$25 vacuum sync GL1100


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virgilmobile
Posts: 7647
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

$25 vacuum sync GL1100

Postby virgilmobile » Mon Oct 31, 2011 8:42 am



I stole some of the design from a U_Tube video ;) .They used the same design for a 2 cyl BMW.
I added 3 valves so I could balance left to right :geek: .The parts came from Wal Mart and Home Depot.Total cost was about $25.
This would idle smooth down to 500 rpm :o .I did set it at 900.I don't like the audio,my I-Phone makes it sound like it's knocking :? but it is very quiet.
This design has the vacuum tubes just in the top cap,not in the oil,that way the engine can't suck in any oil.
It's slow moving and you can watch the oil migrate between canisters.
This was really easy and took about 20 minutes to balance out.
I idled down the road at 1000 rpm and twisted the throttle wide open.It pulled smooth through 7 grand before I ran out of road.I didn't even get to shift :mrgreen:

Here's the pix and video's




Initial hookup




Adjusting the right side carb




Adjusting the left side




Turned the valves to change the gauges to the left to right balance




Final balance with all valves open.Nice and even level and bubbling

I know the left and right in the video are reversed.It's late.
Attachments
Bench setup
Bench setup
Another view
Another view



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oharaLTD
Posts: 7
Joined: Sat Jan 31, 2009 8:51 pm
Location: Eastern NC
Motorcycle: 1982 1100A

Re: $25 vacuum sync GL1100

Postby oharaLTD » Tue Nov 01, 2011 3:41 am

A more detailed assembly description and supply list would be great.
Previous bikes, 1992 Kawasaki Vulcan 1500, 1985 GL1100 LTD, 1999 V-Star 1100 Custom, 1980 CB750C(hondaline luggage, 900 cams)1986 CB450SC Nighthawk

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virgilmobile
Posts: 7647
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: $25 vacuum sync GL1100

Postby virgilmobile » Tue Nov 01, 2011 10:02 am

The bottles came from Wal Mart.I think they are for salad dressing,cost $1.89 each,there glass.

The tubing,"T" connectors,and valves came from Home Depot.It's 1/4" tubing.1@20' roll $2.89 and a 10' roll $1.89
The valves and T's are in the sprinkler section..T's a bag of 6 $2.59 The valves 2 per bag $2.89

I made my own fittings to fit the carb from some old T fittings(plastic) and hand threaded them right on the bike.

The assembly...I used some old motor oil,It is thick and slow moving.You could use ATF,2 stroke oil,etc.It was easy to see the oil migrate between bottles(a unbalanced carb.

I wouldn't use anything that might damage the engine just in case it should get knocked over and sucked into a running engine.

I used silicone to seal the tubes and cap.the lengths of tubing for every part are exactly the same length.I cut the tubing for the carbs to 6'.
Each link tube is matched length between the bottles.
Here's the pix and measurements.I don't think the lengths of hoses are critical but I believe they should be the same.Feel free to change anything.This is not copyrighted :D
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new82
Posts: 37
Joined: Sun Oct 09, 2011 11:04 am
Location: slidell,la
Motorcycle: 1982 gl1100 interstate/aspencade

Re: $25 vacuum sync GL1100

Postby new82 » Tue Nov 08, 2011 9:43 pm

Hi virgil, I was looking up parts & such & came across someone else who built a pretty nifty cheap 1 gauge sync tool. I like his idea of using a bigger pipe with a screw cap to keep the pieces in. I don't know if I could find the harbor freight $8 gauge he did, but it's likely the same one Wing found for $10 that lists at $15.
http://www.xs11.com/xs11-info/tech-tips/maintenance/carburators/181-home-made-vacuum-gauge-synchronizer.html

I came across vacuum gauges at a pool supply site for $4 - but I'm not sure shipping would make it worth it.

Your Idea about using 3/16 plastic 'T's or couplings to screw into 5mm vacuum ports is excellent - and they also fit fork drain tubes.

btw, I saw your post on "What I do" & I can see how you were able to redo that switch. It probably took you less than 1/2 hour to do what I tried to do in about 6 hours. thanks again - I am amazed. will let you know when I have it installed.
I Also changed the front fork oil using your method - sortof. I couldn't find a pump that would hold all 8 oz. but found an injector that held 2. had to clamp off fill tube with vice grips while reloading. Spilled a little, but I figure better not enough fork oil than too much.

Anyway, I'm getting a bit more comfortable with this wing every time I ride it.

Thanks again

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virgilmobile
Posts: 7647
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: $25 vacuum sync GL1100

Postby virgilmobile » Fri Nov 11, 2011 7:54 pm

I also saw the same.The cheapest vacuum gauge I can find is $24 at HF.With the rest of the parts,it put the price at near$45.
Not that I'm a penny pincher,but you only get one gauge to look at and flip back and forth.With the 4 bottles,I can see the whole engine at one time.
I chose the design because it won't suck in any oil,and I can watch 4 cylinders at one time over the entire adjustment period.

deweyvmartin
Posts: 2
Joined: Mon Apr 07, 2014 1:51 pm
Location: St. Louis, Missouri
Motorcycle: 1981 GL1100 Interstate

Re: $25 vacuum sync GL1100

Postby deweyvmartin » Sun May 15, 2016 1:27 pm

Vigil

I really like your set up and can't wait to build one. Would it be possible to get a good pic of the "t" fitting you connected to the carbs?

Thanks

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virgilmobile
Posts: 7647
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: $25 vacuum sync GL1100

Postby virgilmobile » Sun May 15, 2016 6:08 pm

A couple more pictures.


OK.may still not be clear...
I separate the bottles as left pair and right pair..attaching the vacuum line to each bottle to each vacuum port.This vacuum line does NOT extend into the oil.It stops at the top of the cap.
Between the left bottles (and right ones) there is a valve.It is left open while balancing those two cylinders.The vale in the middle is closed to keep the left and right separated.
Once the left and right pair are balanced.eg equal oil level and bubbling,I open the middle valve and close the two outside ones.This let's the engine draw from left and right on the 2 inside bottles for left/right sync.
Once there balanced I can open them all and watch the levels.They should all remain the same..

User avatar
virgilmobile
Posts: 7647
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: $25 vacuum sync GL1100

Postby virgilmobile » Sun May 15, 2016 6:18 pm

I have also searched low and high for the vacuum adaptors to no avail. I do recall using a plastic coupler.I cut the excess off and hand threaded it into the intake runner.It was a pliable plactic.I don't recall saving them.




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