Exhaust mod

scottI · L Plate Warrior Joined: 19 Mar 2004 Karma :

https://www.wemoto.com/library/spadafiche/037.gif
What is the box where the two pipes meet (3)is it a muffler or a cat converter ...its of an 89 250cc.. if I were to remove this and have some custom pipework done would it be louder Cool

or dont bother I just cant justify spending heaps on an after market system..
Cheers

kev · I Hump Things Joined: 07 Oct 2002 Karma :

I really don't think its a cat at all but I could be wrong.

From the pic it looks like a bros so it is just a collector box which you could do away with but it may mean rejetting.
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carvell · Scuttler Joined: 05 Sep 2003 Karma :

I don't think it's a bros.

Below is a bros.
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Yamaha TDM 850

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

At that age I would very much doubt it is a catalytic converter. Almost certainly just a collector box. You could replace it with some pipework, but make sure the guy making it knows what they are doing as it would be quite easy to screw up with the lengths and loose power.

All the best

Keith
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