What action should you take if your throttle sticks?

If your throttle sticks, the most appropriate action is to squeeze the clutch and use the engine cut-off switch. This approach is crucial for safely managing a situation where the motorcycle accelerates uncontrollably due to a stuck throttle. By squeezing the clutch, you disengage the engine from the transmission, allowing you to maintain control of your bike and prevent it from accelerating further. Meanwhile, utilizing the engine cut-off switch stops the engine altogether, which ensures that the motorcycle will no longer be powered and will gradually come to a stop.

The other options do not effectively address the situation. Accelerating to clear the throttle could lead to a loss of control and increase the risk of an accident. Shifting to a lower gear may not help in stopping or controlling the throttle's acceleration in that moment. Applying the rear brake only would not adequately slow down the motorcycle if the engine power remains unregulated, potentially resulting in further complications.