yeh i'm dicing up between 2 stroke or 4 stroke, the powerband would be a lotta fun. in act and nsw the 2 strokes that come under the power weight limit are honda nsr250, yamaha tzr250 and the aprilia rs125. you can get nsr150's but i've heard a lot of stories about these blowing up quite easily. how easy is it to rebuild a nsr250? i'm doing auto at college pulling apart whip snips and mowers easily so i was wondering with a bit more experience i could do my own rebuilds.