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 Post subject: Expansion chambers plans / drgs
PostPosted: Wed Jun 13, 2018 7:00 pm 
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Joined: Fri Mar 10, 2006 5:37 pm
Posts: 449
Location: Bristol, UK
Evening all.

I’m looking to make my own expansion chambers. I have access to material, a laser cutter and welding equipment.....and I’m up for a challenge.

My question is does anybody have details / plans to enable me to cut the pieces, form and weld?

I guess I’m looking to replicate the lomas pipes (side by side).

It won’t be easy, but I want to take it on as a bit of a project .

Thanks


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 Post subject: Re: Expansion chambers plans / drgs
PostPosted: Thu Jun 14, 2018 1:25 am 
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Joined: Thu Apr 06, 2006 12:18 am
Posts: 56
Location: sacramento, ca
The Yamaha TSI specs are posted on this site. They include pipe specs.
Quite an ambitious project - I wish you success.
Please keep us posted on your progress.


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 Post subject: Re: Expansion chambers plans / drgs
PostPosted: Thu Jun 14, 2018 1:27 am 
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Joined: Thu Apr 06, 2006 12:18 am
Posts: 56
Location: sacramento, ca
Here’s the link
http://www.rzrd500.com/500tsi/


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 Post subject: Re: Expansion chambers plans / drgs
PostPosted: Thu Jun 14, 2018 1:31 am 
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Joined: Thu Apr 06, 2006 12:18 am
Posts: 56
Location: sacramento, ca
Others please chime in - I suspect that those pipe specs would work best if you did the rest of the TSI mods. And from what I can recall the mods result in not the most suitable streetbike?
Others please comment as I have no personal experience with doing the full TSI mods.


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 Post subject: Re: Expansion chambers plans / drgs
PostPosted: Thu Jun 14, 2018 2:37 am 
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Joined: Fri Mar 10, 2006 5:37 pm
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Location: Bristol, UK
Thanks I saw that before.

I guess I was hoping (being lazy) for the “net” shape sizes of all the various cones to get the right lengths and bend angles etc...

Thanks


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 Post subject: Re: Expansion chambers plans / drgs
PostPosted: Thu Jun 14, 2018 11:17 am 
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Joined: Sat Oct 30, 2010 9:46 pm
Posts: 586
Location: ontario canada
I think MK had a good post on pipe building techniques if I could only find it!

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 Post subject: Re: Expansion chambers plans / drgs
PostPosted: Thu Jun 14, 2018 2:55 pm 
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Joined: Thu Mar 09, 2006 12:54 pm
Posts: 243
Location: Germany
Can be found on rd350.gmxhome.de or directly:
http://l3s9113.zeus09.de/RD350/Auspuffb ... glisch.pdf

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 Post subject: Re: Expansion chambers plans / drgs
PostPosted: Thu Jun 14, 2018 3:00 pm 
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Joined: Fri Mar 10, 2006 5:37 pm
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Location: Bristol, UK
That’s an excellent bit of info. Thanks 🙏


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 Post subject: Re: Expansion chambers plans / drgs
PostPosted: Fri Jun 15, 2018 3:01 am 
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Posts: 56
smokamoto wrote:
Others please chime in - I suspect that those pipe specs would work best if you did the rest of the TSI mods. And from what I can recall the mods result in not the most suitable streetbike?
Others please comment as I have no personal experience with doing the full TSI mods.

I went to ask Bassani in Aneheim California to get TSI Expansion Chambers made , was told need 25 sets Minimum order (steel pipes & aluminum silencers ) at $ 1000.00 each set , ( keep 5 sets for myself ) . couldn't find any one else who wanted a set after going to bike nights all over in California .......


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 Post subject: Re: Expansion chambers plans / drgs
PostPosted: Mon Jun 18, 2018 10:10 am 
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Location: Pa
My buddy would be in for a set.


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 Post subject: Re: Expansion chambers plans / drgs
PostPosted: Wed Jun 20, 2018 3:40 am 
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Mike Cichetti wrote:
My buddy would be in for a set.

well only need 24 more people ........


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 Post subject: Re: Expansion chambers plans / drgs
PostPosted: Wed Jun 20, 2018 8:53 am 
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Joined: Thu May 24, 2018 5:22 pm
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stock or gp style?
assuming they save a bunch of weight, etc, yeah I'm in.


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 Post subject: Re: Expansion chambers plans / drgs
PostPosted: Thu Jun 21, 2018 8:53 pm 
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Location: Maidstone, Ontario
This sounds interesting!

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 Post subject: Re: Expansion chambers plans / drgs
PostPosted: Fri Jun 22, 2018 6:27 am 
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lost1750GTV wrote:
stock or gp style?
assuming they save a bunch of weight, etc, yeah I'm in.

stock , needed to drop my bike off for them to do fitment under stock bodywork.


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 Post subject: Re: Expansion chambers plans / drgs
PostPosted: Fri Jun 22, 2018 3:52 pm 
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Joined: Thu Mar 09, 2006 12:54 pm
Posts: 243
Location: Germany
You could try this guy:
http://www.npowerperformance.com

He does custom pipes for a living and I guess starting from a batch of one instead of 25.
Currently he's a bit busy but if you have a bit of time, it should be doable.
Edit: Correct form is "has been done"
Image

If anyone knows the BRC 500 project where they offer a 500 cc kit for the KTM300: Neil is doing the pipes for that kit.

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