You guys are all over the place on this one. I mean in regards to comparing 2 strokes to 4 strokes. 125 to 250 f \ 250 to 450 F. Chris loves riding the 250 2 stroke but when it comes to a serious race he would choose the 450F. I am not sure I agree with putting 250 2 stroke in with 250F but I don't know what the answer is because most 125 can not compete with 250f and 250 2 stroke can not always hang with 450F. Now I am talking stock bikes. Depends on the rider and a lot on the track. I can remember Kenny Henry really putting it to Chris at area 330 (chris was on the 2 stroke) but a few weeks later at Amherst it was a different story. Same bikes, same riders, different track. Should add they are both good A riders so the comparison is a good one.