The improvement in Rideability can be huge.
I say "can" as compared to "will", on the basis of respecting the posted experiences of some others where they felt they got no improvement.
Meanwhile, my 919 was transformed by it in terms of rideability.
Specifically low gear low revs in creepy crawly and stop and go traffic.
It went from being like a bucking bronco that needed clutch work to duck it, to being able to walk it by throttle alone down to well below 1000 RPM and with rheostat like characteristic speed up the walk and then to rolling.
The infamous "stink" was reduced, but it did not at all come close to getting rid of it.
As added insight, the sound at idle changed, to the degree that even my wife noticed it without any kind of prompting.
Same experience for me
So you expect me to feel a clear difference with the PC III and the maps suggested?
I am running stock mainly, Hiflo filter and Danomoto cans which have no baffles.
That would be splendid. Though I know I must set the TPS properly.
For now, I will steer clear of the custom mapping from the mechanic, who is also a tuner. See how the maps are after the thing is installed. Will aim to take the bike for a proper weekend riding next weekend perhaps, and try a few maps.
I guess I revert to what I have said about bikes in general...I have never really got that much into setting them up to suit me, instead just got used to getting the most out of the bike from adjusting to ride the thing. Learning on a XT250 with no brakes in the english countryside, then a clapped out Honda H100, then TZR125, then Cb1-400, Cbr600F, R6, R6...wasnt until the FZ1 when I made any adjustments or mods whatsoever. And those were very significant in the changes they produced.
With the 919...I have come to love the thing, but assumed without spending big money that I do not have, I would not be able to change the ride significantly.