Hi all, I'm looking for a little bit of input. I'm thinking of upgrading to a wr450 or wr250 with the aluminum frame. I love my 99 yz400, but after riding an 04 crf250x, I think I want to try a bike that is a little less top heavy. The crf250x handles so much better than my bike in the single track. I would go for that in a heartbeat, but I don't trust that bike with all of the valve issues, and I also would like a little bit more power. I rode an 06 wr450f and it felt a lot heavier than my yz400. How would one of the aluminum framed wr450's compare to my yz400 in terms of handling? Would it be less top heavy feeling? I'm also considering doing a wr250f with an athena 290 kit to get the torque and light weight feeling. If anybody who has done a similar switch, I'd like to hear your opinions. Also, I have to do a wr to ride year around here in Kalifornia. Thanks!