Greetings! I would love to learn from you, anything noteworthy regarding the WR450F, for the years 2005 through 2009. I know that the frame went from steel to aluminum in 2007. Personally, I'm fine with a steel frame. Another bike of choice for me over the years has been Husqvarna. Husky has never gone to aluminum frames. Now if the aluminum frame WR handles better because the weight distribution and the geometries are better, I'd love to learn about this. I also read tid-bits about engine and transmission improvements through the years 2005 - 2009, but I can't tell if I'm reading about definite problems and/or improvements, or if I'm reading about one guy having a problem, and now the whole year is tarred. The aluminum frame bikes do look more modern. No argument from me on this. But if the engine and trans are solid in the 2005 2006 years, and the handling is very close to that of the aluminum frame bikes, I will probably buy the earlier bike. Now why I've cut off the bikes earlier than 2005, I have no good reason. One concern I have with going much older than 2005 is that general old age starts to show up. All the plastic and rubber parts are starting to get old. Anyway, I'd love to chat with you all about this. Thanks!