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 Post subject: Bending Pipe
PostPosted: Sun Feb 10, 2013 7:08 am 
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paso grand pooh-bah
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Location: SF Bay Area
model: 750 Sport
year: 1990
Now, before you drag McTool into some depraved rant about Olga, I need to tell you I'm talking about exhaust pipes.

I want to bend up a set of custom exhaust pipes to make some high pipes like the original 750 Sport that ran at Imola. Long megaphones down each side.

Anyone have any experience in bending up header pipe in nice graceful bends? All hints and suggestions welcomed. Been trolling the web, and finding lots of half baked ideas.


Cheers, Phil

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1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
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 Post subject: Re: Bending Pipe
PostPosted: Sun Feb 10, 2013 9:25 am 
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paso grand pooh-bah
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not an expert but if you don`t have a pipe bender all you can do is fill the tube with sand, heat it up red hot and then bend.

G.


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 Post subject: Re: Bending Pipe
PostPosted: Sun Feb 10, 2013 1:10 pm 
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paso grand pooh-bah
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Location: Manchester, England.
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Monsters have a few various designs that could be incorporated into your design

The alternative would be to use the pipe already bent then cut and splice, tack weld up into your own flow angle and if you are not confident in your own welding give it to some one else more able to finish off.

If you are bending your own you will need to also make up a strong jig to bend with and have lots of heat available.

Olga sounds an interesting lady tell us more??? :evil:

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 Post subject: Re: Bending Pipe
PostPosted: Sun Feb 10, 2013 2:22 pm 
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paso grand pooh-bah
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Location: Hilltown,Pennsylvania
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A bender is the way to go but not the only way. Hand bending generally requires a jig, heat and a good pair of gloves and a lot of time and patience

Here is an article on sand bending


http://www.rorty-design.com/content/sand_bending.htm

It would most likely be quicker and cheaper to buy pre bent sections of pipe and weld it into the system you require


You can always make your own bender as some have done.

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 Post subject: Re: Bending Pipe
PostPosted: Sun Feb 10, 2013 6:02 pm 
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paso grand pooh-bah
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Joined: Sun Jul 18, 2004 12:00 am
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Location: southern Germany
model: 750 Paso
year: 1987
(hillbilly style)
http://www.youtube.com/watch?v=mawebpskaWs
http://www.youtube.com/watch?v=v8mMQbEkr8w
Getting the angle right is really difficult specially if the pipe is not bent only in one dimension


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 Post subject: Re: Bending Pipe
PostPosted: Sun Feb 10, 2013 7:39 pm 
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paso grand pooh-bah
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Location: Hilltown,Pennsylvania
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paso750 wrote:
(hillbilly style)
http://www.youtube.com/watch?v=mawebpskaWs
http://www.youtube.com/watch?v=v8mMQbEkr8w
Getting the angle right is really difficult specially if the pipe is not bent only in one dimension



Yoshi knew how to get things done with what you have

Thats a vice and a rosebud tip on an acetylene setup...all you really need

or use prefab pipe http://www.youtube.com/watch?v=n9pHTtyzz_I&NR=1&feature=endscreen

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Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
88 750
90 906
92 907ie


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 Post subject: Re: Bending Pipe
PostPosted: Tue Feb 12, 2013 4:36 am 
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paso grand pooh-bah
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Joined: Sat Sep 03, 2005 12:00 am
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Location: SF Bay Area
model: 750 Sport
year: 1990
Thanks for the inputs guys.
I like the idea of buying prebent tubing, but I am having a hard time finding some 1.5" tubing with a big radius bend.

I love the old style technique of the Yosimura video.

If I can find a bender for cheap, i'll jump on it, and then just resell it when I'm done.

Cheers, Phil

_________________
Duc in the Bay
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.


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 Post subject: Re: Bending Pipe
PostPosted: Tue Feb 12, 2013 12:01 pm 
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paso grand pooh-bah
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Location: Manchester, England.
model: 907 I.E.
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Phil rather than looking for pipe see if you can find another exhaust with the type of curve you require then cut and splice that part - as stated look at some monster exhausts on fleabay or gumtree (if you have that) or similiar It sometimes works out cheaper as I have found to my own cost.

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 Post subject: Re: Bending Pipe
PostPosted: Wed Feb 13, 2013 12:47 am 
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paso grand pooh-bah
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Location: Hilltown,Pennsylvania
model: 906 Paso
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paso750 wrote:
not an expert but if you don`t have a pipe bender all you can do is fill the tube with sand, heat it up red hot and then bend.

G.


The sand needs to be void of moisture or it will go off like a pipe bomb...bake your sand in an oven first for at least 3 hours at 350F

_________________
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
88 750
90 906
92 907ie


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 Post subject: Re: Bending Pipe
PostPosted: Thu Feb 14, 2013 11:14 pm 
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paso grand pooh-bah
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Joined: Sat Sep 03, 2005 12:00 am
Posts: 1294
Location: SF Bay Area
model: 750 Sport
year: 1990
After looking at countless videos, and websites for benders, I came to the realization that buying bent sections is the cheapest way forward. I found a great selection at Summit Racing http://www.summitracing.com
I'm then going to have the welded up pipes ceramic coated.

Thanks for the input. I'll post pictures of the pipe building process on the Sport page.

Cheers, Phil

_________________
Duc in the Bay
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.


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 Post subject: Re: Bending Pipe
PostPosted: Fri Feb 15, 2013 12:35 am 
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paso grand pooh-bah
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Joined: Tue Jul 29, 2008 9:50 pm
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Location: Hilltown,Pennsylvania
model: 906 Paso
year: 1990
:beer: :beer: :thumbup: :thumbup:

_________________
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
88 750
90 906
92 907ie


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 Post subject: Re: Bending Pipe
PostPosted: Sat Feb 16, 2013 1:25 pm 
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paso grand pooh-bah
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Joined: Tue Jul 20, 2010 9:27 am
Posts: 604
Location: Melbourne Australia
model: 907 I.E.
year: 1992
good idea Phil, even if youre not a v-good welder the bench grinder can work miracles, my headers were made from approx 14 different bits and pieces all welded together, and recently been ceramic coated by jet-hot...still yet to try them out, but guaranteed up to 704deg c...which wont be a problem unless the engine is running lean.

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Cheers Claude.

...long live the square framed duc!

'92 907...numero 2046
'92 851...in progress


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