copper muffler pipe question

Discussion in 'Motorized Bicycle General Discussion' started by spillers, Nov 8, 2008.

  1. spillers

    spillers New Member

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    Hello,
    Im new here.
    I recently purchased a new muffler for my motorized bike and it didnt fit.
    I will have to make my own manifold pipe. Ive noticed a lot of people use copper pipe. My question is this: What are you soldering it with? Plumbers solder? Brazing? What? Id rather use low temp plumbers solder but want to make sure it will hold up and the exhaust gas temp wont soften/melt it, otherwise, I'll braze it. What do you all do?

    Thanks
    Ron
     
  2. Norman

    Norman LORD VADER Moderator
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    silver solder might hold, best bet is to braze it or weld it. the pipe can reach a temp of about 1200 F solder melts at about 400F To bad your not here I was going to start on making a pipe today from scratch it will have a muffler can on the end of the pipe and fit under the bikes cranks. I have one already made and it seems to work good.I can 't post any pictures the old snake took the camera to MO. to see my grand baby.
    Norman
     
    #2 Norman, Nov 8, 2008
    Last edited: Nov 8, 2008
  3. jasonh

    jasonh New Member

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    hmmm, bummer. I was wondering the same thing. Boy I wish I had a welder.
     
  4. spillers

    spillers New Member

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    Okay, thanks, that's what I figured.
    I'm gonna braze it. I just wanted to see what you all did, cause 400 degrees solder seemed way too low. I just wanted to check before I went to town on it.
    Good luck with your exhaust.

    Spillers
     
  5. donuts31

    donuts31 New Member

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    Stupid question, what is brazing?
     
  6. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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  7. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    Ron - Jim and mine are "press" fit, then we slip some silicone sleeving over the joints with two retention springs and the tubing it holds up well and is still adjustable. OTOH brazing will hold up well and be more "permanent".
     
  8. spillers

    spillers New Member

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    interesting idea with the sleeves.
    I welded/brazed/silver soldered my contraption up last weekend. Looks rough. works great! Basically, braze tacked it, ran out of oxygen, used silver solder until the mapp ran out, and then mig welded the rest Even tried to mig weld metal to copper. Didnt work too well, go figure, but the grapes are beautiful. And the engine runs wonderful.
     
  9. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    I just made an extension using aluminum tubing and JB Weld. (after the muffler).
     
  10. jasonh

    jasonh New Member

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    I'm currently using that muffler repair epoxy junk. Just have to bust it all off and redo it every once in a while :)
     
  11. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    I have used that stuff as well. This has interesting possibilities: Magic silicone "tape"
     
  12. tecker

    tecker New Member

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    whats the purpose of useing copper for heat exchange or what I watched occ the other day and they were putting pipes lined with ceramic they would cool to touch in 30 seconds that would be great for one of are bikes
     
  13. jasonh

    jasonh New Member

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    Ceramic coating for headers and pipes are great. it's just expensive as all getout :)
     
  14. jasonh

    jasonh New Member

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    and Pablo that stuff looks cool. I just worry it would melt near the head since it's >500 degrees
     
  15. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    I just rode the bike with the JB Weld and it holds up fine where the extension comes out of the bottom of the muffler.

    Copper would be a lot easier to bend than aluminum, but I think it's more expensive.
     

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