Vacuum gauges for Carb sync


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GW-Newbie2013
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Vacuum gauges for Carb sync

Postby GW-Newbie2013 » Fri Jul 19, 2013 9:31 pm



Well, looky what my Wife gets me for the motorcycle. Will these work for the carb syncing? she got me two of them. I know that the DIY page shows 4, but....well...these suckers are kind of expensive.

will this work?
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virgilmobile
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Re: Vacuum gauges for Carb sync

Postby virgilmobile » Fri Jul 19, 2013 9:56 pm

I've used them.Even syncing using just 2.
If you do,first hook both gauges at the same time to one vacuum port.Operate the engine and verify both gauges read the same.I bought 4 of them and had 4 different readings.Kind of a pain to keep the numbers straight.
They ended up in a drawer and I built a "oil" type gauge.

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Re: Vacuum gauges for Carb sync

Postby GW-Newbie2013 » Fri Jul 19, 2013 10:13 pm

Just to REALLY simplify this...(hopefully not erroneously), but syncing these carbs is essentially reading a gauge, getting them to match (with any necessary mathematical adjustments of course and ill be on my way eh?
Life is a bowl of cherries. Just remember to slingshot the pits at the chuckleheads once your done eating.

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Re: Vacuum gauges for Carb sync

Postby virgilmobile » Sat Jul 20, 2013 7:52 am

Yup,once you understand that to have a well balanced engine,each cylinder must have the same vacuum at 1000 rpm.

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Re: Vacuum gauges for Carb sync

Postby GW-Newbie2013 » Sat Jul 20, 2013 4:39 pm

you....virgilmobile....are a pip.

Thank you thank you :)
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Re: Vacuum gauges for Carb sync

Postby 80-GL100-INT » Sat Jul 20, 2013 8:24 pm

virgilmobile wrote:I built a "oil" type gauge.


More info on doing this would be outstanding...pics too :D
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Re: Vacuum gauges for Carb sync

Postby GW-Newbie2013 » Sat Jul 20, 2013 9:14 pm

The oil gauge or the syncing hoss?
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Re: Vacuum gauges for Carb sync

Postby 80-GL100-INT » Sat Jul 20, 2013 9:54 pm

The oil gauges :lol:
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Re: Vacuum gauges for Carb sync

Postby GW-Newbie2013 » Sat Jul 27, 2013 3:16 pm

What I have for the vacuum adapters are the following. Would this work? I mean, I assume that it would, but how far should I slide the hose on the adapter? I would think just until I made sure I wasn't getting a vacuum leak as I do the sync. right?
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Re: Vacuum gauges for Carb sync

Postby dwight007fchr » Tue Jul 30, 2013 7:11 pm

I am also interested in any info. as to where we can find a decent price on a set of 4 of these guages. Checking on Ebay, I think they were running between $150-200......more than I want to shell out just to sync the carbs.

GW Newbie......I think it would be a good idea to install the vacuum lines on these brass extensions before you thread them into the carb bases, as you dont want to exert any undue forces on those brass/aluminum threads. If the hoses go on way too easy, you may want to use some small hose clamps to ensure there are no leaks.

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Re: Vacuum gauges for Carb sync

Postby 80-GL100-INT » Wed Jul 31, 2013 1:43 pm

dwight007fchr wrote:I am also interested in any info. as to where we can find a decent price on a set of 4 of these guages. Checking on Ebay, I think they were running between $150-200...


http://www.ebay.com/itm/190877914910?ss ... 1423.l2661
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Re: Vacuum gauges for Carb sync

Postby virgilmobile » Wed Jul 31, 2013 3:47 pm

I didn't want to wait and I am cheap so here's what I did.....viewtopic.php?t=8994&p=40711

There's a lot of ideas that work to sync the carbs on the net...It's just remembering how to do it...
right bank first,then the left bank and finally sync the left pair to the right pair.All while keeping the engine at 1000 rpm.

Some guys will use long lengths of tubing with some oil in it,propped up on a 4' 2X4...It works but a bad sync to start with can suck the oil into the engine...That's why I opted for the bottle method.The oil is simply transfered back and forth between the connected bottles.When they stay at a equal level the carbs are pulling exactly the same vacuum.
As with any sync tool,a control valve is needed by the engine to adjust the pulsing affect of that one cylinder...It's not like a car with a continuous vacuum,it pulses with every stroke.
Here's more types that work from Google images....

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Re: Vacuum gauges for Carb sync

Postby dwight007fchr » Wed Jul 31, 2013 8:17 pm

VirgilMobile.......Man, youre a genious! Thats an excellent little contraption you got going on! You sure you arent making moonhine with that thing? Seriously, thanks for this information.....I may give this a try myself. Sometimes it brings great satisfaction to hand-make a contraption like this instead of just shelling out bucks for a 4-set of vacuum gauges. The used motor oil bubbling in the beakers is a big plus.....whats not to like.

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Re: Vacuum gauges for Carb sync

Postby virgilmobile » Wed Jul 31, 2013 9:19 pm

Moonshine? He he.
The neibours think I make it outside.I made my own outdoor wood boiler to heat my house in the winter.

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Re: Vacuum gauges for Carb sync

Postby Wingsconsin » Wed Jul 31, 2013 10:04 pm

http://www.amazon.com/vacuum-carburetor ... carb+synch

$64.50 + $10.50 shipping...

