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Cheap alternative to carb sync adapters?

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    #16
    12" of mercury is 12' of water, and yes, they pull that much vacuum. on the one I had with pods (lower vacuum), it was no problem to do, but the other two I ran out of space in my 12' garage.
    Yamaha fz1 2007

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      #17
      If you are using a single U-Tube, connect cylinder 3 to one end and then the other cylinder to the other. There will be no displacement if the two carbs are in sync. You could use a four-way valve from a fish store for carbs 1,2, and 4 so you don't have to shut the engine off each time (or just put a valve on the #3 side while switching carbs.

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        #18
        pricey toy

        Originally posted by bwringer View Post
        Sometime this fall or winter, I'm probably going to try and browbeat some of the Indy-area riders into chipping in on a Morgan Carbtune. I played with one yesterday, and me likey.

        In the meantime, you're welcome to use my mercury sticks if you can make it 45 minutes down the road!
        I synchronized my 81 GS1100G last night with the 'Carbtune Pro' It was a little more expensive than I was hoping, but it works great. The old beast is actually idling and makes smooth power just off idle. I still think the old mercury sticks are better and Motion Pro makes a new version that uses a 'non-mercury' fluid. http://www.motionpro.com/motorcycle/tools/syncpro/
        Unfortunately, they've upped the price. I just missed a brand new old stock nercury version on ebay last month (went for 61!).

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          #19
          Originally posted by themess View Post
          Thanks, Killer.

          Has anyone tried this kind of meter? It is electronic and only compares the readings of two cylinders at a time and shows the difference.



          It costs $75.
          I have had this tool for a couple of years now... it's great... but the adaptors I received with it, as I found out yesterday, MAY not fit the carbs on my 77 GS400. I say MAY because they're damn difficult to turn in by hand. I am going to Dremel a slot in the ends so I can use a screwdriver to turn them. When I do get around to it I'll post the results.

          I was amazed I even found the adapters... I don't need them at all on the Bing's on the BMW.

          It has, for the record, made syncing the carbs on the airhead very easy. Engine is smooth as glass after.

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