Originally Posted by Disco Dean
What I am saying I guess in a very verbose way is that the addition of an aftermarket air filter or pipe will retune a bike (for sure) but the bike ECU will retune it back and will change the mixture of the bike back to the prescribed parameters - as that is what the bike is constantly trying to do based on load, throttle, and sensors. Now if the bike is capable or not... I think so - some think not.
On this point, you're right and I've measured it. In the R1150 and R1200 documentation, there is clearly description of the Adaptation Values that would allow the fueling to get back to the settings of the Lambda sensor after an Adaptation period.