These are the kind I have and they work perfectly
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Re: Vacuum gauges for Carb sync

Postby dwight007fchr » Thu Aug 01, 2013 6:45 am

virgilmobile wrote:Moonshine? He he.
The neibours think I make it outside.I made my own outdoor wood boiler to heat my house in the winter.



Now we know........what name did you pick for your labeling process?

Maybe "Grannies MoonGlow", "Wing Shine" (with a note "also used as superb carb cleaner and octang booster").

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Re: Vacuum gauges for Carb sync

Postby dwight007fchr » Thu Aug 01, 2013 6:51 am

Wingsconsin wrote:http://www.amazon.com/vacuum-carburetor-synchronizer-carb-gauge/dp/B004MSJ7E6/ref=sr_1_1?ie=UTF8&qid=1375326211&sr=8-1&keywords=4+guage+carb+synch

$64.50 + $10.50 shipping...

These are the kind I have and they work perfectly



Good info......I see the kit comes with 5mm brass extensions.....is this the right size for the GL1100?

Thanks.

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Re: Vacuum gauges for Carb sync

Postby virgilmobile » Thu Aug 01, 2013 7:07 am

I had to get a bit more "local" ( Louisiana )....it's called
Gator pee. :lol:

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Re: Vacuum gauges for Carb sync

Postby Wingsconsin » Thu Aug 01, 2013 8:50 am

;)
dwight007fchr wrote:
Wingsconsin wrote:http://www.amazon.com/vacuum-carburetor-synchronizer-carb-gauge/dp/B004MSJ7E6/ref=sr_1_1?ie=UTF8&qid=1375326211&sr=8-1&keywords=4+guage+carb+synch

$64.50 + $10.50 shipping...

These are the kind I have and they work perfectly



Good info......I see the kit comes with 5mm brass extensions.....is this the right size for the GL1100?

Thanks.


The ones I have fit fine..the hose is TIGHT on them but it will work once you push that hose on the end of each 'pipe' .
Be sure to snug them down to the oring to prevent vacuum leaks while testing.
Just yesterday we managed to get our (my sons) GL1100 into PERFECT CARB SYNCH (after many trials)..
WHAT a difference it makes to get thos 4 carbs pulling together...
Postings are my opinions based on experience and acquired knowledge.
Your results may vary. Universal disclaimers apply.


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http://neverlost-justexploring.blogspot.com/

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Re: Vacuum gauges for Carb sync

Postby dwight007fchr » Thu Aug 01, 2013 1:02 pm

The ones I have fit fine..the hose is TIGHT on them but it will work once you push that hose on the end of each 'pipe' .
Be sure to snug them down to the oring to prevent vacuum leaks while testing.
Just yesterday we managed to get our (my sons) GL1100 into PERFECT CARB SYNCH (after many trials)..
WHAT a difference it makes to get thos 4 carbs pulling together...
[/quote]

Thanks.....makes me want to get my synced asap......either with the bubbling used motor oil trick or with this set of gauges.

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Re: Vacuum gauges for Carb sync

Postby Wingsconsin » Thu Aug 01, 2013 2:25 pm

Results of the "Perfect Carb Synch" ---Todays 1st tank of fuel burned went from a previous 36-37 MPG to 39.6 MPG ... 10% improvement...
He is out running the freeway for 100 miles right now to determine that speed MPG as well....Last tank under those conditions (65-70MPH) was at 34 MPG ....I expect a little better.....
Postings are my opinions based on experience and acquired knowledge.
Your results may vary. Universal disclaimers apply.


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Re: Vacuum gauges for Carb sync

Postby washandy98664 » Sat Sep 07, 2013 12:27 am

I just bought 1 gauge .
Got my baseline from carb 3 and just matched the rest from that.
Was pretty easy.

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Re: Vacuum gauges for Carb sync

Postby JDMAG » Sat Sep 07, 2013 7:52 am

I bought 1 gauge. Added a T and 2 lawn mower petcocks. I got the baseline from #3, and adjusted #1. Then I adjusted #2 to #4, and #4 to #3. The valves dampen the oscillations if you shut them down to where the needle barely moves. A little over $25.00 total I think.

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Re: Vacuum gauges for Carb sync

Postby mikie 1954 » Sat Sep 07, 2013 4:32 pm

I did mine with two. Wasn't that hard , just get a reading on both Gage's from #3 and note any difference between the two. Then do 1 to 3 ,then 2 to 4 , then 4 to 3 . I had to go around it a couple of times but was not hard to do with 2 Gage's .

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Re: Vacuum gauges for Carb sync

Postby JDMAG » Sat Sep 07, 2013 11:53 pm

With one, gage and a T you don't have to worry about the difference between gages. just come off of the gage with about 1 foot of suitable hose, add the Tee, on either side of the Tee add about 3 foot (or enough to reach from # 4 to #3 carb) on each side add the petcock. after the petcock add about another 4 or 5 inches of hose to help dampen the movement of the needle. then hook up on 3 & 1 and close off #@ to get your base off of #3. open three just enough to allow vacuum, but not all the oscillation of the needle. get your reading, and close the valve and move on to #1. bounce back and forth a couple of times. Then move to #4 and #2. do the same and move to #4 and #3. Then do it again maybe. ......Maybe a couple of times more.... :D




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