Well, to conclude the discussion on the seat, I see no indication that it is anything other than stock. There is an x of y stamp (something like "349/500") on the underside to suggest that it's part of a batch, but nothing that looks like a manufacturer's label.
So now I have a bigger problem: remember I mentioned this bike being "growly"? It is, and it loses torque rather dramatically (in my opinion) at low RPM (below 2000) in a manner that other bikes I've ridden recently don't, and it seems to miss when running at around 2000 - 2500, constant speed, no load. I've dropped the thing a couple of times doing tight turns from a stop already. The dealer insists that there is nothing wrong, but both an experienced friend and the local Kawasaki dealer believe it's missing. The friend thinks I should just change the plugs and see what happens, and the dealer thinks it needs a carb clean, because it mostly sorts itself out at around 3000 - 3500. It never seems to have the smoothness of a Honda or any other Japanese engine, however, and I'm rather dissatisfied with the roughness. It seems to me that as the Connie has a development history of twenty years, and because it's based on the Ninja which was bordering on legendary, it should be smooth as silk, but this one definitely is not.
So the question is, "Did Kawasaki make a three cylinder Concours? with a spare pot?" ;-) Kidding of course!!
Bottom line: does the have Concours a rough, "English-sounding" engine, or should it be smooth like other Japanese bikes?
Thanks for all your valuable help on my re-entry into motorcycling, by the way.