TRUE. The fewer the cylinders the less smooth the engine. The greater the number of cylinders the more the motorcycle is suited to long distance touring.
FALSE. The available power to accelerate a motorbike from rest to 100km/h is not only dependent on the engine capacity. A heavy cruiser with a 1400cc engine and widely spaced gears is not designed for acceleration. By contrast a light weight 600cc sport bike with close ratio gears is.