My latest flame is a 1983 BMW R100RS named Gretel. She is quiet and smooth and pretty fast and very pretty IMO...but holy cow, are parts ever expensive.
Like geeeezzz Louise and the R100RS is an air-cooled boxer twin with no ABS, no on-board galley, restrooms, crew lounge, air suspension system, rider modes, electronic adjustable damping...anything....or even a rudimentary entertainment system and so it is about as complicated as a garden tractor. Now that I have it sorted, its fine - just fine. Oh, I have added a USB charger and it works super - but it cost $8 at the Chinesium store and so I bought two...just in case.
However, and this is not a slam...I'd guess that a more recent Bimmer, especially a six-cylinder liquid-cooled top of the range bahnschtermer is more along the lines of the space shuttle on the complexity scale.
Soooooo.....all I can say is, if that K1600 were under warranty and Uncle Hermann was paying the bills, then no problemo, but if it gets and old and crusty and you take over at cashier's wicket.....it might wind as much more fun to ride than it is to own.
Pete