Carb sync tool STL area

[JTGS850GL]

Doesn't seem too precise.

[Gorminrider]

....fluid moves one bottle to another depending upon the vacuum of the manifolds each bottle is attached to. As you adjust the throttle synch screw, you will see the levels change...a slight turn is all it takes to make fluid go back or forth. Ideally, vacuums are equal in all the carbs so fluid doesn't move, but it's pretty sensitive.

it doesn't LOOK too precise, but the principle is ok

( if you can accept the tiny variation that an unequal vacuum will cause by the connection...ie: where one carb sucks harder, the dropping fluid itself adds slightly to the vacuum of the weaker carb's manifold some minute turbulence ..some tiny bit of carburetor vapour moving towards the weaker bottle but an increment of throttle adjustment sets the fluid going the other way ...however, when vacuum IS equal, no fluid can move)

[Gorminrider]

...It's Perrier Precision is all.Still,if it isn't "precise" there would be a large flat spot of inertia where the fluid doesn't move while twisting the throttle adjustment screw backnforth...how large a "large" flat spot would be is open to query... When I used it on two bikes, it seemed to never actually stabilise inside a very narrow pitch of thread adjustment - I lost patience going from side to side of what seemed to me to be "too small to call" given the other variations I expect to be present somewhere.

[Sci85]

As much as I enjoy all the creativity, I really am just looking for someone in my area that might would be willing to spend a couple hours helping me out. I'll buy the suds.

C'mon fellow Missourians, where are you guys?

[Steve]

....fluid moves one bottle to another depending upon the vacuum of the manifolds each bottle is attached to. As you adjust the throttle synch screw, you will see the levels change...a slight turn is all it takes to make fluid go back or forth. Ideally, vacuums are equal in all the carbs so fluid doesn't move, but it's pretty sensitive.

OK, if I am reading this right, when the carbs are synched, the fluid stops moving, but the levels won't necessarily be even?

With the apparent volume in those bottles, you could have quite a bit of movement that could not be easily seen.

Thanks, but I will stick to my very hazardous Mercury sticks for now. If and when they stop working, I'll get a Carbtune.
Not sure how much life is left in my Mercury sticks, I have only had the set for 33 years.

.

[Gorminrider]

OK, if I am reading this right, when the carbs are synched, the fluid stops moving, but the levels won't necessarily be even?

With the apparent volume in those bottles, you could have quite a bit of movement that could not be easily seen.

Thanks, but I will stick to my very hazardous Mercury sticks for now. If and when they stop working, I'll get a Carbtune.
Not sure how much life is left in my Mercury sticks, I have only had the set for 33 years.

.

A store-bought manometer would be nice to have.
and that's right, this project won't necessarily be even unless you get them close before tweaking but that's not at all hard to do.
I suppose because Air is compressible a big difference in air volumes might also affect fluid inertia-and make "synch" a moving target. Taller columns would also improve it as to "time waiting" to see change.

(maybe I will put some barometers in sealed jars for a "dial-display" instead!)

[Steve]

Seriously, for all the time and effort that can be put into creating something, revising it, refining it and finally giving up on it,
just how long would it take to save up the $110 or so to buy a Carbtune?

.

[OriginalOwner]

+1 Bass.

That'll work if you're pretty close to begin with. If you happen to be off (I have ) the difference in the mercury level can be 10 inches. Not bad you say, the homemade job will work. The density difference between mercury and water/oil is 13.6x greater for water and 15.3x for oil. That makes a needed length of about 136 to 155 inches !!!

Hope you have the height to run it, otherwise you'll be cleaning the fluid out of the carbs, cylinders, repairing valves...............

Sci85> any luck yet? Too bad we're not closer because:

I actually found my old Motion Pro carb balancer (like the pic) in the back of my garage -- only I don't think there's any mercury left inside. Probably got turned upside somewhere along the years.

So, other that having a potential superfund site in the back of my garage, can I use an alternative liquid in place of the mercury?

Or is it the density of the mercury that makes it work right?

[Steve]

So, other that having a potential superfund site in the back of my garage, can I use an alternative liquid in place of the mercury?

Or is it the density of the mercury that makes it work right?

Sorry, but it is the density of the Mercury that makes it work right.

Not sure if you can still source any Mercury, let alone at a reasonable price.

If you can't find any, would you consider parting with the remnants of the gauge?

.

[dorkburger]

Sorry, but it is the density of the Mercury that makes it work right.

Not sure if you can still source any Mercury, let alone at a reasonable price.

If you can't find any, would you consider parting with the remnants of the gauge?

.

Im an hvac tech...I oocassionally replace old mercury bulb thermostats..Most hvac supply houses have a box in the store to drop off old stats for disposal.......just sayin.

[OriginalOwner]

Sorry, but it is the density of the Mercury that makes it work right.

Not sure if you can still source any Mercury, let alone at a reasonable price.

If you can't find any, would you consider parting with the remnants of the gauge?

.

I remember a friend had a mason jar full of mercury on his desk at his trans shop -- thing musta weighed 30 lbs. But, even if he still has it, I'm not sure if I even wanna mess around with mercury anymore.

Of course as kids, we used to play with it, roll it around on paper, break it up with our fingers, make it reform into one glob -- maybe that's why we're all messed up now, heh!

I'm gonna see if I can make some sort of restrictor for it -- maybe I can still use it -- if not, sure Steve, you can have it -- but it's old and pretty beatup.

I'll let you know.

[Steve]

... if not, sure Steve, you can have it -- but it's old and pretty beatup.

I'll let you know.

Just let me know when and how much.

.

[Steve]

Im an hvac tech...I oocassionally replace old mercury bulb thermostats..Most hvac supply houses have a box in the store to drop off old stats for disposal.......just sayin.

That would be one possible source. It takes quite a few thermostats to fill the gauge, though.

.

[Sci85]

Doubtful you can send mercury through the mail.

And no, I never got a reply from anyone in the area. I'm sure they are going to be way off. Unfortunately, I just don't have the hundred bucks left to buy one. I will eventually but not for awhile. I hope to have the bike ready for running this weekend. Can;t ride though yet as I broke my stinking shifter linkage the other day and of course, the 550 katana rod was a one off piece that's no longer available. Doh!

[GateKeeper]

If you were closer, I could persuade Spyug to lend you his or at least come over and help out, but we are far away and not so quick to get out to you....

but we do work for suds.....that would have been the best part...

Hope you find a source for one soon......