the only supercharged/turbo'd 2 stroke I can think of is the old detroit diesels. Never seen it on a bike/atv stock.
When bikes/atv's have a turbo, it has a habit of going through reed valves/rotary valves at a high rate. They don't like the added pressure against whatever valving they use. But they can make some pretty sick power. 130hp out of a 350cc engine type levels. Quite sick when you consider that stock 671 detroits weren't terribly far from that level of HP (426ci, or 7.0L engines)
