What does 750 refer to in a motorcycle?

Answer 1

The number 750 refers to the engine size, also known as engine displacement. It is the volume in cubic centimeters of a cylinder or cylinders that a piston moves in, as measured from the lowest to the highest position of the piston inside the cylinder. Twenty or thirty years ago, a motorcycle with a 750 cc engine was considered large, nowadays engines have become bigger, especially in road and touring bikes, and a 750 is now considered as a medium sized bike.