What is classified as an "M2" motorcycle?

An "M2" motorcycle classification specifically refers to motorcycles that have two wheels and are typically designed for street use, with the intent of distinguishing them from other types of motorcycles or vehicles. This classification is part of a broader system that categorizes motorcycles based on their design and capabilities. The designation helps to clearly identify the type of motorcycle being referenced, which is essential for licensing and regulation purposes.

It's important to understand that the other options represent different types of motorcycles or configurations: motorcycles with sidecars (which may be classified differently due to their additional attachments), three-wheeled motorcycles (often classified as "trikes" and subject to different licensing requirements), and off-road motorcycles (which are designed for non-paved surfaces and may not meet street-legal requirements). These variations serve specific markets and uses, but they do not fall under the "M2" classification, which is solely for two-wheeled motorcycles.