Fuel system
Fuel pump
Sends fuel under pressure to the injection system (fuel-injected bikes/scooters).
How it works
On injected models, an electric pump (often inside the tank) pressurizes fuel for the injectors. A weakening pump starves the engine of fuel under load: hesitation, power loss, stalling. Its pre-filter can also clog.
Maintenance tips
- Listen for the pump's faint hum when the ignition is turned on.
- Don't ride too often on reserve (the pump is cooled by the surrounding fuel).
Related symptoms
⚠️ The information on this page is provided for educational purposes to help you understand the role and operation of the part. It replaces neither a physical inspection nor the judgment of a certified mechanic. Before any work on a safety-critical component (braking, steering, transmission, suspension), have the part's condition confirmed by a professional.