I've only had my 2007 919 over a month now but have tinkered with the exhaust and PAIR system already.
As soon as I did the bafflectomy I heard the deceleration popping so I did the PAIR mod. I don't recall noticing the stink pre-bafflectomy.
From what I've read it seems the PAIR system if you leave the stock exhaust alone would help reduce stink. http://en.wikipedia.org/w/index.php?...&printable=yes
I've got a stock set of exhausts that have not been messed with yet and I'm thinking of putting them back on as well as PAIR system.
Thoughts or comments?