If it were me, I probably would have gotten in trouble starting on a 650, but I'm only about 150-155 pounds. Just due to its ability to accelerate compared to the 300. The 650 does seem manageable enough though. The 2012 650 seems smoother than the 300 when cracking the throttle open a little or rolling around slow. A bit heavier, of course, but not bad at all. (I don't like how far the shifter is from the peg. My only issue. And I have a size 11.5 boot, I think.)