A motorcycle with a single continuous fixed track, as you describe it, would not be possible to steer in the conventional sense. Steering on a motorcycle is typically achieved by leaning the vehicle to one side or the other, allowing it to change direction while maintaining balance.
A continuous fixed track would restrict the motorcycle's ability to lean and, therefore, make steering difficult. Without the ability to lean, the motorcycle would have a limited range of motion and would struggle to navigate corners or make turns effectively. The track would essentially force the motorcycle to move in a straight line.
Motorcycles with a single continuous fixed track do exist, but they are known as "trikes" or "three-wheelers" rather than traditional motorcycles. These vehicles have two wheels at the front and one wheel at the back, providing stability and a different steering mechanism. The front wheels can turn independently, allowing the vehicle to steer. However, these trikes still operate differently from motorcycles with two wheels.
In summary, a motorcycle with a single continuous fixed track would lack the necessary mechanism for conventional steering and would not be able to maneuver like a traditional motorcycle.