What does 100cc mean for a motorcycle?

[CassandraRose]

It refers to the motorcycle's displacement of 100 milliliters. The calculation method for motorcycle displacement is: Cylinder cross-sectional area × Stroke × Number of cylinders = Total displacement in cc. Here, stroke refers to the reciprocating movement of the piston in the cylinder. The distance traveled by the piston from top dead center to bottom dead center is called the piston stroke, abbreviated as stroke. More details are as follows: Introduction 1: The working volume through which the piston moves from top dead center to bottom dead center is called the cylinder displacement. If the engine has multiple cylinders, the sum of all cylinders' working volumes is called the engine displacement, usually expressed in liters (L). Introduction 2: Engine displacement is one of the most important structural parameters, representing engine size more accurately than bore diameter and number of cylinders. Many engine specifications are closely related to displacement. In China, the most common large-displacement motorcycles are limited to models like 150cc, 200cc, and 250cc, but the highest market share still belongs to traditional small and medium displacements such as 100cc (scooters), 125cc, and 150cc.