Yamaha YZF-R125 Service Manual: 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 the order given.

After the check and service of the malfunctioning part have been completed, reset the FI diagnostic tool display according to the reinstatement method.

Fault code No.: Fault code number displayed on the FI diagnostic tool when the engine failed to work normally. Refer to "Diagnostic code table".

Diagnostic code No.: Diagnostic code number to be used when the diagnostic mode is operated. Refer to "Sensor operation table" and "Actuator operation table".

Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


Troubleshooting details


    Setting the diagnostic mode
    1. Set the main switch to "OFF" and the engine stop switch to " ". 2. Disconnect the self-diagnosis signal connector "1", and then connect the FI diagnostic tool "2" as shown. 3. Disconnect ...

    Fuel pump system
    ...

    Other materials:

    Adjusting the throttle cable free play
    Throttle cable free play The throttle cable free play should measure 3.0-5.0 mm (0.12-0.20 in) at the throttle grip. Periodically check the throttle cable free play and, if necessary, adjust it as follows. TIP The engine idling speed must be correctly adjusted before checkin ...

    Protective apparel
    The majority of fatalities from motorcycle accidents are the result of head injuries. The use of a safety helmet is the single most critical factor in the prevention or reduction of head injuries. Always wear an approved helmet. Wear a face shield or goggles. Wind in your unprotecte ...

    Aftermarket Parts, Accessories, and Modifications
    While you may find aftermarket products similar in design and quality to genuine Yamaha accessories, recognize that some aftermarket accessories or modifications are not suitable because of potential safety hazards to you or others. Installing aftermarket products or having other modif ...

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