How do I prevent wrinked exhaust pipes when bending tubes without going to the high expense of an expensive pipe bender :?:
http://www.workingatamc.london/pipe_bending.html
http://www.workingatamc.london/pipe_bending.html
EXhaust pipe bending
- Thread starter Bernhard
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- Jun 30, 2012
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If you are making a 2 into 1 pipe, I usually go to a company which bends tube and buy some bends, then weld them together. The problem with doing it that way is that it is impossible to remove the welding flash from inside the joins. However my pipe works very well.
I had a problem finding down pipes for a G15, so I got some scruffy shop-soiled early commando pipes and bent them myself. I bought a garage door closing spring the same diameter as the inside of the pipes, made a handle to pull the spring out with, inserted it in the pipe and heated it up with a gas torch then bent it bit by bit in a vice, checking in between by refitting them to the bike and then rebending where necessary, it turned out very well with no creases or kinks. I then had the pipes re-chromed. Make sure your pulling handle is sturdy as it takes a bit of force and some twisting to get the spring out once the pipe is bent.
The new front pipes did not run parallel to the lower frame rail, made it look like someone had done a bodge.
I used sand and wooden plugs to bend the not quite right front pipes.
Made of thickish stainless, and quite short, they took some additional heat to get them to move at all. And a good mate to add heft.
I made a one off jig to make sure I got both pipes the same.
I used sand and wooden plugs to bend the not quite right front pipes.
Made of thickish stainless, and quite short, they took some additional heat to get them to move at all. And a good mate to add heft.
I made a one off jig to make sure I got both pipes the same.
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