Scooters worldwide meet highly varied regulatory climates, since the classifications vary from country to country. For example, France, Italy and Spain allow drivers with an automobile driver's licence to operate motorcycles up to 125 cc. In order to ride larger motorcycles in those countries a rider would need an additional motorcycle licence. In most other E.U. countries, as well as in Japan, one can only ride motorcycles up to 50 cc with a automobile drivers license.
source:http://en.wikipedia.org/wiki/Scooter_%28motorcycle%29
