I recently purchased a used OEM backrest assembly for my 06, tried to install it and realized I am missing a part. The part is a black piece I believe that allows a place for the rear seat to fit into it. It appears it would have 3 holes and at least 1 bolt goes through the rear fender. The person I bought it from swears he had no such part installed on his bike. My question is did earlier vmax grab bars maybe have that part but not machined into the grab bar or is he just BSing me because he sold me an incomplete assembly? Also, does anyone know if that is a part that can be had through a Yamaha dealership? I noticed several threads about the backrests being hard to obtain through the dealer. Thanks.