what can come out of carbs at all is only fuel and/or air. So there can't be much wrong guiding this to the airbox. If the fuel fraction is relevant, then it might help for the mileage...


That's what I was thinking.

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Thu Jul 24, 2008 8:17 am
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Post Re: 81 CV carb vent TEEs
I would try it, but carefully observe the plugs and the mileage. Free end hoses are always suspicious and susceptible to dust or rain. But possibly they are really required in just that way as a reference to the outside pressure, therefore the attention to the plugs.

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Fri Jul 25, 2008 1:32 am
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