I can't say much about k1100's.
Did it have one of the so called comfort seats, there are a few types, I think. I'm also over six foot and my knees were touching the knee panels. I put one of the more flat top like seats on, and that helped cause it sits back a little bit more.
I also had a ridiculous amount of engine heat on my legs when I got my brick on the road. I temporarily removed the gaiter between the fairing and the forks, I think that's when the problem disappeared, so l left them off.
You will see that some RT models also have air vents to cool your legs, then the knee panels also have slots to accept the air from the vents.