What should you do if your front tire goes flat while riding?

If your front tire goes flat while riding, applying the rear brake to slow down is the appropriate action to take. This method helps maintain stability and control as the motorcycle is decelerated. When dealing with a flat front tire, the handling characteristics of the motorcycle can change significantly. The front tire provides crucial steering and stability, and applying the rear brake allows for a more controlled descent in speed without losing balance.

Using only the front brake can cause the motorcycle to tip forward, potentially leading to a loss of control and an increased chance of a crash. Accelerating, as suggested by one of the choices, is counterproductive because it would exacerbate the loss of control experienced when the front tire is compromised. Stopping immediately can also be risky if done without proper control, especially if it leads to abrupt movements or skidding. Therefore, gradually using the rear brake helps manage the situation more safely.