i am thinking about a switching to a 450, but i need some advice. right now i have a 05 yz125, but i have owned a 02 yzf250 and a 04 crf250. the yzf never gave me any problems, but crf did, i needed valves after only 4 months of riding, i got angry and made a dumb decision and bought a 125, but i really don't like it all. i absolutely love 250f's, but i just don't feel like dealing with the maintenance that is involved, do you guys think that 450 need less maintenance compared to 250f's? also, i have never even rode a 450, how hard was it adapting to the power?