What should a rider do if they need to stop quickly while leaning in a curve?

When a rider needs to stop quickly while leaning in a curve, the correct action is to gradually reduce the lean angle and apply more brake pressure as the motorcycle straightens. This technique is critical for maintaining stability and control during cornering. When leaning into a curve, applying too much brake suddenly can cause the motorcycle to lose traction, which could lead to a fall or loss of control. Therefore, reducing the lean angle allows the rider to upright the motorcycle slightly, which provides a more stable platform for braking. As the bike straightens out, it becomes safer to apply more braking pressure, enabling the rider to stop effectively without losing balance or traction.

The other options suggest actions that are less effective or potentially dangerous. For instance, quickly leaning further into the curve can increase the risk of losing traction, while releasing all brakes can lead to uncontrolled momentum and instability. Shifting weight to the rear may also compromise control, especially when more braking force is required. Understanding the dynamics of motorcycle handling is essential for safe riding, particularly in emergency situations during a turn.