My '93 K1100Rs came to me with a Corbin seat, which makes it possible to flat foot my 30 in inseam legs. l've been trying to come up with some kind of passenger back rest, and finally I noticed that the seat bottom has mounting pads that look like they are for that purpose . I have emailed Corbin today to see if they still have the parts for the older seats. The question is this: Can anyone tell me if that backrest works for them? I'm interested in any comments, KC