Topic: recommendation on carb sync tool

[evinrude7]

any recommendations on a carb sync tool for a 4 cyl that won't break the bank without sacrificing quality? 

[gtmdriver]

I've used the quite pricey Morgan Carbtune and a cheap set of 4 vacuum gauges and got equally good results with both.

[Deltarider]

My experience is that manuals are right in their advice when they say it's not worth the expense unless you have several bikes. A set of vacuummeters is good in a workshop so you don't have to remove the carbrack and can save time and costs for the customer. I can benchsync my carbs within 2cm Hg and that's well within factory specs. In a playful mood I bought a set in the 80s and shared the expense with a friend. I have donated it and it's now at a friends workshop for the benefit of more than just us. So my advice would be: see if you can share one or have it done by a dealer who should not charge more than half an hour max. Remember: synchronisation is seldomly required except for maybe the first 750s that had cable operated carbs. Normally you can ride tens of thousands of miles without a sync. Not to mention that many think a sync is needed where in fact there's something else the matter (often the ignition). Which would be detected by a trained mechanic.

[DaveBarbier]

I think most members use the cheap 4 gauge sets and are happy with them. As long as they're calibrated to one cylinder then they should be fine. I have a motion pro blue liquid tool. It works ok, but I don't like the liquid. I have to be careful that it doesn't suck up the liquid and I have to keep it upright. Kind of a pain.

[DaveBarbier]

I can benchsync my carbs within 2cm

How do you know if you don't sync with a tool? Do you always verify with the tool to be sure or did you test it once back in the 80's and it was within spec? Might be a good idea to sync again and see if the 2cm/hg tolerance is still true.

[kerryb]

I use the motion pro 4-Guage set-up.  Very happy with results i've been able to achieve.  Now if I could just get my mixture screws to make a difference (goldwing)  I'd feel much better.

[ekpent]

 Deluxe Morgan Carbtune with pouch is around $78.85 shipped to the USA right now. Price is lower now then when I bought one a few years ago.  http://www.carbtune.com/

[Duke McDukiedook]

The Morgan carbtune is the way to go if you are going to invest in a synch tool. The motion pro is not designed for bikes above 500cc, ask me how I know.

[evinrude7]

how do you know duke?

[evinrude7]

and what are the little T connectors for that i see in the kit?

[flybox1]

This.
http://www.saber-cycle.com/store/product859.html

Its lasted me nearly 10 years.   The black connectors are cutoff valves to quiet the gauges needle bounce.
Takes all of 2 minutes to calibrate these and it comes with the ($20) motion pro carb tool.

[Stev-o]

I have the Honda factory set...

[Duke McDukiedook]

how do you know duke?

SSSSSSSSSSSUUUUUUUCK!! Bye Bye fluid! I ordered a replacement bottle of fluid and a Morgan Carbtune after that sucktacular event.
I'll sell ya mine for $50 bucks if you are desperate to try it (the motion pro).

[Johnie]

Been using the Morgan forever and great for the fine tune. In all honesty I have not tried anything else, because the Morgan was the recommendation from this board years ago. Mine came with the brass tubes. I think they come with plastic now, but to have the brass extension tubes for carbs 2 & 3 make it a lot easier to use.

[Deltarider]

How do you know if you don't sync with a tool? Do you always verify with the tool to be sure or did you test it once back in the 80's and it was within spec? Might be a good idea to sync again and see if the 2cm/hg tolerance is still true.

Easy enough. I still have the 4 meter set at my disposal, ten minutes from here. In the 37 years I own my bike I have had the carbrack 3 times on the kitchentable, mostly out of curiosity and also to clean passages after a long hibernation. Everytime I managed to sync within 2cm Hg which is pretty good. If I do it dynamically with the meters connected it will cost me half an hour to get it likewise good. There's nothing special about a vacuum meter set. Remember it's in the workshops to save labour/time/costs.
Tip: do not check calibration by connecting all 4 meters to one cylinder at the same time. You'll get different readings. When I did this once, I concluded my meterset was out of calibration but I was wrong. It was still OK. You can check however one after the other or by connecting them to a non dynamic vacuumpump.

