I have an 08 yz 450f and am thinking of stepping down to a 250f. Things I'm worried about are my weight and my endurance. I weigh 190lbs, no gear, and as far as endurance goes, the 450f kicks my butt. My question to you guys is, after getting the 250f suspension setup for my weight, would It be easier or harder for me to keep up my same pace. I understand the 250 is less bike and I would have to be on the gas more to stay consistant with my 450f lap times, but would the smaller bike help make up some time in the turns and with overall endurance? I'm a novice rider and only ride tracks.