I've always thought that e-motor wattage was classified by the maximum that a motor can sustain constantly without overheating. Of course, they can accept more for short periods and some may be overrated or underrated by manufacturers. In CA, as well as much of the US AFAIK, this is 750w. Does anyone know of a different method of classification in any other state? Please note: this does not relate to anything about where they can be ridden legally, just how they are classified.