[catsoup]

I bought the blue liquid motion pro one from someone on the forums here, the price was right and I wasn't thinking super long term. That said, it has worked flawlessly for at least five years. when I first bought it (used) I ordered the refurb kit from motion pro (blue liquid and new o-rings) I think it was 6$ worked great. Since then I have just replaced the o-rings when they needed it from my box of rings, and I have used antifreeze in lieu of the motion pro liquid. mine had the inline buffers so not a lot of sucking/wobbling, never lost any fluid as long as you follow the directions (CB750F)

no issues at all. it gets easier to use after the first few times and has been reliable and durable. Im sure there are better ones out there, but it was CHEAP!

[carnivorous chicken]

Another one for the Morgan Carbtune. I've had mine for a year now and am convinced.

Prior to that I had a mercury set. Liked that a lot as well, but had to be much more careful. I can travel with the carbtune.

And I would not recommend the motion pro blue liquid tool. It develops bubbles and is just a POS.

[jaguar]

Another vote for the Morgan Carb Tune.
With the british pound in the toilet they should be fairly cheap too.

[Brian G]

+1 on the Morgan Carbtune. I even use it to do the CBX (4, then the other 2 set to one of the first 4). I wish I had Deltarider's fine touch on the bench. I thought the 400's carbs were close but after starting, the engine had a pronounced clutch knock which disappeared after putting it on the gauges.
Regards,

[PeWe]

+3 for Morgan....   Bench method work good too. I did that during the 80's. I do not remember a real carb synch with gauges.
I used a drill  to be fitted under 1 throttle, just exact enter under it scraping a little. Then set the other 3 in the same way. See the light thru it worked fine too.
 From inlet side,  hold the entire rack and see the daylight under each throttle, just a very small ray of light coming thru under each throttle. That worked fine too. My VM29 had no vacuum outlet. K6 carbs got same treatment.

Morgan tune kit for my newer carbs 2015. Very easy to compare 4 carbs at the same time with Morgan

[Jimray23]

http://www.bikebandit.com/manuals-tools/motorcycle-tools/motorcycle-hand-tools/motion-pro-sync-pro-carburetor-synchronizer
Watch the video/follow direction, it will do a good job, ships from U.S.. no customs issues.

Jimmy
1979 kz1000 ltd mkii
     dyna s ignition, dyna 3 ohm coils, solid copper core plugs, full rewire.

[ekpent]

http://www.bikebandit.com/manuals-tools/motorcycle-tools/motorcycle-hand-tools/motion-pro-sync-pro-carburetor-synchronizer
Watch the video/follow direction, it will do a good job, ships from U.S.. no customs issues.

Jimmy
1979 kz1000 ltd mkii
     dyna s ignition, dyna 3 ohm coils, solid copper core plugs, full rewire.

Carbtune is over 10 bucks cheaper delivered then that big thing and no custom worries for us in the states. When I ordered mine it was around Christmas time a few years back (Thanks wifey) and it arrived to me in less then a week if I remember correctly.

[Jimray23]

Thats good to know

Jimmy
1979 kz1000 ltd mkii
     dyna s ignition, dyna 3 ohm coils, solid copper core plugs, full rewire.

[Jimray23]

The morgan website says $102 delivered tu is

Jimmy
1979 kz1000 ltd mkii
     dyna s ignition, dyna 3 ohm coils, solid copper core plugs, full rewire.

[Terry in Australia]

Yep, I had a set of the cheapy 4 guage set up, but found them too fiddly, so upgraded to the Morgan Carb Tune 10 or 15 years ago, and because I've bought and sold over 20 bikes in that period, have found them quite useful, especially for reducing "Clutch Rattle". Cheers, Terry.