greetings crazy...
there were a few... 6 speed gear box... wet clutch... 60 amp alternator... abs 3... paralever... hardened drive shaft... greaseable u joints... 6 pod brakes...
j o
I have owned three K75 motorcycles. My current K brick is a 1993 K75S, it is a very nice rider and serves me well, but like you The sixth gear was always needed and I find myself trying to go to sixth when I am in fifth gear, especially when I have been astrid my R1100S which has a 6 speed tranny. However, you must be teasing as the K75 never had a 6 speed along with all the other improvements you mention :). It would have been darn near perfect had it ever been so equipped!
Now, as to the K75 vs the K100 and K1100s; the potential buyer should ride both if possible then decide. The smoothness of the K75 is difficult to beat. Power? Not a lot of torque but as you wind it will really gallop. On a recent ride on the Colorado plains I was running one hundred mph for about 80 miles behind an R1100RT. It will cruise easily at these speeds even two up. It probably helps if the operator and passenger are normal sized people. Finally, although thd K75RTs are the best tourers, the K75S has the better suspension and handling.