Just machine your side cover so you can kick the bike the other way. Most of my bikes have this done to them. One of my banshees didn't like that too much though and the kicker moves a bit when I rev it. Its no revelation that a two stroke engine will run in either direction of rotation. Oh yeah, and the description of how the Bombardier system works isn't exactly right. The engine actually stops for a second before it starts running backwards.
Addditionally, since everyone seems to be interested, I have Catia files and G&M code for a set of cases similair toa the Mattoon cases. I have one engine built of this model. The downside is that it uses Banshee internals for the tranny, and its heavy, as machining the thickness equivalent of sheet metal isn't easy or quiet. If anyone is interested in one of these things and has a VMC to use, I'd sell them cheap.