Which of the following is NOT one of the six primary motorcycle controls?

The headlight switch is indeed not one of the six primary motorcycle controls. The primary controls on a motorcycle typically include the throttle, clutch lever, front brake lever, rear brake pedal, gear shifter, and handlebars, which are used for steering. These controls are essential for operating the motorcycle safely and effectively, allowing the rider to manage speed, braking, shifting gears, and steering.

In contrast, the headlight switch is more of an accessory control, affecting the visibility and safety of the motorcycle but not directly influencing its operation in terms of speed or maneuvering. Understanding the primary controls is crucial for any rider, as they form the foundation for safe riding practices. Familiarity with these controls enables efficient handling of the motorcycle under different riding conditions.