Newbie here. I have a lot of experience with 2 stroke engines (motorcycles, polaris skis, various outboard brands), and I've really become interested in getting a speedster, but 4 strokes make me nervous (I do a lot of motorcycle racing and have seen more problems in the last few years since the 4 stroke "revolution".). Anyway, is there any particular year/configuration of 2 stroke speedster that I should look for or avoid? There seems to be a wide variety of models available where I live, and I'm only looking for enough power to pull a slalom skiers.