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Fork flex - to say the least!

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  • Fork flex - to say the least!

    Hi guys, I was eyballing Beastly last night as I gather my thoughts for upcoming winter projects. I remembered that someone here said if you put the front wheen between your legs, hold the bars and twist that you'd see flex in the forks. Well let me tell you, there's flex alright! It takes hardly any force at all to get the front edge of the tire to move a half inch in one direction or the other and with a little muscle, it' looks to me like you could get almost an inch! Granted, I'm eyeballing this so my figures might be off somewhat, but these forks clearly flex very easily. So besides my progressive springs, the T Kat brace will be ordered Tuesday. I'll try to get some way to measure the actual flex/force before and after the brace to try and help with the controversy over whether or not the brace does much if anything.
    '79 XS11 Special, fork gaiters, Uni pods, 45 pilots, 140 mains, ditched the octy, solo seat, T kat fork brace

    Purrs like a kitten, runs like a scalded cat

  • #2
    That does seem like alot of movement, are you certain it was all in your forks? Have you changed your front wheel bearings recently? Now I am pondering checking my own.
    Life is what happens while your planning everything else!

    When your work speaks for itself, don't interrupt.

    81 XS1100 Special - Humpty Dumpty
    80 XS1100 Special - Project Resurrection


    Previously owned
    93 GSX600F
    80 XS1100 Special - Ruby
    81 XS1100 Special
    81 CB750 C
    80 CB750 C
    78 XS750

    Comment


    • #3
      You might want to check all the fasteners for tightness...
      Fast, Cheap, Reliable... Pick any two

      '78E original owner - resto project
      '78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
      '82 XJ rebuild project
      '80SG restified, red SOLD
      '79F parts...
      '81H more parts...

      Other current bikes:
      '93 XL1200 Anniversary Sportster 85RWHP
      '86 XL883/1200 Chopper
      '82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
      Cage: '13 Mustang GT/CS with a few 'custom' touches
      Yep, can't leave nuthin' alone...

      Comment


      • #4
        I didnt realize there was any controversy over a fork brace? Must come from the people who dont have one.
        Trapped in time. Surrounded by evil. Low on gas.

        1980 XS1100G 1179 kit, Tkat brace, progressive springs & shocks, jardine spaghetti, Mikes coils, Geezer's rectifier

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        • #5
          Originally posted by Elevener View Post
          I didnt realize there was any controversy over a fork brace? Must come from the people who dont have one.
          Hi Elevener,
          the controversy is between those who can't afford one and those who are too cheap to buy one.
          But they don't work magic. If your fork is in good shape, not worn anywhere and all it's fasteners are torqued up properly, a brace will improve it's function.
          If it ain't, not so much.
          Fred Hill, S'toon
          XS11SG with Spirit of America sidecar
          "The Flying Pumpkin"

          Comment


          • #6
            I have a fork brace and emulators. With everything set to tight (too little sag) my front end doesn't soak up the bumps. In that condition, I can see the forks flex all over the place. I can look down and actually see it as I ride. The visual goes away with the forks set up properly.

            Marty (in Germany)
            Marty (in Mississippi)
            XS1100SG
            XS650SK
            XS650SH
            XS650G
            XS6502F
            XS650E

            Comment


            • #7
              As far as bearing and tightness of the bolts, I would think the bearings are OK since the bike doesn't even have 8k miles on it and when the front wheel is off the ground everything sounds and feels right as it rotates. Bolts are definitely tight. It will be interesting to do my before and after tests.
              '79 XS11 Special, fork gaiters, Uni pods, 45 pilots, 140 mains, ditched the octy, solo seat, T kat fork brace

              Purrs like a kitten, runs like a scalded cat

              Comment


              • #8
                Just cause it has low miles doesn't mean the bearings are good. Most likely they are still 30 year old bearings and that greasy gets dry and thick and chunkie.
                Nathan
                KD9ARL

