Carbtune Synchronizers

[eltoroloco]

has anyone had any problems with the Carbtune synchronizer from Morgan. I'm looking to buy. i'm getting tired of paying my mechanic to sync my carbs.

Also, is there any other good synchrnizing tools out there, i'm having a hard time finding anything others.

Thank you for any advice you can give me.

[randy]

Motion Pro makes a good economical set for about $40. Dennis Kirk has 'em.

Randy

[eltoroloco]

how easy are they to use, a friend of mine has one that you have to balance all four gauges on 1 cylinder before every use. is the one from dennis kirk like that.

[dragxs11]

I have the yellow Motion Pro model, I think it was a step up from their base model. You can hang it from the handlebars...the only annoyance might be that it uses mercury, so you have to make sure you don't blip the throttle or it will get sucked in. Works well though. Easy to use. It becomes evident that the shops charge a couple hours labor for something that only takes about 20 minutes.

[Bill__Woods]

I just got a really nice set of Sycronizers from jcwhitney.com. They are the four vacuum gagues with dampners, mounted to a rack. They were 50 or 60 dollars. The Quality of the Gauges is excellent, and I will recommend them to everyone!
I did not want the mercury sticks because I would probably spill them.

[pgg]

Toro, here's a pic of a vac gauge set I use. Picked it up for $85.00.

http://homepages.inspire.net.nz/~patrick/DSC00080.jpg

[xssiveone]

Originally posted by pgg
Toro, here's a pic of a vac gauge set I use. Picked it up for $85.00.

http://homepages.inspire.net.nz/~patrick/DSC00080.jpg

This is the same set I have. I got it a few years back, think it was from JC Whitney in the US. I didn't want to mess with the mercury, even tho the mercury is probably more accurate then the mechanical gauges. My own personal opinion is "I'm not building a race engine, so the gauges are close enough."

[Bill__Woods]

Those are the same gauges i just got from JCWhitney. They are just as accurate as the mercury sticks.

TECH TIP: Find an old stand up ocillating fan that is broken, remove fan & motor. Use Fan Stand to hold the Carb Synch gauges and your aux fuel tank.

[xssiveone]

Originally posted by Bill__Woods
TECH TIP: Find an old stand up ocillating fan that is broken, remove fan & motor. Use Fan Stand to hold the Carb Synch gauges and your aux fuel tank.

Hmmm... now that's a good idea. I don't have a ceiling in my garage so I have been hanging mine from one of the rafters with a bungie cord. Hopefully, this fall will see that closed in and some insulation put up, so will have to adopt a method such as you describe.

The only thing I can complain about with those gauges is the rubber tubing that comes with them. I've had mine about 3 years I think, and the tubing started to split this spring so I replaced all of it. Not a big deal, think it was only $8 or so, but thought it should have lasted longer.

[beechfront]

same guages i have - work great. very easy to do.


20 min tops

[UncleSpot]

...are there instructions for the 'correct' use with the gauges? Or is it 'detailed' in a shop manual? ...I've only owned one carb bikes and my 1980 XS1100 SG is my 1st multiple carb bike. I've rebuilt engines and old carbs multiple times since 1970 but have never had to 'sync' multiple 'setups'

[sixtysix]

I have the Morgan carbtune and feel it is well worth the extra $$ to get one. Once in a while one of the rods stick and I need to flick it with my finger. If you have other bikes that require an adapter the carbtune comes with them.

[xssiveone]

Originally posted by UncleSpot
...are there instructions for the 'correct' use with the gauges? Or is it 'detailed' in a shop manual? ...I've only owned one carb bikes and my 1980 XS1100 SG is my 1st multiple carb bike. I've rebuilt engines and old carbs multiple times since 1970 but have never had to 'sync' multiple 'setups'

No, no instructions for specific m/c's that I can recall. Procedure is similar for all makes and models tho, not difficult. And it is detailed in the repair manuals as well. First, warm the engine to normal operating temp. In between each carb is an adjustment screw on the throttle plate (butterfly) linkage. Adjust carbs 1 and 2 so they are giving the same vacuum reading, then adjust carb 4 to carb 3. Carb 3 is actually unadjustable. Then, with the screw between carb 2 and 3, adjust carb 1 and 2 as a unit to carbs 3 and 4. And, there's been some confusion with how much vacuum each carb should draw... it doesn't matter. The point is to get them all drawing the same amount, or as close as possible. The gang of gauges that are marketed as snyc gauges are just automotive gauges, hence the coloured bands on the face of the gauge. Ignore the coloured bands, and just pay attention to the needle reading.

And, you might want to consider aiming a fan at the engine while you are doing the sync to keep some air flowing across it.

And, if you have them off for cleaning, you might want to do this before you reinstall them:
Bench Sync It's in the Tech Tips on the left of your monitor. They will still need to be sync'd with the gauges, but this will get them close enough to run.

[UncleSpot]

Brian, this was *exactly* what I needed - thanks. Now I've just got to settle on which carb sync system I'm gonna get...
This is going to be a project in early Oct. when the temp.s get lower - they're in the triple digits right now...
I like to ride year-'round, but it's a lot easier to work on the bike when it's a bit cooler in the afternoon... and right now it's running TOO well to 'fix' it...

[tommystinson]

I've got the Carbtune II set as well. I received the ballistic nylon case with it and it is extremely high quality. Mercury gauges can be a pain, and these seemed to be a good alternative. They cost me $110 or so, after the pounds are converted to dollars. With a conventional "pro quality" set going for around $80 with tax and shipping, I think they are worth the extra $30. You could "loan" them out to friends in exchange for beer or something and make it an investment.