In which situation should you use only the front brake?

Answer: B — If your rear tire goes flat

Using only the front brake is particularly important when your rear tire goes flat. This is because the rear brake, when engaged, can cause the motorcycle to lose stability since the rear wheel is no longer maintaining proper traction. In such a situation, relying solely on the front brake allows you to maintain more control and reduces the risk of losing balance or skidding. The front brake is typically stronger and provides better stopping power, which is critical for safely bringing the motorcycle to a stop or slowing down without risking a spill. In contrast, making a sharp turn generally requires a combination of both brakes to ensure stability and control. Riding downhill would also call for a balanced use of both brakes to manage speed and prevent overheating or excessive wear. In difficult weather conditions, using both brakes can assist in maintaining traction and control. Therefore, understanding when to rely solely on the front brake is crucial for safe riding, particularly in the scenario of a flat rear tire.