truckin-on, thank you for your reply.
Yes, I try modulating the throttle and this helps very much. But since switching to stage 1 I often get this "OMG, another unbearable loud biker!"-glimpse from bypassers in-town. And my ears develop after about half an hour of driving w/o plugs a tinnitus (I think this is the proper expression).
On tour the BB, wind and the pipes fight for "who is the loudest?", most likely stage 1 is winner.
By law I have to wear a helmet and you are right, the stage 1 pipes are a bit shorter than stock and therefore you sit closer to the pipes' ends. For me everything is perfect when I wear earplugs, but police might be attracted - I already had an unpleasant encounter with the stock pipes mounted when the M§W was rather new.
A DB-eater (or db-killer) or decibel slayer might reduce the sound by 3 to 5 db or more, I hope, therefore I am investigating.