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    Rear shock absorber posts stripped

    I have on one side 2 rear shock absorber posts stripped.
    The threads have not been great since i had this bike but I wanted to see once and for all
    if they were ok . They are now stripped and i cannot get them back tapping and dieing.

    GS550E 1980

    They are both m10 * 1.25 threads and the main post is 12mm dia.
    The m10 * 1.25 thread is now stripped on both.

    I have run a tap in the bolts and a die on the threads and they wont tighten.

    What on earth can I do now ?
    I am not a welder.
    I have restored many bikes and this is a first for me - and all this on my favorite bike.
    Last edited by ukjules; 05-12-2017, 11:52 AM.
    UKJULES
    ---------------------------------
    Owner of following bikes:
    1980 Suzuki GS550ET
    1977 Yamaha RD 250D
    1982 Kawasaki GPZ 750 R1
    1980 Suzuki GSX 250E

    #2
    Originally posted by ukjules View Post
    I have on one side 2 rear shock absorber posts stripped.
    The threads have not been reat since i had this bike but I wanted to see once and for all
    if they were ok . They are now stripped and i cannot get them back tapping and dieing.

    GS550E 1980

    They are both m10 * 1.25 threads and the main post is 12mm dia.
    The m10 * 1.25 thread is now stripped on both.

    I have run a tap in the bolts and a die on the threads and they wont tighten.

    What on earth can I do now ?
    I am not a welder.
    I have restored many bikes and this is a first for me - and all this on my favorite bike.
    Same thing happened to me on my top posts. I just downsized them with a die. Been like that for years now.
    sigpicMrBill Been a GSR member on and off since April 2002
    1980 GS 750E Bought new in Feb of 1980
    2015 CAN AM RTS


    Stuff I've done to my bike 1100E front end with new Sonic springs, 1100E swing arm conversion with new Progressive shocks installed, 530 sprockets/chain conversion, new SS brake lines, new brake pads. New SS fasteners through out. Rebuilt carbs, new EBC clutch springs and horn installed. New paint. Motor runs strong.

    Comment


      #3
      so go to a m9 * whatever.
      What about the nut ? did you find one suitabke ?
      UKJULES
      ---------------------------------
      Owner of following bikes:
      1980 Suzuki GS550ET
      1977 Yamaha RD 250D
      1982 Kawasaki GPZ 750 R1
      1980 Suzuki GSX 250E

      Comment


        #4
        Some good info in this thread.
        2@ \'78 GS1000

        Comment


          #5
          ok so i need to find out if there are domed m9 nuts ?

          Has anyone who has done this found any suitable nuts ?
          also the m9 die ?

          As my thread is m10*1.25 the next one down is m9 - one i have never heard of ?
          UKJULES
          ---------------------------------
          Owner of following bikes:
          1980 Suzuki GS550ET
          1977 Yamaha RD 250D
          1982 Kawasaki GPZ 750 R1
          1980 Suzuki GSX 250E

          Comment


            #6
            Originally posted by ukjules View Post
            so go to a m9 * whatever.
            What about the nut ? did you find one suitabke ?
            I just used a regular ole nut.
            sigpicMrBill Been a GSR member on and off since April 2002
            1980 GS 750E Bought new in Feb of 1980
            2015 CAN AM RTS


            Stuff I've done to my bike 1100E front end with new Sonic springs, 1100E swing arm conversion with new Progressive shocks installed, 530 sprockets/chain conversion, new SS brake lines, new brake pads. New SS fasteners through out. Rebuilt carbs, new EBC clutch springs and horn installed. New paint. Motor runs strong.

            Comment


              #7
              Originally posted by steve murdoch View Post
              Pretty much what I did.
              sigpicMrBill Been a GSR member on and off since April 2002
              1980 GS 750E Bought new in Feb of 1980
              2015 CAN AM RTS


              Stuff I've done to my bike 1100E front end with new Sonic springs, 1100E swing arm conversion with new Progressive shocks installed, 530 sprockets/chain conversion, new SS brake lines, new brake pads. New SS fasteners through out. Rebuilt carbs, new EBC clutch springs and horn installed. New paint. Motor runs strong.

              Comment


                #8
                Damned annoying this as was the previous owners ham fisted mechanics years ago's fault.

                So original thread was : m10 * 1.25

                I have found dies for m9 * 1 or 1.25.
                I will first find a nut that looks ok'ish, check the thread then get the die.

