I know 125 vs 250f forums are not hard to find so I'm sorry about the new one but mine is a little different. I have a 05 yz125 with little work like wheels, reeds, plastics etc. but I'm a 5'9 135lb c class rider and am curious if I should sell my yz and get a 250f or just put more work into my yamaha? Does anyone have any ideas? I am looking for more power because as it is, I am pushing my 125 so hard to keep up that it just has issues... So should I get a 2011 or 12 kx250f (best priced bikes at local dealer) or should I build my yz? And if I keep the yz, what mods should I do? Thanks!