A motorcycle engine is a type of internal combustion engine specifically designed to power motorcycles. These engines typically come in two main types: two-stroke and four-stroke. Two-stroke engines are simpler and lighter, providing power with every revolution, while four-stroke engines are more fuel-efficient and produce less pollution, making them more common in modern motorcycles. Motorcycle engines can vary in size, measured in cubic centimeters (cc), which indicates the engine's displacement. Larger engines generally provide more power and speed. Additionally, motorcycle engines can be configured in various ways, such as single-cylinder, parallel-twin, or V-twin, each offering different performance characteristics and riding experiences.