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Vintage MX Bike Silencer End Cap

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  • Vintage MX Bike Silencer End Cap

    The silencer of a two stroke MX bike needs to be packed with fibreglass to keep the sound down and the horse power up.
    Back in the early days the silencers were welded shut so making them throw away. But with a little effort we can rebuild them.

    First cut the end off trying to make the cut as straight as possible.

    Ji
    Attached Files
    Grip it and Rip it

  • #2
    If there is any packing still inside remove it.
    Wear a face mask and wet the fibres first then place old packing in a sealed plastic bag.
    This old packing will be dead from oil and carbon.

    Ji
    Attached Files
    Grip it and Rip it

    Comment


    • #3
      I went down to my local ali shop and purchased tubes that were as close to the diameters as possible.

      Ji
      Attached Files
      Grip it and Rip it

      Comment


      • #4
        Cut the tubes to the right length and turn or sand to fit.
        Bevel all edges for ease of fit.

        Ji
        Attached Files
        Grip it and Rip it

        Comment


        • #5
          Cut and shape the seperator plate and fit.

          Ji
          Attached Files
          Grip it and Rip it

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          • #6
            TIG weld up the internal tube.

            Ji
            Attached Files
            Grip it and Rip it

            Comment


            • #7
              TIG weld up the external tube.

              Ji
              Attached Files
              Grip it and Rip it

              Comment


              • #8
                Drill and tap threads in the new end cap to fix to silencer body.

                Ji
                Attached Files
                Grip it and Rip it

                Comment


                • #9
                  Thats some nice work. Must be nice to have a local ali shop as i have to order my alum online...Bob
                  Bob Wright

                  Spool Gun conversion. How To Do It. Below.
                  http://www.millerwelds.com/resources...php?albumid=48

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                  • #10
                    Hi Aametalmaster,
                    Thanks for the kind words.
                    We have three ali shops within 20km.
                    They sell 6061 T6 pretty cheap too.

                    Ji
                    Grip it and Rip it

                    Comment


                    • #11
                      Originally posted by aametalmaster View Post
                      Thats some nice work. Must be nice to have a local ali shop as i have to order my alum online...Bob
                      Hi Bob,

                      Did you ever try Clinton Aluminum? I believe they're in Alliance, I use them all the time for both aluminum and stainless steel. I know for a fact they're in Stark Co. I was going to say I'd have to wait till Mon to pull an invoice but they do have a web site.

                      http://www.clintonaluminum.com/

                      Only about half an hour from you. Probably.

                      Hope this helps
                      Blondie (Owner C & S Automotive)

                      Colt the original point & click interface!

                      Millermatic 35 with spot panel
                      Miller 340A/BP
                      Victor O/A torches
                      Lincoln SP125
                      Too many other tools to list

                      03 Ram 1500
                      78 GS1000
                      82 GL1100 Interstate

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