Re: Linked Brakes...again

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  • Mike F
    XSive
    • Jul 2002
    • 99
    • Amesbury (next to Stonehenge)

    #1

    Re: Linked Brakes...again

    I took the proportioning valve apart and took a pic of the components. Nothing was stuck, just a bit of sludge in there. Didn't make a difference to the braking - still dives at the front....maybe I'm just comparing it to my wife's Moto Guzzi.
    Mike Farnworth
    XS1100 E & XS1100 Sport Project
  • xjguy
    XSive
    • Aug 2002
    • 93
    • georgia

    #2
    maybe front suspension is too soft-causing dive?

    Comment

    • Mike F
      XSive
      • Jul 2002
      • 99
      • Amesbury (next to Stonehenge)

      #3
      Yes, you might be right though I've got progressive springs in but with the martini fairing.
      Another thought that I had was that the spring has become softer through age...any evidence of springs doing this?
      Mike Farnworth
      XS1100 E & XS1100 Sport Project

      Comment

      • MartyA
        XS-XJ Guru
        • Jul 2002
        • 2148
        • NW PA

        #4
        HI Mike
        Two items come to mind regarding stiffening the forks. The first is of course increasing the viscosity of the oil. Here the manual calls for SAE 10, I put in 15/20 last time. The dive is less alarming now, even with my Vetter.

        The second is a tip I read about somewhere, adding a 1 1/2 inch length of PVC plastic tube on one end of the forks. I have not done this, but I may to try to improve the dive a little next time I change the fork oil.
        Marty in NW PA
        Gone - 1978E - one of the first XS11 made
        Gone - 2007A FJR - the only year of Dark Red Metallic
        This IS my happy face.

        Comment

        • strom
          XS-XJ Guru
          • Jul 2002
          • 1577
          • Slovenia, EU

          #5
          Hmmm... the other day I compared the GPz 600 forks with those of the XS... The kawa forks have an anti-dive unit that worked great on my kawa. The diameter and lenght is the same, but I don't know bout the brake and axle compatibility...

          The principle of this anti-dive unit is, that when u brake, it locks the dive proportionatly to the power applied to the brake.

          Some ppl don't like it, others said that the unit fails after 2000 miles, but I loved it and it worked great... stoppies were just too easy... couldn't help myself and eventually I broke the top-case mounting (the effect of slamming the rear wheel back to the ground).

          I had linked brakes on the guzzi too, but I couldn't really say that it worked... good or bad... dunno... I was usually too scared to notice No fork brace press... the front wheel went wherever it felt like when braking hard. Never a boring moment with that bike... loved it.

          The easiest and cheapest solution would be thicker oil and putting the plastic thingies in there... the anti-dive was just a thaught I was playing with for a time. Maybe on my 2nd bike... when I get one Definetly a guzzi (lemon or T3), but I won't sell the XS for it... definetly not after I saw the lemon described in the other bikes section...

          Good luck!

          LP
          If it doesn't have an engine, it's not a sport, it's only a game.
          (stole that one from I-dont-know-who)

          Comment

          • Mike F
            XSive
            • Jul 2002
            • 99
            • Amesbury (next to Stonehenge)

            #6
            Yes, I've got sae10 oil in at the mo so I'll try something a bit thicker. Thanks for the help.
            Mike Farnworth
            XS1100 E & XS1100 Sport Project

            Comment

            • Mike Hart
              XS-XJ Guru
              • Jul 2002
              • 1025
              • Seattle, Washington

              #7
              Mike, you can preload those springs too as suggested above, with a pvc spacer.
              Mike * Seattle * 82 F'n'XJ1100 *

              Comment

              • MartyA
                XS-XJ Guru
                • Jul 2002
                • 2148
                • NW PA

                #8
                I am working on old memory on this. I recall it was 1 1/2 inches. Maybe there is a more optimum length. Anyone?
                Marty in NW PA
                Gone - 1978E - one of the first XS11 made
                Gone - 2007A FJR - the only year of Dark Red Metallic
                This IS my happy face.

                Comment

                • Mike Hart
                  XS-XJ Guru
                  • Jul 2002
                  • 1025
                  • Seattle, Washington

                  #9
                  On a special or XJ, I'm pretty sure it was 3". On a standard, none.

                  I think Mike F has a standard, but a bit of preload might help anyway, if heavier oil doesn't do the trick.
                  Mike * Seattle * 82 F'n'XJ1100 *

                  Comment

                  • Mike F
                    XSive
                    • Jul 2002
                    • 99
                    • Amesbury (next to Stonehenge)

                    #10
                    I guess that I'll change the oil first as I've tried changing the preload.
                    BTW, I had to get new bushes made up as the old ones were so worn and new ones were unavailable. The old ones were made from 'Tufnell' and I had the new ones made of nylon. Initally, they were a little bit tight and the gap had to be filed down a bit.
                    The bloke who did them informed me afterwards that most of the cost was in the setting up of the machine and it wouldn't have cost a lot more to do more.
                    Why do I always here that after the event!
                    Mike Farnworth
                    XS1100 E & XS1100 Sport Project

                    Comment

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