Take it from the mouth of a Yamaha hater...the 450 is a mean race machine...I followed one this weekend, for lap after lap...it was by far a better mx machine than the raptor

 

I'll throw another YFZ kudos in. I don't care one way or the other, I ride a 1947 Suzuki with a steam engine and leather chain, but I been on just about everything out there, and ridden a couple of YFZ's and there ain't nothin like it. In fact it makes most other quads seem kinda stupid.