I guess the fellow that owned this K1100RS should have bought an LT, as it seems he had tried to make it a Gold Wing. Anyhow, it had some kind of radio equipment that needed a Whip antenna, probably a C.B. radio?? None of that was there when I got the bike.
There is a mount for an Antenna on the rear right corner. It would clear any type of luggage in my opinion. If anyone wants it, it's free for the shipping. It looks well made, probably homemade, but decent.