2006 620 MTS: (yea it's a multistrada, but this forum is just great and it's the same engine as a monster 620!)
Planing on getting Leo Vince slip ons. I'm not necessarily expecting large/any engine performance increase, but more concernced about running too lean. Any advise or links to helpful threads I may have missed in my search would be helpful.
Lots of good info here: http://www.ducatimonsterforum.org/index.php?topic=48241.0 (http://www.ducatimonsterforum.org/index.php?topic=48241.0)
If you just have slip ons, no need. If you alter the intake with a higher flowing filter, open air box etc you'll need to add fuel. Powercommander is a good way to do so.
The Fat Duc is an 02 sensor spoof - the 620, at least the Monster, doesn't have one.
Thanks for the helpful replies.