High Quality Content by WIKIPEDIA articles! A motorcycle engine drives the rear wheel of a motorcycle and powers forward motion. The great majority of the world's motorcycles are manufactured and ridden outside of the wealthy, developed nations of the world. In the undeveloped and developing world, the single-cylinder engine is the norm, some four-strokes but also a great many two-strokes. For hundreds of millions of people in China, India, Southeast Asia and Africa, whose need is the least expensive motorized transportation, the single offers a balanced compromise of low price, power-to-weight ratio, fuel efficiency, ease of maintenance, and ease of manufacture. In a motorcycle, the engine configuration is normally readily apparent to the eye, and many motorcycles can be quickly identified by their cylinders, exhaust pipes, and cylinder heads.

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