My boy and I are breaking away from the ATV scene. We've decided on a crf 70 for my 8yo. I'm hoping to get a XR/CRF 250. Since I'm buying used I'm open to other brands, but I just don't know all the different bikes. It has to be a 4 stroke. Can some one tell me other bikes I should be looking at? I'm trying to stay below $2500.