Good God! You don't realize how much power and torque the 650R has (properly tuned/uncorked) until yo ride it back to back against a CRF450. Don't get me wrong, a 650R won't hang with the 450 on the mx track and I'm not trying to say that. I wrode a CRF450 and it was a blast! But when I climbed back on my 650R and grabbed a writst full in 3rd gear, you realize how much of a difference there really is. I'm keeping the 650R until I can no longer kick it over!