Expansion chambers plans / drgs

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1601pete
Posts: 450
Joined: Fri Mar 10, 2006 5:37 pm
Location: Bristol, UK

Expansion chambers plans / drgs

#1 Post by 1601pete » Wed Jun 13, 2018 7:00 pm

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

smokamoto
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Joined: Thu Apr 06, 2006 12:18 am
Location: sacramento, ca

Re: Expansion chambers plans / drgs

#2 Post by smokamoto » Thu Jun 14, 2018 1:25 am

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.

smokamoto
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Joined: Thu Apr 06, 2006 12:18 am
Location: sacramento, ca

Re: Expansion chambers plans / drgs

#3 Post by smokamoto » Thu Jun 14, 2018 1:27 am

Here’s the link
http://www.rzrd500.com/500tsi/" onclick="window.open(this.href);return false;

smokamoto
Posts: 57
Joined: Thu Apr 06, 2006 12:18 am
Location: sacramento, ca

Re: Expansion chambers plans / drgs

#4 Post by smokamoto » Thu Jun 14, 2018 1:31 am

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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1601pete
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Re: Expansion chambers plans / drgs

#5 Post by 1601pete » Thu Jun 14, 2018 2:37 am

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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ns86
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Joined: Sat Oct 30, 2010 9:46 pm
Location: ontario canada

Re: Expansion chambers plans / drgs

#6 Post by ns86 » Thu Jun 14, 2018 11:17 am

I think MK had a good post on pipe building techniques if I could only find it!
1986 RG500
1985 RZ500
1986 NS400 HRC
1994 NSR250sp Rothhmans
1983 NS250 p
1987 RG250 WW p
1983 RG250 p
1992 RGV500 WW
1992 RGV500 Lucky Strike
1989 TZR500 Biaggi 3ma p
1984 RZV500 Rainey p

MK
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Location: Germany
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Re: Expansion chambers plans / drgs

#7 Post by MK » Thu Jun 14, 2018 2:55 pm

Can be found on rd350.gmxhome.de or directly:
http://l3s9113.zeus09.de/RD350/Auspuffb ... glisch.pdf" onclick="window.open(this.href);return false;
Bye
Martin

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1601pete
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Location: Bristol, UK

Re: Expansion chambers plans / drgs

#8 Post by 1601pete » Thu Jun 14, 2018 3:00 pm

That’s an excellent bit of info. Thanks ?

vdrive
Posts: 56
Joined: Fri Mar 18, 2016 2:17 am

Re: Expansion chambers plans / drgs

#9 Post by vdrive » Fri Jun 15, 2018 3:01 am

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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Mike Cichetti
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Re: Expansion chambers plans / drgs

#10 Post by Mike Cichetti » Mon Jun 18, 2018 10:10 am

My buddy would be in for a set.

vdrive
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Joined: Fri Mar 18, 2016 2:17 am

Re: Expansion chambers plans / drgs

#11 Post by vdrive » Wed Jun 20, 2018 3:40 am

Mike Cichetti wrote:My buddy would be in for a set.
well only need 24 more people ........

lost1750GTV
Posts: 87
Joined: Thu May 24, 2018 5:22 pm

Re: Expansion chambers plans / drgs

#12 Post by lost1750GTV » Wed Jun 20, 2018 8:53 am

stock or gp style?
assuming they save a bunch of weight, etc, yeah I'm in.

BigGuy
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Re: Expansion chambers plans / drgs

#13 Post by BigGuy » Thu Jun 21, 2018 8:53 pm

This sounds interesting!
Shake "N" Bake!

vdrive
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Joined: Fri Mar 18, 2016 2:17 am

Re: Expansion chambers plans / drgs

#14 Post by vdrive » Fri Jun 22, 2018 6:27 am

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.

MK
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Re: Expansion chambers plans / drgs

#15 Post by MK » Fri Jun 22, 2018 3:52 pm

You could try this guy:
http://www.npowerperformance.com" onclick="window.open(this.href);return false;

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.
Bye
Martin

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