I have an 04 wr450. I brought it new in 05 to save some money. Shortly after, I read the reviews on the 05 wr´s. In 05, yamaha lightened up the 450 to get a feel that is simualr to the Honda 450X. The review stated that the 05 was a much better handling bike and felt a lot lighter. Yamaha also redid the exhaust to make the 05 a \