Hi, I was talking with a shop the other day about a catchpot setup and mentioned about routing them downstream of the oxygen sensors. Anyone heard of this before? I suppose it would provide a vacum effect and the crap that would normally go to the intake would just burn off in exhaust headers.

you get reversion in da exhaust pipe , esp in a single pipe per cylinder , cheers

So I have a 2 into 1 D&D Fat Cat exhaust. Do you reckon she’d be a no go.

Just go to atmosphere

Agree , its a greenie save the lesbian whales solution to burn off the crap

+1 or into a small catch can - easy enough to make with some old exhaust pipe.

Got it done and uploaded some pics.

I mentioned this some time ago in another thread about a Vac-U-Pan style breather I will do it on mine when time permits

I did notice that on your system there is no one way valve, I think its a must you can use a single one in the line running down to the pipe from memory S&S make a valve suitable

when I get time I will find the valve that I looked at using and post up a part number

Cheers Rocket. I would have thought the need for the check valve would be minimal as the system provides a venturi effect. Gas would follow the path of least resistance, but on the other hand I guess you have pistons going up and down providing I guess a sucking effect on the down stroke.  Is that what your getting at?  The bike feels to me like it revs a little easier, slightly different note at idle. I'm thinking about doing it to my M8 Tourer which I have had to go back to the Screaming Eagle Air Cleaner ( from the Arlen Ness Big Sucker) due to oil down the side of panniers on a long hard run.