I have a 07 450 and ordered a Hinson clutch for it. Apparently Yamaha changed the pressure plate for 07 and Hinson can`t tell me yet if the 06 pressure plate will work. I went ahead and ordered one for a 06 because I couldn`t imagine that it wouldn`t work, but now I am second guessing myself. You seem to have a pretty good knowledge of the 450 so I thought I would ask you. Thanks!