The laws regulating what vehicles are allowed on which roads vary from country to country, state to state, and sometimes even from highway to highway. Many states in the U.S. don’t have any laws regarding engine size, or else require a 50cc minimum–which the Yamaha Zuma 125 easily surpasses. Rather, most of them simply rely on the basic traffic laws that require you to travel at a safe speed on a given road. Some states are more restrictive. California, for instance, defines to wheeled vehicles that have an engine smaller than 150cc as a ‘motor-driven cycle,’ and according to the California DMV Motorcycle Handbook (pg. 2),
