Carb sync tool STL area

[Guest]

Hey fellow GSR's, I am completely deleted of Moto funds but am close to finishing up my motor rebuild. I need to sync the carbs soon but I have no funds left for a sync tool. Is there a fellow GS guy in the STL area with the tool who would be willing to help me out? If so, pleas shoot me a PM.

Thanks!

 

[OriginalOwner]

Hey fellow GSR's, I am completely deleted of Moto funds but am close to finishing up my motor rebuild. I need to sync the carbs soon but I have no funds left for a sync tool. Is there a fellow GS guy in the STL area with the tool who would be willing to help me out? If so, pleas shoot me a PM.

Thanks!

You can build one for less than $5 bucks.

http://www.powerchutes.com/manometer.asp

:dancing:

 

[BassCliff]

Hi,

You can build one for less than $5 bucks.

http://www.powerchutes.com/manometer.asp

:dancing:

Good luck with that.


Thank you for your indulgence,

BassCliff

 

[OriginalOwner]

Hi,




Good luck with that.


BassCliff

Elaborate Cliff.

 

[dorkburger]

I detect sarcasm.....

 

[Riding Again]

+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...............

 

[OriginalOwner]

I detect sarcasm.....

Me too.

I've never tried it or seen it but the interwebs is full of designs and those that swear by them.

This one any better, Cliff?

http://www.fz6-forum.com/forum/how-tos/39891-build-your-own-manometer-throttle-body-sync.html

I'm in the process of rebuilding my carbs and don't own a manometer, so I was gonna try this. Cliff?

 

[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...............

Hahaha, I'm starting to get it.

That's why they tell you to use 2-stroke oil, so when it gets sucked into the carb, it won't hurt really anything.

But, I bet because 2-stroke oil is lighter, it'd probably require even more height.

Guess I better hit up my buddy to borrow his meter.

 

[Guest]

Exactly. I had a thought about building one and already scratched that hence my request. There's gotta be a fellow GSer that can lend a hand.

Thanks guys!

 

[Andrew Vanis]

Hahaha, I'm starting to get it.

That's why they tell you to use 2-stroke oil, so when it gets sucked into the carb, it won't hurt really anything.

But, I bet because 2-stroke oil is lighter, it'd probably require even more height.

Guess I better hit up my buddy to borrow his meter.

That is why the details of these home made ones say to put restrictors in. Most folks use welding tips on minimal diameter in the lines. This also provides reading dampening.

Before I met you guys (GSREsources) I bought a Motion Pro blue liquid synch off Amazon for $40 shipped. Was worried about sucking liquid as others WARNED me about. Actually, I had no such issues and it worked extremely well. The Motion Pro uses restrictors (you can see them in Image2 here - http://www.rockymountainatvmc.com/docs/MP SyncPro.pdf)

 

[OriginalOwner]

Here's some different designs.

Any better?

http://faq.ninja250.org/wiki/How_do_I_synchronize_the_carburetors?#The_two-bottle_method

 

[Steve]

Here's some different designs.

Any better?

http://faq.ninja250.org/wiki/How_do_I_synchronize_the_carburetors?#The_two-bottle_method

I only saw designs that might work on twins, nothing for the Fours.

There are some who say that you can balance two carbs, then the other two, then balance the pairs, but they have evidently never seen all four vacuum levels at the same time. When you make one adjustment, it affects all four readings, so if you only balance two (because you can't see the other two), then switch, you simply won't really know what's going on.

.

 

[Gorminrider]

Here's some different designs.

Any better?

http://faq.ninja250.org/wiki/How_do_I_synchronize_the_carburetors%3F#The_two-bottle_method

better! You won't suck stuff into your carbs if you make sure the total of all the liquid doesn't overfill one bottle..Then, divide that among the bottles.
I made one with "stuff" and it seems to work fine on my twin-you can really see the fluid levels change, but not so fast as to make adjustment impossible.... The tricky bit was drilling some threaded length of bolt to suit the vacuum ports .Make these drilled bolts long so you can be sure to create a good seal.
Make the vacuum hoses long enough so you have lots of options as to placing the contraption. I taped the bottles to a board so it's more stable.I used wine corks in soft drink bottles... green ones-not ideal,but what I had and fluid(ATF) level is plain enough.
Don't use plastic pop bottles. They will collapse! haha.
You can test how good your seals are on the contraption by switching the vacuum lines around on the bike....Result will be the same if the seals are ok. I never got the fluid to stop moving a little bit, especially when tightening the lock nut on the carb...but it can be slowed to boredomlevel discerning a change and that's close enough...?

I didn't make the vacuum lines long enough! I don't drink Perrier! and why is it popular? oh well ...

 

[JTGS850GL]

How on earth would you read that contraption?

 

[OriginalOwner]

How on earth would you read that contraption?

I believe you are just looking at the level difference and adjusting to make them even.

:-k

 

[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.

 

[Guest]

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? :-k

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. :-\\\

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