The motorcycle is a single-track, two-wheeled motor vehicle powered by an engine. The earliest motorcycle was a coal-powered, two-cylinder, steam-driven motorcycle invented in 1867 by Sylvester Howard Roper.

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A motorcycle (also called a motorbicycle, motorbike, bike, or cycle) is a single-track, two-wheeled motor vehicle. Motorcycles vary considerably depending on the task for which they are designed, such as long distance travel, navigating congested urban traffic, cruising, sport and racing, or off-road conditions.

Motorcycles are the most affordable form of motorised transport in many parts of the world, and for most of the world’s population, they are also the most common type of motor vehicle. There are around 200 million motorcycles (including mopeds, motor scooters and other powered two- and three-wheelers) in use worldwide, or about 33 motorcycles per 1000 people. This compares to around 590 million cars, or about 91 per 1000 people. Most of the motorcycles, 58%, are in the developing countries of Asia,while 33% of the cars (195 million) are concentrated in the US and Japan. In the two countries of India and China, there are a total of only 6 million cars, but 71 million motorcycles. These numbers, worldwide, are dwarfed by the number of bicycles in use, estimated to be near twice the number of cars, or close to five times the number of motorcycles.