I know everyone has asked this question a million times, but I haven't so help me out. I have been waiting for years for that new 450f to come out from Kawasaki, but now I am leaning toward a new 250f. My last bike was a Husaberg 470, and it was pretty mellow compared to a mx bike. The thing is, I strictly race cross country/hare scrambles. The races are long, and the big four strokes tend to wear me out. Any advice on what to pick. I am not a big guy, 5'8 175 on a good day. Also, what are the most important mods to get all I can out of the little thumper for outdoor racing.