I have a fair amount of experience riding and working on them. I had a friend's Concours around here for several months when he moved away. I did much of the work on it over the years while he had it, so I became very familiar with it. The bike has a lot of pluses. It has a decent motor with that Kawasaki snarl. Good power, even though the bike is heavy, but you won't mistake it for a Hayabusa. I always thought the rep they have for vibration is greatly exaggerated.
The fairing is effective, as someone noted above, sometimes too effective. There are different height windshields available on the aftermarket. The big 7.5 gallon tank is nice on the road, but adds to the bike's top-heavy feel when full. Fuel mileage can be in the mid-forties. The stock bags are OK, but Happy Trails has a great setup with GIVI bags. Their mount tucks them in and is rock solid.
A minus is tire selection. It had oddball size wheels, so selection is limited. Dunlop still makes the D205 in those sizes last I looked, and are a good choice. Handling isn't that bad for a nearly 700 pound bike.
The shaft drive appears bullet-proof as long as basic maintenance is done. As is the rest of the drivetrain.
There has been plenty of aftermarket support, though that may start to fade now that the bike is no longer current.
Maintenance is not particularly difficult on it. You have to deal with the fairing, of course. Checking and adjusting tappet clearances is a little tedious due to stuff having to come off to get the top cover off. Everytime I did it, I found no clearances had changed.
I recommend 1994 and later models. Kawasaki did some useful upgrades that year.
Good ones are out there for a reasonable price. Lots of them, so you can pick and choose. If my 750 ever wears out, I might get one for a commuter scooter. Hope this helps.
