When is it appropriate for passengers to get on a motorcycle?

When considering the safe boarding of passengers on a motorcycle, it is crucial for their safety and stability that they do so only when the motorcycle is in a stationary and controlled state. Having passengers get on after the engine has started may indicate that the motorcyclist is prepared for the journey ahead, but more importantly, the motorcycle needs to be at rest to ensure that the driver can properly balance and control the vehicle while the passenger is getting on.

When passengers mount the motorcycle while it is idle, it allows the operator to focus on stabilizing the bike and managing any shifts in weight, ensuring a smooth and secure transition. Mounting before the motorcyclist mounts could lead to an unstable situation as the driver tries to balance themselves. Likewise, having passengers get on before the engine starts could lead to a lack of awareness regarding the vehicle's readiness to move. Lastly, allowing passengers to board while the engine is still running can also create an unsafe environment, as the motorcyclist may not have the full attention needed for managing the bike during this critical moment.

Therefore, the most appropriate practice is for passengers to get on after the motorcycle has come to a full stop, prioritizing safety and stability for everyone involved.