Barry, do you look at a slipper as a piece that gets used daily, or is it just for an emergency bail out?
I recall my only other shaft drive bike..and I swore never again.....but it was a 79 Yamaha xs 11. It stuck in my mind so deeply I walked away from the c14 when I saw it had a shaft. The salesman had to say ..."Hey, wait a minute...its not what you are thinking. Hi,s father was the one who picked me up off the ground many years ago, btu I'll get to that.
Obviously the xs11 was no c 14 (or c10 for that matter) on a c scale it might have rated a negative 03. If you were driving down the road at 30 mph, and chopped the throttle suddenly, the rear tire would chirp. Sounded , and felt, like you locked your rear brake for a split second. You could adjust to this, and had to, but it sucked.
The rear suspension also extended when you hit the throttle. Topped out is the best description. Rather violently. Couple this with a small bump on the road and the rear tire was airborne.
So when Kawasaki added a slipper and made the shaft drive connect with linkages and such, they made the bike more fun and way more safe. Especially comparing the c14 hp at 130 and the Yamaha at 85, or so. I highsided that 11 in a straight line, for crying out loud, one afternoon when the bumpy road and rear topping out met in a very dangerous meeting.