Unable to separate fork!

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  • oblique
    • Jan 2026

    #1

    Unable to separate fork!

    I cannot for the life of me get one of my forks apart!

    Took off forks cap, removed springs, drained oil, removed dust cap, removed circlip, removed fork bolt, removed damper rod.

    Tried repeatedly to separate leg from stanchion to no avail. Even tried standing on the axle with both feet as I pulled up - the seal wont budge. I noticed that the oil seal is installed upside down but would this cause the seizure?

    Im out of options.
  • oblique

    #2
    Its an '80 750L.

    Comment

    • chuck hahn
      Forum LongTimer
      Past Site Supporter
      • May 2009
      • 25918
      • Norman, Oklahoma

      #3
      wrap it in rags or use a piece of wood on each side and lock it in a vice very tightly. Grab the lower and jack it like you would a slide hammer..it will come apart. be sure to remove the retainer clip at the top of the seal....sits in a groove to retain the seals and spacers.
      MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
      1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

      NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


      I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

      Comment

      • hillsy
        Forum Sage
        • May 2008
        • 1469
        • Brisbane, Queensland, Australia

        #4
        Originally posted by chuck hahn
        wrap it in rags or use a piece of wood on each side and lock it in a vice very tightly. Grab the lower and jack it like you would a slide hammer..it will come apart. be sure to remove the retainer clip at the top of the seal....sits in a groove to retain the seals and spacers.
        +1

        If you have a vice with soft jaws (aluminium) you can lock the caliper mounts in the vice and slide the stanchion back and forth. Sometimes they are tough, but it will come out.
        Current:
        Z1300A5 Locomotive (swapped my Intruder for it), GS450 Cafe Project (might never finish it....), XT500 Commuter (I know - it's a Yamaha :eek:)

        Past:
        VL1500 Intruder (swapped for Z1300), ZX9R Streetfighter (lets face it - too fast....), 1984 GSX750EF, 1984 GSX1100EF (AKA GS1150)
        And a bunch of other crap Yamahas....

        Comment

        • oblique

          #5
          The problem is that Im working inside my apartment and the vice is fairly light and mounted to a rather thin table.

          Is there any way to jack these apart? I tried using a bottle jack to jack the lip of the stanchion but the leg just kept sliding against the wood I had in the vice.

          Also after all this sliding back and forth I can feel slight scraping when I top out the fork leg.

          Comment

          • chuck hahn
            Forum LongTimer
            Past Site Supporter
            • May 2009
            • 25918
            • Norman, Oklahoma

            #6
            What about the retainer clip and washer thats right on top of the seals??? You never mentioned that yet. IF you have everything out ( and you did mention the bolt from the bottom was out ) then it shouldnt take Herculean force..just a few good quick slaps.
            MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
            1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

            NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


            I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

            Comment

            • tkent02
              Forum LongTimer
              Past Site Supporter
              • Jan 2006
              • 35571
              • Near South Park

              #7
              Don't need the vice, just hold one end in one hand, the other in the other hand, slam the two pieces apart. Asuming you have the retainer out as Chuck says.
              http://img.photobucket.com/albums/v5...tatesMap-1.jpg

              Life is too short to ride an L.

              Comment

              • oblique

                #8
                The retainers been out since day 1. I've been slamming these 2 against each other repeatedly and the fork seal has not moved a millimeter above the retainer groove.

                The other fork was a piece of cake and came out like any other I've done.

                Comment

                • hillsy
                  Forum Sage
                  • May 2008
                  • 1469
                  • Brisbane, Queensland, Australia

                  #9
                  There's nothing holding it in apart from the seal. You probably need to get the lower into a solid vice so you can get the right amount of force into sliding the stanchion.

                  Be patient.
                  Current:
                  Z1300A5 Locomotive (swapped my Intruder for it), GS450 Cafe Project (might never finish it....), XT500 Commuter (I know - it's a Yamaha :eek:)

                  Past:
                  VL1500 Intruder (swapped for Z1300), ZX9R Streetfighter (lets face it - too fast....), 1984 GSX750EF, 1984 GSX1100EF (AKA GS1150)
                  And a bunch of other crap Yamahas....

                  Comment

                  • SqDancerLynn1

                    #10
                    lots of air pressure !!!!

                    Comment

                    • chuck hahn
                      Forum LongTimer
                      Past Site Supporter
                      • May 2009
                      • 25918
                      • Norman, Oklahoma

                      #11
                      OK then...,the rubber has sealed itself to the lower and its stuck.heat it up with a torch or above the stove burner till its pretty warm to the touch but not so hot it starts to discolor the metal...should pop right off. The heat will soften the seals rubber and release it.
                      MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                      1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                      NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                      I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                      Comment

                      • Guest

                        #12
                        Burn the seal out with a propane torch and it will come right apart.

                        Comment

                        • RichDesmond
                          Forum Sage
                          Past Site Supporter
                          • Jul 2011
                          • 2757
                          • NoVa

                          #13
                          On really stubborn ones I put the tube back in the triple clamp and then do the side hammer bit with the lower. You get a lot more force that way compared to just having them in your hands.
                          '20 Ducati Multistrada 1260S, '93 Ducati 750SS, '01 SV650S, '07 DL650, '01 DR-Z400S, '80 GS1000S, '85 RZ350

                          Comment

                          • oblique

                            #14
                            I've the triples off the bike but I will give it another shot with some heat and my vice.

                            Comment

                            • oblique

                              #15
                              It's done!

                              The recipe: plenty of heat, triple tree stopper, a vice, and some brutal force.



                              Comment

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