I might be trading my 04 KX250F for an 03 YZ450F so I wanted to find some things out before I get one. I've rode an 05 YZ450f and liked it a lot, did they changed much from 03 to 05 or do they run close to the same? Another thing are there any known problems with these bikes or this particular year I should know about or are they holding up pretty good? I would appreciate any help or info on this bike. I've never heard a bad thing about these bikes and from what I know the reliabilty is great but I'd just like to make sure.