Carb syncronizer/manometer choices

[QuarterHorse]

Re: Home made carb sync tool

Thanks fellas, beats spending the $80 + bones on one.

 

[Robbarrie]

Re: Home made carb sync tool

HQ great job and thank you for sharing this. Can you or someone explain the how you actually sync the carbs with this. Sorry but I've never done them before so its all new to me.

Just wondering though - Have you tested the homemade guage verses a real one - just to see how acurate it is ? IF NOT. Is there anyone out there has a set...would they be willing to make one of these to test it to see how close it is to the real thing ?

You say this works and does it well, if so you are a very good backyard engineer. I'm not joking and I do mean it as a compliment. Its a simple concept but how many of us would have put this together and made it work ? briliant, good job :clapping: :thumbs up: :cheers:

 

[Bill Seward]

Re: Home made carb sync tool

Reminds me of a hookah I made back around 1967.
Did a good job of synchronizing my brain, if I remember:whistlin:

 

[Bill Seward]

Re: Home made carb sync tool

But it is a brilliant idea! Thanks for posting it.

 

[QuarterHorse]

Re: Home made carb sync tool

Haha thanks guys. It's so simple, it has to work. Think of an engine as a big air pump. This pump creates vaccum. All that tool does, is equalize how much vaccum the carbs are pulling, or "syncing" them.

To sink the carbs, you have the sync needles on the bike. First you sync carb 2 to carb 1. These are on the left side of the bike. Plug the tool into the vaccum ports, plug v-boost in if it isn't, and start it. When out of sync it will start pulling water from one bottle to the other, whatever carb is pulling more vaccum. You run the adjustment screw so the water level is even to both carbs. Rap the throttle a few times, make sure it doesn't change (It's VERY finicy) and your set.
Same process for carbs 4 to 3. Then you hook carb 2 to carb 4 to the tool, and set both banks. They say set your idle before you sync, I did mine after. If the bike is way out, the idle will change anyway.
Hope that helps.

 

[Smackdown]

Greetings,

I thought this question must of been asked previously, but a search turned up nada.

Can anybody recommend a reliable, easy to use, accurate synchronizer tool? Some tools seem to use metal rods, are they better? Can you synch the carbs with a vacum unit?

I've tried to research this, but the answers are confusing.

I'm willing to consider anybody's favorite synch tool recommendation.

thanks,

Smackdown

"Opinions will vary"

 

[MSGU1-4936]

Re: recommend a carb synchronizer

I use the Carbtune, good instrument, accurate, easy to use, uses the metal rods. If you look through the carb section you should find lots of other models that are available, as well there is a tread that tells you how to make your own.

Ron

 

[serrow]

Re: recommend a carb synchronizer

I just bought and returned the MotionPro non mercury version. $100 for a piece of crud. the fluid levels were all screwed and I had to wait 6 weeks for a refun from Motorcycle Accessory whouse to return my dough.

This morning, i tried out my home made manometer, but i need more robust tubing (tried fish air-line) since it wanted to collapse on itself. the oil ended up frothing which made the levels a bit cumbersome.

I am going to try to see if repairning a diaphragm or 2 makes things better, but also going to buy the twinmax. yes, it only manages 2 vacuum ports at a time, but since we're syncing to cylinder 1 anyway, this is really the best way to make sure they really are all the same.

looks to be a good tool, and some good write ups in the venture boards.

 

[jkyle187]

Re: recommend a carb synchronizer

I use TechMate's Carbmate to sync my carbs. I love this balancer. Its one of the best tools i have ever bought.

 

[serrow]

Re: recommend a carb synchronizer

http://www.vacuummate.com/carbmate/ interesting, I also saw it branded by motion pro. does it still require you to use jumpers, or have they installed a battery?

they also have a 4 carb adapter, but it looks just like a switch.

 

[hubeerjw]

Re: recommend a carb synchronizer

Hey Smackdown, how is the exhaust?

I purchased the Carbtune II a while back and I don't have much to compare it to, but it worked great. They shipped it very quickly, but you better hurry if you are buying it from overseas... the USD is rapidly decreasing in value. I'm not sure how sensitive the Carbtune is, and I know it is calibrated from the factory, but I could always ship you mine and let you use it for a while... just need to package it up well... I would think I could get it to you for $5 or $10?

