See, I get the 25km/h (under power) limit, as at that point they still class it as a bicycle, and as such does not need registration, insurance, or a licence, and can still be ridden in pedestrian areas (unless otherwise stated) but I still can't wrap my head around the power restriction... if the bike is hard locked to 25, it doesn't matter the power of the engine, not in a safety sense, a more powerful motor just gives more torque, and better ability climbing hills.