I have a slighlty modified '05 CRF450X. New pipe, airbox/filter modified and a Baja Kit. My buddy has an '06 WR450. We did a 9hr, 225 mi. off-road epic last wknd to put both bikes through the grinder. (Both of us spend alot of time beating our Moto-X 450's on the track, so we know how to pound a big bikes into the ground). 1st observation was how much more torque the X had over the WR. 2nd was how superior the X's suspension was over the WR. Yes, the WR feels smaller and more nimble in the tight stuff, but, overall we both like the torque and bad-ass feel of the X. The WR did out-pull my X on a falt drag at 70+mph. I'll give that up for a better suspension and motor any day! He's selling his WR and shopping for an X!