heres the deal I'm old 41 started riding at 36 on a 96 rm250 bought a new 03 yz250f and its time to upgrade.. dint know if i should get 06 yz250f and put a 262 kit in or et 06 yz450f.. my 03 is great but I'm not good enough at corner speed and when the track is muddy or sandy i don't have enough skill or power to jump consistently.... i hated the 04 yz450 way to jerky and bulky.. I rode and was starting to like 04 crf 450 after an hour.. I know that yam has been toning down the hit and Honda has been pumping up the crf .. so I would like the same motor as 04 crf or mellower with same or better handling... how does the 06 yz450 compare .. Im considering ettin the 06 and putting a flywheel weight in it. how heavy does it feel compared to my 03 250f ? while I'm at it how much faster is 06 yz250f compared the 03yz .. thanks for your constructive thoughts..