According to the Motorcycle Industry Council, sales of motor scooters have more than doubled since 2000.
MOTOR SCOOTER: Like a motorcycle with a lower-powered engine and smaller wheel diameter. Scooters have a step-through frame and the engine rests under the seat or near the rear wheel axle, instead of between the rider's legs.
ENGINES ON SCOOTERS: Usually range from 30 cubic centimeters to 125cc, though some of the latest scooters have larger ones. Most scooters have a two-stroke or four-stroke engine. Many scooters have automatic "twist and go" transmissions. With manual transmission models, gears are shifted by hand instead of by foot.
MOPEDS: A scooter with a 50cc engine that maxes out at 30 to 35mph is classified as a moped. Some mopeds also have pedals like a bicycle.
Road motor scooters are very popular in Europe, India, China and Japan.
VESPA: the first road motor scooter and was initially manufactured in Italy after World War II. It is considered a classic and is among the most popular scooters on the market.
Electric motor scooters such as the eGo can travel about 20 to 30 mph at top speed.
NEWS REPORTS, COMPILED BY NEWS RESEARCHER BROOKE CAIN