I currently race an 08' RMZ250. I just moved up to B-level. I'm looking to get a 2nd bike just for fun and would love an RM 2-stroke 04+. I weigh only 140lbs in full riding gear. The 250 2stroke would be nice since I can race it in some more classes. I can even race it in the 250f class at the track I race at if I wanted. Plus I can do the 450 and open classes. The 125 I know is a super lightweight fun bike which I know is probably better suited for my weight. Track I mainly race at is pretty technical and tight supercross style. I was thinking the 250 would be good with a flywheel weight, but would the bike handle right at my weight of 140lbs? I recently rode a friend's modified yz250 and I didn't like the snappy un-predictable feeling it had on the tight track. As I stated though, first mod I'd do to a 250 (if I got one), would be a flywheel weight anyways.