I think quarterhorse built his own an posted how to do it.

When are you going to share your t-boost switch secret with us?

 

[4gasem]

Re: recommend a carb synchronizer

http://www.vmaxforum.net/showthread.php?t=1825&highlight=manometer

http://www.vmaxforum.net/showthread.php?t=1382&highlight=manometer

http://www.vmaxforum.net/showthread.php?t=2111&highlight=manometer

http://www.vmaxforum.net/showthread.php?t=2180&highlight=sync

http://www.vmaxforum.net/showthread.php?p=14155#post14155

I found these 5... :thumbs up:

 

[Smackdown]

Re: recommend a carb synchronizer

Hello Hubeerjw,

The new exhaust is great. Of course I haven't needed to use it yet, being a just-in-case spare and all (just-in-case I get stupid and dump the Max over..!!!). I did use some hi-temp flat black header paint from the Eastwood company (best coatings ever , IMO) to touch up the painted part of the muffler assembly. I polished up the chrome on the buffing machine. Now they are hanging in the rafters waiting to be used. I also waxed them as a rust preventative, but I'll clean that off if/when I use them.

As far as the vboost secret is concerned, I will post directions whenever my youngest son can show me how to post a wiring diagram.

The vboost "secret" is simply that I wired my vboost to my horn switch. Anytime I hit the horn button (at 2K+ rpm) it kicks on the vboost. Of course, I don't have a horn anymore, but I never did use it anyway. It's just that the exact placement of the stock horn switch is perfect for me. I can keep a good grip while rocketing the vboost. I guess I could have added a switch below the horn button, but that is just a little further than I want to reach. I would have to sort of release my grip a little to reach an added switch, while I don't have to compromise my grip using the horn switch. If you wanted to mount a separate switch, any 12V "momentary" switch would do, so long as you could make it fit in a location you like.

Just reading that I wired my vboost to my horn button, quite a few of you savvy wiring guys could figure out this mod without any detailed instructions from me. But I will post the mod soon.

Thanks for the offer to let me use your carb sync, but I don't know when this winter I will get around to doing this job. I think I will continue to gather some more opinions and eventually purchase one.

Smackdown

 

[RagingMain]

Re: recommend a carb synchronizer

I bought the Carb Tune II and it is pretty awesome. Can compare all 4 cylinders at once, hangs on the handle bars, easy to read, reacts very quickly to adjustments. Was able to sync my carbs with in .5mm hg with it. I highly reccommend this one
Cheers :cheers:

 

[Lew L]

Re: recommend a carb synchronizer

+1 on the CArbtune II. Can sync the carbe in just a few minutes and non of the mercury to leak or evaporate away:surprise:

Lew

 

[one2dmax]

Re: recommend a carb synchronizer

rookies












Sorry had to do that - LOL!

I have heard the carbtune 2 does work well. I have used my digital unit for sometime now and won't use anything else. Of course for most a $600 unit is way more then they would ever need.

Sean Morley

 

[hubeerjw]

Re: recommend a carb synchronizer

rookies

Sorry had to do that - LOL!

I have heard the carbtune 2 does work well. I have used my digital unit for sometime now and won't use anything else. Of course for most a $600 unit is way more then they would ever need.

Sean Morley

Rich Old *******s.....

Sorry, had to do that too...

I'll bring my CarbtuneII out and compare it to your digital sometime. I would be nice to know how close it gets.

Cheers,

Jeff

 

[one2dmax]

Re: recommend a carb synchronizer

LOL! Its all about being in the right place at the right time with the right amount of money to give some goober that is willing to get rid of it.

Sean

 

[gleno]

Re: Home made carb sync tool

I had to build one and try it out. Here is my effort.

Material cost <$10. Baby bottle has milliliter calibration on side and the teat was cut off to provide a pressure seal under the screw cap. The aluminium tube was a leftover from a fuel rail project. Internally sealed with silicon casket maker.

It works brilliantly. Try it yourself.

 

[vmaxinID]

Re: Home made carb sync tool

Where do you load the bowl?
:smoke000::coolgleamA: :whistlin: