I am 42 and in fairly good shape. I am 6'2" and 200 lbs. I grew up on motorcycles and had a CR 250 and then a CRF 450 until a few years ago. I think I would say I am still a novice level rider. I can clear doubles, etc. Looking into a new bike. I always heard that because of my size I need a 450. When I had my crf 450 it seemed like such a beast. Tons of power. Would I be fine riding my local track and racing a little on a 250? Would a 250 be easier to handle and not dissipate my energy so fast? Or, with the new power settings on 450s could I use those to mellow out the power?