copper muffler pipe question

spillers

New Member
Oct 18, 2008
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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
 

Norman

LORD VADER Moderator
Staff member
Jan 16, 2008
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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
 
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spillers

New Member
Oct 18, 2008
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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
 

Pablo

Master Bike Builder & Forum Sponsor
Dec 28, 2007
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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".
 

spillers

New Member
Oct 18, 2008
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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.
 

tecker

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May 31, 2008
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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
 

Bikeguy Joe

Godfather of Motorized Bicycles
Jan 8, 2008
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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.