where to find the right air cut off valves. or block them?

If it's broken or just needs tweaked

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zohmbo
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Joined: Mon Sep 07, 2015 11:15 pm

where to find the right air cut off valves. or block them?

Postby zohmbo » Mon Sep 14, 2015 5:12 pm

Anybody know a good place to buy the air cut off valves? The rubber on mine are torn. Or if it is a good idea to close the holes?

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JorgenL
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Location: Helsingborg, Sweden

Re: where to find the right air cut off valves. or block the

Postby JorgenL » Tue Sep 15, 2015 7:07 am

Ebay.com has a bunch of them but there's quite a price tag on them.

Siriusconinc.com usually have what I'm looking for http://www.siriusconinc.com/pro-detail.php?pid=&product_id=121061

I bought new ones for a carb rack that I did for a friend. Was thinking about blocking them but never got to it.

zohmbo
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Re: where to find the right air cut off valves. or block the

Postby zohmbo » Tue Sep 15, 2015 7:13 am

There like 25 on that website also. Would only need 3 since the 2nd carb has the accelerator pump and that seems ok yet.

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Folsoml
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Re: where to find the right air cut off valves. or block the

Postby Folsoml » Tue Sep 15, 2015 8:14 am

I would bypass them. That's the easiest thing to do.
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zohmbo
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Re: where to find the right air cut off valves. or block the

Postby zohmbo » Tue Sep 15, 2015 5:34 pm

I couldn't find a good post to learn how. Can you explain what to do or forward a good post about it? If I do that is it going to idle fine? Or maybe backfire while decelerating? Everything is stock except the ignition upgrade

zohmbo
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Joined: Mon Sep 07, 2015 11:15 pm

Re: where to find the right air cut off valves. or block the

Postby zohmbo » Tue Sep 15, 2015 5:37 pm

Nvm on that I found it in your link. I'll just have to read through it later!

zohmbo
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Re: where to find the right air cut off valves. or block the

Postby zohmbo » Tue Sep 15, 2015 10:13 pm

Just read through both of those threads. I will be going at it Thursday night when I'm off work. I'll try the tooth pick for a test. If that works I'll have to have a friend solder it up. Will post back and let you know

zohmbo
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Re: where to find the right air cut off valves. or block the

Postby zohmbo » Tue Sep 15, 2015 10:18 pm

Wait! Do I do this on all 4 carbs? Since the number 2 carb Hass the acc. Pump on it?

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JorgenL
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Re: where to find the right air cut off valves. or block the

Postby JorgenL » Wed Sep 16, 2015 3:49 am

I don't think the acc-pump has anything to do with the cutoff.

The acc pump squirts fuel through the thin brass pole in all the carbs using the small aluminum tubes between the carbs, not just number 2. The pump itself just happens to be located on carb 2.

The acc pump squirts fuel when accelerating while the cutoff adds fuel when you decelerate from high speed to prevent a lean condition.

So all four cutoffs should be blocked...

zohmbo
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Re: where to find the right air cut off valves. or block the

Postby zohmbo » Wed Sep 16, 2015 4:44 am

I was just asking because I didn't see an air cutoff valve on number 2

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JorgenL
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Re: where to find the right air cut off valves. or block the

Postby JorgenL » Fri Sep 18, 2015 1:28 am

That's strange, the 79 carb I was cleaning had a brass hole at eight o clock in all the carbs.

Just like in this pic http://smg.photobucket.com/user/joeducati/media/parts/2009-08-19102252.jpg.html

zohmbo
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Re: where to find the right air cut off valves. or block the

Postby zohmbo » Fri Sep 18, 2015 2:36 pm

I stuck some tooth picks in as a test. Good results. Don't need the coke all the time. It's running kind of rich so for that I'm going to put in the 75$ worth of air cut off valves. But I tried the tooth picks and synced them last night. (Easiest bike I ever had for syncing)

zohmbo
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Re: where to find the right air cut off valves. or block the

Postby zohmbo » Fri Sep 18, 2015 2:36 pm

Image

zohmbo
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Re: where to find the right air cut off valves. or block the

Postby zohmbo » Fri Sep 18, 2015 2:38 pm

I'm going to make a 4 bottle manometer. But that set up was from my 87 vs700


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