The throttle body is a critical component in a motorcycle’s fuel injection system. It controls the amount of air entering the engine by adjusting the throttle plate or valve based on the rider's input through the throttle grip. The throttle body regulates airflow, which, combined with fuel injected by the system, determines engine performance and responsiveness. Typically housed in a chamber with sensors and actuators, the throttle body ensures smooth acceleration, efficient fuel consumption, and optimal engine performance by precisely managing air intake.