I'm running radials on my '95 K75RT right now. They're miss-matched, the rear is a 90-10 dual-sport tahr. I can't remember the makes/models right now. I can check tomorrow and update if anyone cares. I'll probably change to some other brand (of radials) next time.
Couple of things,
These tahrs are shorter profile than the bias so your RPM on the freeway it a bit high. On the other hand you can short shift more easily.
As I said, they're mis-matched (different brands) and when they were new, on the highway, there was some "wandering". Nothing too bad, but noticeable.
I'm going to stay with radials, it may take me a bit before I find the best brand/model though.
Tom