Re: Legality of 2 strokes.
The issue for the EPA is that car berated 2 strokes discharge a lot of crap into the water. Oil, unburned fuel soot, ect... On average they discharge about four times the amount that a four stroke does.
In this one while I hate the regulation I appreciate it. The EPA didn't say you couldn't use two strokes, just that if you did they had to meet certain discharge requirements. While this effectively eliminated all small two strokes it does allow manufacturers the ability to play with the technology if they can figure out a way to make them clean enough.