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View Full Version : Carb sync gauge question...



DavidofColorado
Mon Jun 8th, 2009, 05:57 AM
Here is the synchronizer (http://cgi.ebay.com/ebaymotors/Vacuum-Carburetor-Synchronizer-carb-sync-Gauge-sc2_W0QQcmdZViewItemQQ_trkparmsZ65Q3a12Q7c66Q3a2Q7 c39Q3a1Q7c72Q3a1171Q7c240Q3a1318Q7c301Q3a1Q7c293Q3 a2Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZitem 3351fe8ba5QQitemZ220418968485QQptZMotorsQ5fAutomot iveQ5fTools) that I am looking at just because its so damn beautiful. But I was wondering if I should go with one of the cheaper (http://motors.shop.ebay.com/__?_from=R40&_trksid=p284.m38.l1313&_nkw=Carburetor+Synchronizer&_sacat=) ones that are half the cost or just depend on the kindness or fellow bikers and borrow theirs until I am rich and can buy my own.
What do you think?

What would you do?

brennahm
Mon Jun 8th, 2009, 08:29 AM
I personally like the ones like This one. (http://cgi.ebay.com/ebaymotors/RACEPRO-MERCURY-CARB-CARBURETOR-TUNER-SYNC-SYNCHRONIZER_W0QQitemZ200342553705QQcmdZViewItemQQ ptZMotors_Automotive_Tools?hash=item2ea558c469&_trksid=p4506.c0.m245&_trkparms=65%3A12%7C39%3A1%7C72%3A1171%7C240%3A131 8)
Still pricey though.

BHeth
Mon Jun 8th, 2009, 08:39 AM
Since you aren't rich, you could build one for a few bucks. Then you can be the kind biker.:) The second link explains how to use it on a four cylinder. I haven't made one, but if you search the net you can find plenty of happy people.

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

http://www.r6messagenet.com/forums/r6-maintenance-technical/42890-instructions-carb-sync-tool-5-00-a.html

http://www.airheads.org/content/view/183/98/

DavidofColorado
Mon Jun 8th, 2009, 03:28 PM
I personally like the ones like This one. (http://cgi.ebay.com/ebaymotors/RACEPRO-MERCURY-CARB-CARBURETOR-TUNER-SYNC-SYNCHRONIZER_W0QQitemZ200342553705QQcmdZViewItemQQ ptZMotors_Automotive_Tools?hash=item2ea558c469&_trksid=p4506.c0.m245&_trkparms=65%3A12%7C39%3A1%7C72%3A1171%7C240%3A131 8)
Still pricey though.

I like it too, and it looks the ones I have used in the past. It seems overpriced though I have seen them cheaper in the past.


Since you aren't rich, you could build one for a few bucks. Then you can be the kind biker.:) The second link explains how to use it on a four cylinder. I haven't made one, but if you search the net you can find plenty of happy people.

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

http://www.r6messagenet.com/forums/r6-maintenance-technical/42890-instructions-carb-sync-tool-5-00-a.html

http://www.airheads.org/content/view/183/98/
I have looked at those in the past and I think I can see how they work. But, I want one that isn't so messy. I want one with regular gauges and I think one like the ones listed can be build on the cheap too. But the adapters for the carbs is the only thing keeping me from trying.:crazy: Where do you find those? Mine have 3 holes that need an adapter screwed in and the last has a nipple that the hose slips over.

I'm still just trying to do things on the cheap right now.

Jim_Vess
Mon Jun 8th, 2009, 03:28 PM
I have this one:

http://www.motionpro.com/motorcycle/partno/08-0411/

Works great. You can find it on-line for around $75.

derekm
Tue Jun 9th, 2009, 01:00 AM
I've been using the same basic less $$$ motion pro for close to a decade now!

Sortarican
Tue Jun 9th, 2009, 04:12 PM
Make your own for a couple bucks.
For those of us that are too cheap to buy a carb sync tool and don't have the option to borrow or rent one, here is how to make one.

