Hi Rick. I think you mean Kenda Tires. I just put a set on my 1992 R100RT and so far so good. It's the first set of Kenda's I've ever tried. They look good and handle good for the money. I've only put about 1500 km on them so far.
I realize they might be significantly different than the tires on your R1250RT. For one thing the tires I bought are bias ply and I expect the tires that would fit on your bike would likely be radial ply.
Anyway with my limited experience with the brand, my experience is so far so good.