tight emissions regulations that were not applied to kei vehicles, a market sector in which 2 strokes dominated. Lack of torque? High rev power? What about motorcycle 4 strokes? What about detroit diesel 2 strokes? Torque and power, nothing to do with 2 versus 4 stroke but combustion chamber design, porting and stroke versus bore. Besides, you ever heard of a 730cc *DIESEL* engine putting out over 100 horsepower per litre (considered holy grail for petrol, let alone diesel which has lower horsepower per litre) while still meeting 50mpg urban and meeting european emissions requirements? 2 stroke magic.