What is the Difference Between 100cc and 125cc?

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The difference between 100cc and 125cc motorcycles lies in their displacement, which affects engine power. A 125cc engine has a larger displacement, resulting in greater power and better performance, but it also consumes more fuel compared to a 100cc engine. The difference between 100cc and 125cc is not significant. Generally, a 100cc motorcycle can reach speeds of around 80 km/h, while a 125cc motorcycle can achieve speeds between 80–90 km/h. Some 100cc and 125cc models may go faster, but the top speed difference is typically around 10 km/h. In some cases, a 125cc motorcycle may only reach around 80 km/h. However, due to its larger displacement, a 125cc engine offers better acceleration, starting performance, and load-carrying capability. Generally, motorcycles with larger displacements produce more horsepower and torque. In China, common displacements include 70cc, 90cc, 110cc, 125cc, 150cc, and 250cc, while imported motorcycles often feature 125cc, 250cc, 400cc, 600cc, and 1000cc engines. Displacement refers to the total volume swept by all the pistons from top dead center to bottom dead center, multiplied by the number of cylinders. It is a crucial structural parameter that determines engine size and performance. Typically, a larger displacement results in higher power output. Displacement is often used as a standard for comparing engine sizes. Actual displacement is calculated based on cylinder diameter and piston stroke. Manufacturers select a nominal displacement close to the actual value and use it to classify the motorcycle. Motorcycle displacement is usually measured in cubic centimeters (cc). However, the actual displacement of a motorcycle may differ slightly from its model designation. For example, a 125cc engine typically has an actual displacement of around 124ml or 124.5ml, while a 100cc engine may have a slightly lower actual displacement.