The engine displacement of a motorcycle, such as 600cc, does not solely determine its speed or performance. While a 600cc motorcycle can be quite powerful and fast, there are several other factors that influence a motorcycle's speed, such as its weight, aerodynamics, engine design, gearing, and rider skill.
In general, 600cc motorcycles are considered to be in the middle range in terms of power and speed. They are commonly used for a variety of purposes, including sport riding, touring, and commuting. However, there are motorcycles with larger engine displacements (such as 800cc, 1000cc, or even higher) that can be faster and more powerful. Additionally, the specific model and make of the motorcycle, as well as any modifications or enhancements, can significantly affect its speed.
It's important to note that speed and performance should always be approached responsibly, adhering to local traffic laws and safety regulations.