me too, i'd only be looking at 130-175hp whilst also considering weight. the 130hp V4 yammy is a brilliant donk too, and quite cheap to buy (i've got a mate who's recently had one fitted to a 540br haines hunter). most of the bigger hp four strokes will simply weigh too much by the sounds of it, the beauty of the suzuki 140 is that it's a tuned up 90hp which keeps the weight down significantly. the 150 suzuki is a much better animal torque wise with it's bigger capacity, but the weight goes up by 15%.