                Ill take a pic of before and after and update - when i get to work.
                thanks for info and letting me know others have sorted this !
                Last edited by ukjules; 05-12-2017, 12:52 PM.
                UKJULES
                ---------------------------------
                Owner of following bikes:
                1980 Suzuki GS550ET
                1977 Yamaha RD 250D
                1982 Kawasaki GPZ 750 R1
                1980 Suzuki GSX 250E

                Comment


                  #9
                  Q) As i am going from m10 to m9, any advice on doing so ?
                  Do i file down the original thread area a bit ? or just thread directly over the old thread ?
                  UKJULES
                  ---------------------------------
                  Owner of following bikes:
                  1980 Suzuki GS550ET
                  1977 Yamaha RD 250D
                  1982 Kawasaki GPZ 750 R1
                  1980 Suzuki GSX 250E

                  Comment


                    #10
                    I'd think if you used a m9 x 1.25 die, you could just go over the old threads.
                    -1980 GS1100 LT
                    -1975 Honda cb750K
                    -1972 Honda cl175
                    - Currently presiding over a 1970 T500

                    Comment


                      #11
                      i have the same problem on one of my bikes,
                      thread was repaired before and was M6.
                      I will not go smaller so i will remove the studs
                      and weld in new ss ones.

                      Like these :

                      s-l1600.jpg

                      I am NOT affiliated to the seller in any way but here's the link


                      If this stud does not fit i think he will do a custom job for the GS
                      Last edited by Rijko; 05-12-2017, 02:13 PM.
                      Rijk

                      Top 10 Newbie Mistakes thread

                      CV Carb rebuild tutorial
                      VM Carb rebuild tutorial
                      Bikecliff's website
                      The Stator Papers

                      "The thing about freedom - it's never free"

                      Comment


                        #12
                        I have a M9*1.25 die ordered from.ebay.
                        I have 2 M9*1.25 nuts ordered from a citrean club.

                        I think bicycle front axle nuts are M9* 1.0 , will
                        check but they are domed too.

                        I know a machine works that could make the exact same
                        posts. It must be simple to lathe and thread these. I'd have to find a welder to attach it mind.
                        This is the last resort but hell these old bikes need some care don't they.
                        Of all my bikes my GS is the one I have not done a nut and bolt
                        mechanical restore on so I am.bound to find these issues.
                        Last edited by ukjules; 05-12-2017, 03:12 PM.
                        UKJULES
                        ---------------------------------
                        Owner of following bikes:
                        1980 Suzuki GS550ET
                        1977 Yamaha RD 250D
                        1982 Kawasaki GPZ 750 R1
                        1980 Suzuki GSX 250E

                        Comment


                          #13
                          You learn something everyday. I deleted my post. 👍
                          My Motorcycles:
                          22 Kawasaki Z900 RS (Candy Tone Blue)
                          22 BMW K1600GT (Probably been to a town near you)
                          82 1100e Drag Bike (needs race engine)
                          81 1100e Street Bike (with race engine)
                          79 1000e (all original)
                          82 850g (all original)
                          80 KZ 650F (needs restored)

                          Comment


                            #14
                            Update on the issue:

                            With some washer swapping and changing I managed to use
                            the very last bits of thread and now the rear shocks are secure
                            and with care I think can be taken off at will.

                            Cheers for advice.
                            At least now I have the tooling and nut form the one size down
                            method re thread. And as you say as original was 10*1.25
                            9*1.25 would go straight over.

                            @rijko , I'd be very interested how to get on with your fix ?
                            Post here how you sorted it when you do ?
                            UKJULES
                            ---------------------------------
                            Owner of following bikes:
                            1980 Suzuki GS550ET
                            1977 Yamaha RD 250D
                            1982 Kawasaki GPZ 750 R1
                            1980 Suzuki GSX 250E

                            Comment


                              #15
                              Originally posted by ukjules View Post
                              @rijko , I'd be very interested how to get on with your fix ?
                              Post here how you sorted it when you do ?
                              will do and post results !
                              Rijk

                              Top 10 Newbie Mistakes thread

                              CV Carb rebuild tutorial
                              VM Carb rebuild tutorial
                              Bikecliff's website
                              The Stator Papers

                              "The thing about freedom - it's never free"

                              Comment

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