79 sf,need your advise

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  • motoman
    Master of XSology
    • Aug 2005
    • 8413
    • Grand Junction, Colorado

    #16
    Had to re-read the WORK DONE. The no.1 isn't gonna cut it. Your gonna have to ACTUALLY sync the carbs with a manometer, preferably with one that has mercury in it. That'll likely resolve majority of its running issue.
    81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.

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    • mrtkayak
      XSive
      • Oct 2015
      • 17
      • Woodbridge, VA.

      #17
      Originally posted by motoman
      Had to re-read the WORK DONE. The no.1 isn't gonna cut it. Your gonna have to ACTUALLY sync the carbs with a manometer, preferably with one that has mercury in it. That'll likely resolve majority of its running issue.
      Ill try to order one or make one (DIY).thanks
      79 SF

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      • HalfCentury
        XStremely XSive
        • Oct 2015
        • 408
        • Burlington NC

        #18
        Originally posted by mrtkayak
        Ill try to order one or make one (DIY).thanks


        Here is a DIY differential synch system. The bottles are Isopure protein drink. I used manifold intake boots from an XJ650 parts bike.

        This rig will show absolute zero differential vacuum draw. I believe this is way more accurate than a 4-stick readout. Just my opinion.

        I can tell you that after rebuilding an XJ650 carbs, adjusting valve clearances and synchronizing with the above rig, the bike was a rocket ship that I drove for 4 years. It started in 10 degree weather instantly.
        82 XJ1100 - sold
        96 Honda Magna 750 - Girlfriend's bike
        2000 ZRX1100 - sold
        2003 FJR1300 - Silver rocket

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        • HalfCentury
          XStremely XSive
          • Oct 2015
          • 408
          • Burlington NC

          #19
          An additional item, the bench sync was very far from balanced. One pair was very much unbalanced. Adjustment to balance was easy using the bottles.
          82 XJ1100 - sold
          96 Honda Magna 750 - Girlfriend's bike
          2000 ZRX1100 - sold
          2003 FJR1300 - Silver rocket

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          • mrtkayak
            XSive
            • Oct 2015
            • 17
            • Woodbridge, VA.

            #20
            Thanks man!
            79 SF

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            • Radioguylogs
              XS-XJ Guru
              • Nov 2012
              • 1933
              • Presque Isle, MI

              #21
              Uh-oh

              Originally posted by HalfCentury
              Bureau of ATF will be calling you soon.
              -Mike
              _________
              '79 XS1100SF 20k miles
              '80 XS1100SG 44k miles
              '81 XS1100H Venturer 35k miles
              '79 XS750SF 17k miles
              '85 Honda V65 Magna ~7k miles
              '84 Honda V65 Magna 48k miles (parts bike)
              '86 Yamaha VMAX 9k miles

              Previous: '68 Motoguzzi 600cc + '79 XS750SF 22k miles +'84 Honda V65

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              • Prothec
                XSive Maximus
                • Jul 2007
                • 587
                • Fort Myers, FL

                #22
                Originally posted by Radioguylogs
                Bureau of ATF will be calling you soon.
                Imagine the additional screening you'd get from the TSA
                82J · 81SH · 79SF Fire Damage · 78E · 79F Parts Bike · 04 Buell Blast
                Website/Blog

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