Yamaha YZF-R125 Service Manual: Fuel pump system

Troubleshooting details

This section describes the measures per fault code number displayed on the FI diagnostic tool. Check and service the items or components that are the probable cause of the malfunction following t ...

Circuit diagram

4. Main fuse 5. Main switch 9. Battery 17.Engine stop switch 25.ECU (engine control unit) 30.Fuel pump 64.Ignition fuse ...

Other materials:

Troubleshooting
Although Yamaha motorcycles receive a thorough inspection before shipment from the factory, trouble may occur during operation. Any problem in the fuel, compression, or ignition systems, for example, can cause poor starting and loss of power. The following troubleshooting charts repre ...

Checking the rear brake disc
1. Remove: Rear wheel Refer to "REAR WHEEL" on page 4-12. 2. Check: Brake disc Damage/galling → Replace. 3. Measure: Brake disc deflection Out of specification → Correct the brake disc deflection or replace the brake disc. Refer to "CHECKING THE FRONT BRAKE DIS ...

Checking the engine oil level
1. Stand the vehicle on a level surface. NOTE: Place the vehicle on a suitable stand. Make sure the vehicle is upright. 2. Start the engine, warm it up for several minutes, and then turn it off. 3. Check: Engine oil level The engine oil level should be between the minimum level ...