re-syncing carbs question

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  • crapwacker
    • Jan 2026

    #1

    re-syncing carbs question

    When I did this last year, I did not plug my petcock vac line. The bike runs well, but not perfect. I recently received my 'good' sync gauge, a carb tune, as I quickly learned how much of a PITA the MotionPro POS one is to use. I'm wondering in advance as to how far off my air-fuel setting may be off
  • Guest

    #2
    WAY off.

    Comment

    • TheCafeKid

      #3
      I finally got a set of good REAL Mercury sticks.. If ya want, bring it down sometime, and we can sync em up. I can do the VMs with my eyes closed...Still trying to master the CV carbs though..

      Comment

      • crapwacker

        #4
        Originally posted by TheCafeKid
        I finally got a set of good REAL Mercury sticks.. If ya want, bring it down sometime, and we can sync em up. I can do the VMs with my eyes closed...Still trying to master the CV carbs though..
        That's awesome! After a long, unsuccessful quest for them I went ahead and ordered the Carbtune

        Comment

        • Guest

          #5
          Originally posted by crapwacker
          That's awesome! After a long, unsuccessful quest for them I went ahead and ordered the Carbtune
          So now TCK will be coming to your house!

          Comment

          • Steve
            GS Whisperer
            • Jun 2005
            • 35924
            • southwest oHIo

            #6
            Originally posted by TheCafeKid
            I can do the VMs with my eyes closed...Still trying to master the CV carbs though..
            It's a bit of a trade-off.

            With the VMs, you have four adjustments to make.
            With the CVs, you only have three, but that center one's a bugger.

            .
            sigpic
            mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
            hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
            #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
            #2 son: 1980 GS1000G
            Family Portrait
            Siblings and Spouses
            Mom's first ride
            Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
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            Comment

            • Steve
              GS Whisperer
              • Jun 2005
              • 35924
              • southwest oHIo

              #7
              Originally posted by crapwacker
              ... I quickly learned how much of a PITA the MotionPro POS one is to use.
              Which model do you have? I have used two of their three models with no operational problems.

              The only problem I had was with the construction of their model that used mercury. The lid over the reservoir would open FAR too easily.

              .
              sigpic
              mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
              hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
              #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
              #2 son: 1980 GS1000G
              Family Portrait
              Siblings and Spouses
              Mom's first ride
              Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
              (Click on my username in the upper-left corner for e-mail info.)

              Comment

              • crapwacker

                #8
                Originally posted by Steve
                Which model do you have? I have used two of their three models with no operational problems.

                The only problem I had was with the construction of their model that used mercury. The lid over the reservoir would open FAR too easily.

                .
                It was the current offering from MotionPro. The fluid develops bubbles in it and the process of unhooking the unit, turning the calibration screws out and shaking the unit like a thermometer too remove them, then reconnection it , recalibrating it is just absurd!

                Comment

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