I ordered two different F&S back rest for my 1600 and had the same problem as vulcanrob. Sent both back and finally found a dealer with one in stock, but had to make a 140 mile run to get it. Before leaving I took it from the box and it had the same problem. Dealer tried to make it work, but finally got tired of fooling with it and threw to the ground. Fortunately they had one installed on a floor bike and since I had already paid and they didn't have another in stock, they gave me this one. Pretty obvious that F&S have issues and I know that Kawasaki knows about them. What I don't understand is why they allow it to continue.