Of all the things I might be tempted to toss money at with respect to this bike the engine is not one of those things. It is near perfection IMO. The mapping on mine seems to be perfect. I have never felt like I needed more power or smoother throttle response in the adventure mode. Sure, my Duc 998 would leave it for dead on the tarmac, but so what?
Just a non-issue as far as I am concerned.
my favorite bike - R1200GS