What is a primary characteristic of a "M2" motorcycle classification?

The primary characteristic of an "M2" motorcycle classification is that it refers specifically to a two-wheeled motorcycle. This classification is part of a system that categorizes different types of motorcycles based on their design and functionality. The "M2" designation indicates that the motorcycle is primarily intended for the use of riding on public roads and highways, emphasizing its capability as a standard two-wheeled vehicle.

The context of motorcycle classifications allows for the distinction between various types of vehicles, and understanding the "M2" classification helps riders recognize the requirements and regulations associated with operating these motorcycles on public roadways. The classification does not pertain to racing-specific motorcycles, electric motorcycles, or all types of motorcycles, but focuses solely on those that fit the criteria of being two-wheeled.