i have a 08 WR 250F with all the free mods including FMF exhaust. I was think about upgrading to a 15' YZ250F. My question how much more powerful is the new YZ compared to the WR. I know yes the new bike is faster but is it going to be night and day faster? I don't need tons more speed for what I do I just was curious on the power of the new bike compared to mine.