Except for in California, there are no EPA laws banning or restricting the emissions of "closed corse" vehicles. The AMA and their silly "double the cc" limit (that Honda was the first to exploit) have almost killed the 2 stroke. Looks like the AMA is finally pulling their head out of their collective arses and are seeing the value in letting the two strokes race in the ameture classes. If Yamaha, Suszuki and KTM start selling a bunch of two strokes in 2008, how long can the other manufacturers continue not selling them?