OK here is the deal. I have an 04 YZ450F and just sold my 03 YZ450F - love both bikes. The last couple of vet riders I ran into at the track have both sold there blue or red 450s for 250 four strokes. All have said that they have faster lap times on the new 250Fs. I have to start wondering would I be faster on a 250F or stick with my 450F. BTW I can beat both of the 250F guys on my 450F Maybe I just answered my own question. Has anyone rode both the 250F and 450F? What do you think? I just can't imagine enjoying the 250F as much as my nitro 450F.