No, not all motorcycles have engines. While the majority of motorcycles are powered by internal combustion engines, there are also other types of motorcycles that don't rely on traditional engines. Here are a few examples:
Electric motorcycles: Electric motorcycles are becoming increasingly popular. Instead of an internal combustion engine, they are powered by one or more electric motors and rely on a battery pack for energy storage. Electric motorcycles offer quiet operation, instant torque, and zero tailpipe emissions.
Pedal-assist bicycles (e-bikes): E-bikes are bicycles equipped with an electric motor that provides assistance to the rider's pedaling. While they are primarily pedal-powered, the motor provides additional power to make pedaling easier, especially on hills or for longer distances.
Scooters and mopeds: Scooters and mopeds are lightweight motorcycles that often have smaller engines compared to traditional motorcycles. They typically have an engine displacement ranging from 50cc to 250cc and are commonly used for urban commuting.
Motorized bicycles: Motorized bicycles, also known as motorized bikes or motor bikes, are bicycles fitted with a small engine, usually two-stroke or four-stroke, that provides additional power. These engines are typically smaller than those found in motorcycles and may require the rider to pedal to start or assist the engine.
It's worth noting that the term "motorcycle" can have different interpretations and definitions depending on local regulations and classifications. In some jurisdictions, the term may specifically refer to motorcycles with a certain engine displacement or power output, while other motorized two-wheelers may be classified differently.