I am trying to decide on which bike I want to get. My friend has a CR250 and I am looking into getting one but I don't want to get one that I am going to get left behind on. I know how to ride and I used to have a dirtbike and I just recently sold my YFZ450 four wheeler. Between the 4 stroke and the 2 stroke how are the differences in a race in a straight drag on acceleration and top speed? I was even looking into getting a 450 dirtbike but I think it might be a bit much... i would rather have a 4 stroke for wheelies but I dont want to be alot slower. Thanks