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motorcycle breather pipe material and bending

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motorcycle breather pipe material and bending

Home › Forums › Beginners questions › motorcycle breather pipe material and bending

  • This topic has 6 replies, 4 voices, and was last updated 6 May 2016 at 09:02 by Keith Matheson.
Viewing 7 posts - 1 through 7 (of 7 total)
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  • 5 May 2016 at 21:21 #8120
    Keith Matheson
    Participant
      @keithmatheson47708
      5 May 2016 at 21:21 #237666
      Keith Matheson
      Participant
        @keithmatheson47708

        Hi

        I am currently repairing a fibreglass tank for my motorcycle. It originally had a right angled pipe at the front to act as a breather. This had long since been torn off and needs replacing as all I have now is a rough hole where it once was. I need to make a tube/pipe that comes out of the hole and then turns 90 degrees. it needs to be about 5mm in diameter. About 10mm coming straight out of tank, then the bend then about another 10mm in length. What material would be easy to bend and suitable for this application.

        thanks in advance Keith MM

        5 May 2016 at 21:27 #237667
        Involute Curve
        Participant
          @involutecurve

          Aluminium bonds well to glass fibre.

          Are you going to line the tank against ethanol?

          Shaun

          5 May 2016 at 21:34 #237669
          Keith Matheson
          Participant
            @keithmatheson47708

            Hi Thanks for guidance. Ref ethanol I have just received a can of sealer from Hitchcocks motorcycles which I trust will work. Had planned to seal the thing this weekend but then realised I had the 'breather pipe' problem to solve before I started- hence the post. Thanks again Keith MM

            5 May 2016 at 21:56 #237673
            stevetee
            Participant
              @stevetee

              Garages use either copper or cupronickel ( kunifer) tubing 3/16 diameter( so close to 5mm that it doubles up) to make up brake pipes. A proper car repairing garage will sell you a small length for next to nothing. Being copper based it's easy to bend and also very easy to anneal. You could roughen up the end with a pair of pliers or similar, so it will bond well to the fibreglass.

              5 May 2016 at 22:50 #237680
              daveb
              Participant
                @daveb17630

                There won't be a lot of support for the tube if you simply poke a hole in the tank and seal it with glass fibre, I used to silver solder a washer to the tube and bed this to the tank. Never had one fall out! Copper should be OK for this.

                Dave

                6 May 2016 at 09:02 #237710
                Keith Matheson
                Participant
                  @keithmatheson47708

                  Thanks Dave b exactly the wise words and guidance I need. I will do this kmm

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