I went out yesterday to my local garbage pit track. I rode my YZ450 for about an hour, and when you ride on a hard, choppy, rutted rock laiden track with many tight corners, having a more forgiving bottom end is PRICELESS. I had a good rythem going on my YZ. I then jumped on my buddies '06 KX450F, and man did I struggle with that bike! His KXF is all hard hitting bottom to mid snap and power. I kept feeling the front end lift and push in all the corners. We also did a 200 yard drag race and he did beat me by about a bike length, but again the other 90% of the time, the YZ IMO is the preferred bike. My buddy even commented he loved my YZ.