Red Seal Motorcycle Technician Practice Exam

How does the throttle-by-wire system work?

1. It uses a mechanical cable for throttle control

2. It electronically controls the throttle position

3. It adjusts engine timing automatically

4. It regulates fuel flow to the engine

The correct answer is: It electronically controls the throttle position

The throttle-by-wire system operates by electronically controlling the throttle position rather than using a mechanical cable. In this system, the rider's input from the throttle grip is converted into electronic signals. These signals are sent to the engine control unit (ECU), which then adjusts the throttle plate position accordingly, allowing for more precise control of the engine's air intake. This electronic method provides several advantages, including improved responsiveness, the ability to implement advanced features like traction control and cruise control, and better integration with other electronic systems in modern motorcycles. Unlike a mechanical cable control system, which relies on physical linkage to adjust the throttle, the throttle-by-wire system can adapt quickly to various riding conditions and provide feedback to the rider for enhanced performance and safety.