I noticed from one of your posts that you installed the adapter plate on the front pulley of your 06 for the Yamaha billet pulley case cover set. I'm doing that now, but noticed that the shaft is smaller on the late model bikes (mine is an 07, and has same output shaft as yours.) So, the adapter plate doesn't center well on the shaft. How did it work for you? Any problems with loosening over time, wobbling, etc.? I have a post going about this topic in the technical forum, if you'd like to weigh in there, so others could see too.