What characteristic defines a properly-fitted motorcycle?

A properly-fitted motorcycle allows the rider to touch the ground with their feet while seated. This characteristic is crucial for maintaining balance and control when the motorcycle is stationary or traveling at low speeds. Being able to place both feet flat on the ground enhances the rider's stability and confidence, especially when maneuvering in tight spaces or when stopping. This aspect not only contributes to safety but also improves the overall riding experience, as it allows the rider to feel secure on the motorcycle.

While the other characteristics such as reaching the handlebars comfortably, seeing over the windshield clearly, and adjusting the mirrors easily are also important for a good riding experience, they do not directly impact the fundamental control and balance that comes from having both feet on the ground. Thus, the ability to touch the ground is a defining feature of a properly-fitted motorcycle.