I had a HD back rest on my 07, it was ok but I had to bend the backrest mounts just a little to make it feel right, it bulged into the lower part of my back until I did that. What does the backrest for the 09 feel like ,are you happy with it, do you feel like it needs to go a little farther back to be more comfortable?
WWflyingace posted a pic comparison of the two brackets side by side between the old bracket and the new -09 bracket. Here's the pic. You can see the difference and how it is back a little farther.
I bought the new style adjustable one for my '09.
It is kind of like a Mustang backrest now, it pivets with your back and it has a lot smaller and thinner pad.
I bought the new adjustable one and it works great (but looks like sh*t) so I just keep it in the saddlebag when I'm not riding. The Mustang one looks much better (imo) and is about the same $$.
The 09 brackets are MUCH better. (at least the fixed mount, cannot say about the adjustable) I was never happy with the pre-09 HD backrests, not matter what I did. The 09s are much better positioned.
The 07 and 08 must fit the same. I have a HD backrest on a 08 on StreetGlide and it seem to push me too far up to the tank. I have it on a Tallboy seat..I need the room, Im 6'1. Is there a better backrest? If so I will be selling mine.