I saw this Jawa and sidecar at a restaurant in Beckley, WV a couple of years ago. It's unusual even seeing a sidecar m/c around here, but even more so with a two stroke engine. I've seen a few Jawa motocross bikes but never a twin cylinder street bike.
Sorry I didn't get a better picture of the sidecar.
Does anybody have any idea of the size of the engine or the approximate year of the bike?