Sorry, I don´t agree.
The slightly richer cells at cruising speeds will smooth out throttle reactions, cause less heat, and even reduce fuel consumption as the combustion is more efficient than at lambda1 (afr 14,5).
In fact I played it safe and there are gains with an otimized (leaner) fuel at WOT and high revs. But it is at best 5hp with a stock bike and in most cases even a little less.
It will only be more if you remove the speed cutter and compare it to a restricted bike in the upper gears. (I agreed with Alain to keep the speed cutter active in my public maps. But everybody with a common licence can pay him some extra bucks to have it removed.)
Prost
Ulf