I pulled two holeshots on my 03 450R this weekend. This bike has its original valves shims rings etc. I checked the valves before the season started and they were just at the low end. I just can't believe that this bike after all these years is still so competitive. It is by far the best bike I've ever owned. It definitely hasn't been used as much as some bikes, but still I think it has an exceptional performance for its age.