Linking front fork air adjustment

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  • LoftCol
    XSive
    • Jul 2025
    • 62
    • UK

    #1

    Linking front fork air adjustment

    Good morning, has anyone ever linked the front forks into a single airline so that when pressurised they are both the same? Thanks
  • Schming
    XS-XJ Guru
    • Jul 2009
    • 2095
    • Pittsburgh,PA

    #2
    XJ's have that feature. The tops of their forks are drilled perpendicular to the tube and O-ringed collars with a rubber tube connecting them balance the air.
    1980 XS1100G "Dolly G" Full Dresser (with a coat of many colors )
    1979 XS1100SF (stock-euro mods planned)
    1984 XV700L Virago (to be hot-modded)
    1983 XJ750MK Midnight Maxim (semi-restored DD)
    1977 XS650D ( patiently awaiting resto)

    Sometimes it takes a whole tank of gas before you can think straight.

    Comment

    • DiverRay
      Moderator
      • Nov 2004
      • 7807
      • Star, IDAHO

      #3
      Yes, there WAS a kit made to do that. You could probably go to a local hydraulic shop and have them build something for you. Parts should not be that much money as most of it is standard air fittings. The only metric may be the threads in the forks for the valves.
      Ray Matteis
      KE6NHG
      XS1100 E '78 (winter project)
      XS1100 SF Bob Jones worked on it!

      Comment

      • DEEBS11
        XS-XJ Guru
        • Feb 2023
        • 2001
        • Connecticut

        #4
        https://www.ebay.com/itm/23583766854...Bk9SR6C_pbbdZw

        Comment

        • Mathh
          XSive Maximus
          • Nov 2006
          • 695
          • Beek, Netherlands

          #5
          Just remember: if one side leaks, the other side will leak with it .
          XS1100 3X0 '82 restomod, 2H9 '78 chain drive racer, 3H3 '79 customized.
          MV Agusta Brutale 910R '06.
          Triumph 1200 Speed Trophy '91, Triumph 1200 '93.
          Z1 '73 restomod, Z1A '74 yellow/green, KZ900 A4 '76 green.
          Yamaha MT-09 Tracer '15 grey.
          Kawasaki Z1300 DFI '84 modified, red.

          Comment

          • bikerphil
            Master of XSology
            • Jan 2008
            • 8879
            • South Flori-DUH

            #6
            If you were to stiffen up the springs a bit, you can eliminate the air feature altogether and never have to worry about it again.
            2H7 (79) owned since '89
            3H3 owned since '06

            07 Triumph Tiger 1050 (night rider)

            "If it ain't broke, modify it"

            Comment

            • jetmechmarty
              Master of XSology
              • Nov 2003
              • 8059
              • Coldwater, Mississippi

              #7
              Originally posted by bikerphil
              If you were to stiffen up the springs a bit, you can eliminate the air feature altogether and never have to worry about it again.
              I don’t see any value in the air forks. I’d love to have standard caps on top of the forks, but it seems we’ve been through that.

              What I do is elevate the oil in the forks, which has the same effect as adding air. The resistance is highest at the bottom of travel noticeably improving brake dive. I believe my number is 130 mm. That’s the oil level measured from the top of the tube with the fork collapsed and the spring removed. My reference was the Race-Tech Tuning Guide.
              Marty (in Mississippi)
              XS1100SG
              XS650SK
              XS650SH
              XS650G
              XS6502F
              XS650E

              Comment

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