The 2005 Yamahas are on the Transworld site. As expected, aluminum frame for the 2 strokes but not the thumpers. For the most part, it looks a "bold new graphics" year for four strokes. Sounds like they tried to make the 450 motor a little smoother and CRFish . Also looks like the lineup gets some other goodies like CR style brake routing and Renthal bars. Here's the TWMX link.