A motorcycle (or motorbike) is a two-wheeled vehicle powered by an engine.
The wheels are in-line, and at higher speed the motorcycle remains upright
and stable by virtue of gyroscopic forces; at lower speeds continual
readjustment of the steering by the rider gives stability. The rider sits
astride the vehicle on a seat, with hands on a set of handlebars which are
used to steer the motorcycle, in conjunction with the riders weight shift
through their feet which are supported on a set of "footpegs" or "pegs"
which stick out from the frame.
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