                μολὼν λαβέ

                1978 XS1100E
                K&N Filter
                #45 pilot Jet, #137.5 Main Jet
                OEM Exhaust
                ATK Fork Brace
                LED Dash lights
                Ammeter, Oil Pressure, Oil Temp, and Volt Meters

                Green Monster Coils
                SS Brake Lines
                Vision 550 Auto Tensioner

                In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

                Theodore Roosevelt

                Comment


                • #9
                  ^^^^ True dat!^^^ I will do a closer exam as I spruce Beastly up this fall and winter.
                  '79 XS11 Special, fork gaiters, Uni pods, 45 pilots, 140 mains, ditched the octy, solo seat, T kat fork brace

                  Purrs like a kitten, runs like a scalded cat

                  Comment


                  • #10
                    the front 2 and right rear wheel bearings are super cheap! Got the three for under $10, as long as the outer seals are good, even with the seals I think people have said.the kit for that is under $30.
                    Nathan
                    KD9ARL

                    μολὼν λαβέ

                    1978 XS1100E
                    K&N Filter
                    #45 pilot Jet, #137.5 Main Jet
                    OEM Exhaust
                    ATK Fork Brace
                    LED Dash lights
                    Ammeter, Oil Pressure, Oil Temp, and Volt Meters

                    Green Monster Coils
                    SS Brake Lines
                    Vision 550 Auto Tensioner

                    In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

                    Theodore Roosevelt

                    Comment


                    • #11
                      Good to know. Is there any special thing to look for other than the obvious such as a visual check and a check for free play that can be felt by hand?
                      '79 XS11 Special, fork gaiters, Uni pods, 45 pilots, 140 mains, ditched the octy, solo seat, T kat fork brace

                      Purrs like a kitten, runs like a scalded cat

                      Comment


                      • #12
                        Stiffness, notchiness, rust. Most likely they are going to be sealed bearing so you won't be able to see in them anyways unless you remove the seal and then you might as wee replace them. The front on mine I couldn't even remove without hitting on the inner race and i wouldn't reuse it then.
                        Nathan
                        KD9ARL

                        μολὼν λαβέ

                        1978 XS1100E
                        K&N Filter
                        #45 pilot Jet, #137.5 Main Jet
                        OEM Exhaust
                        ATK Fork Brace
                        LED Dash lights
                        Ammeter, Oil Pressure, Oil Temp, and Volt Meters

                        Green Monster Coils
                        SS Brake Lines
                        Vision 550 Auto Tensioner

                        In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

                        Theodore Roosevelt

                        Comment


                        • #13
                          OK thank you.
                          '79 XS11 Special, fork gaiters, Uni pods, 45 pilots, 140 mains, ditched the octy, solo seat, T kat fork brace

                          Purrs like a kitten, runs like a scalded cat

                          Comment


                          • #14
                            Bearings. Where do you source them?
                            Marty (in Mississippi)
                            XS1100SG
                            XS650SK
                            XS650SH
                            XS650G
                            XS6502F
                            XS650E

                            Comment


                            • #15
                              I went to my local bearing supply and gave the counter person these numbers

                              Frount B6303 2RS

                              Rear B6304 2RS this is not the expensive on.
                              They had these in stock so no waiting.
                              Make sure they are double sealed. I think that is what the 2RS means.

                              As I inderstand the other rear bearing will last 75K. and can be greased in the bike.

                              Wheel bearings especially front are a safety concern. If you are unsure of their age; I would replace them. Will also rule them out when you trooble shoot your frount end.

                              HTH.
                              Rick
                              XS1100F TKAT fork brace Stock suspension. Vetter Fairing. Pingel Petcocks. Geezer voltage regulator
                              http://s910.photobucket.com/albums/a...t=DSCF3026.jpg
                              650SF
                              http://s910.photobucket.com/albums/a...t=DSCF2647.jpg
                              XS1100SG Project bike
                              http://s910.photobucket.com/albums/a...t=DSCF3034.jpg

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