Materials you will need:

- A large wooden board. Mine was 4' tall and 1' wide.
- 24' of hose that is either 3/16" or 0.17" inner diameter. My hose's outer diamter was 1/4"
- Yardstick (optional)
- 4 1/8" hose menders. These will hook your carb sync tool to the bike.
- 2 T-fittings to connect your hoses. My t-fittings were quick disconnects for use with hoses that had an outer diameter of 1/4"
- Something to secure your hose to the board.


Overall materials
http://i37.photobucket.com/albums/e86/Robb235/HPIM0619.jpg

1/8" hose menders
http://i37.photobucket.com/albums/e86/Robb235/HPIM0620.jpg

T-fittings
http://i37.photobucket.com/albums/e86/Robb235/HPIM0621.jpg

0.17" ID hose
http://i37.photobucket.com/albums/e86/Robb235/HPIM0622.jpg



Now that you've got your materials, cut your hose into 4 equal pieces of 6' each. You will also need a 3" piece of hose to connect your two t-fittings together. Route the hoses as shown in the picture below:

http://i37.photobucket.com/albums/e86/Robb235/HPIM0623.jpg


Place the hose menders on the tips of your center hoses. Don't put any on the end hoses yet because we still need to put oil in your carb sync tool:
http://i37.photobucket.com/albums/e86/Robb235/HPIM0624.jpg


I used two stroke engine oil in my carb sync tool, that way if something should happen and the engine sucks it up it won't do any harm. It also gives it a cool green color. Automatic transmission fluid will work to and gives it a nice red color.

Now, to put oil in the carb sync tool, put one of the end hoses into your container of oil. Put the other end hose in your mouth. Block off the center two hoses (the ones that have the hose menders on them) with your thumbs. Now suck on the hose that's in your mouth and you should draw oil into your hose. After you've got enough oil in there, stand your carb sync tool upright so that all the oil flows to the bottom and evens out, as well as letting any air pockets rise to the top.

Go ahead and put the hose menders into the end hoses.

Your carb sync tool should look something like this:
http://i37.photobucket.com/albums/e86/Robb235/HPIM0628.jpg


Here's what my carb sync tool looked like after I adjusted the throttle bodies. My carb sync tool was extremely sensitive and this was the closest I could get them together:
http://i37.photobucket.com/albums/e86/Robb235/HPIM0626.jpg
__________________

DavidofColorado
Tue Jun 9th, 2009, 05:03 PM
Sortarican, did you sync them all with the one giving the lowest reading? Or what?
I have a quality control worry. Did you switch around the hoses but this time to see if the readings didn't change? Just wondering.
Thanks for the great write up. I was hoping to get some feedback from you on this though.

Jim_Vess
Tue Jun 9th, 2009, 08:32 PM
One of the carbs/throttle bodies should be non-adjustable (it's the #3 carb/TB on Yamahas). The others are adjusted to match the level of that carb/TB.

Knuckle Dragger
Tue Jun 9th, 2009, 10:29 PM
http://www.ascycles.com/detail.aspx?ID=2146

Been using this and can do the job in about five minutes with no fluid to mess with so simple will never give this one up.

DavidofColorado
Wed Jun 10th, 2009, 01:12 AM
Well I'm going to do the carb overhaul first. I need better milage out of this bike. Then I will do the sync'n. Thanks everyone for your help.

DavidofColorado
Wed Jun 10th, 2009, 11:27 PM
Here is the plugs when i checked them.

A couple are pretty fouled up.

They are from left to right 1-2-3-4 cylinders

Number 3 looks fouled for sure. None smelled like gas or were wet when I pulled them.

http://img521.imageshack.us/img521/4224/dsc01117.th.jpg (http://img521.imageshack.us/my.php?image=dsc01117.jpg)
http://img189.imageshack.us/img189/7647/dsc01118i.th.jpg (http://img189.imageshack.us/my.php?image=dsc01118i.jpg)
http://img41.imageshack.us/img41/976/dsc01119m.th.jpg (http://img41.imageshack.us/my.php?image=dsc01119m.jpg)