Yamaha YZF-R125 Service Manual: Troubleshooting method
The engine operation is not normal and the engine trouble warning light comes on.
1. Check:
- Fault code number
a. Check the fault code number displayed on the FI diagnostic tool.
b. Identify the faulty system with the fault code.
Refer to "Self-Diagnostic Function table".
c. Identify the probable cause of the malfunction.
Refer to "Diagnostic code table".
2. Check and repair the probable cause of the
malfunction.
3. Perform fuel injection system reinstatement action.
Refer to "Reinstatement method" of table in "TROUBLESHOOTING DETAILS" on page 8-41.
4. Set the main switch to "OFF" and back to "ON", and then check that no fault code number is displayed.
NOTE:
If other fault codes are displayed, repeat steps (1) to (4) until no fault code number is displayed.
5. Erase the malfunction history in the diagnostic mode. Refer to "Sensor operation table (Diagnostic code No. 62)".
NOTE:
Setting the main switch to "OFF" will not erase the malfunction history.
The engine operation is not normal but the engine trouble warning light does not come on.
1. Check the operation of the following sensors
and actuators in the diagnostic mode. Refer
to "Sensor operation table" and "Actuator operation
table".
If a malfunction is detected in the sensors or actuators, repair or replace all faulty parts.
If no malfunction is detected in the sensors and actuators, check and repair the inner parts of the engine.
Self-diagnostic function table
If the ECU detects an abnormal signal from a sensor while the vehicle is
being driven, the ECU illuminates
the engine trouble warning light and provides the engine with alternate
operating instru ...
Diagnostic mode
It is possible to monitor the sensor output data or check the activation of
actuators with the FI diagnostic
tool connected to the vehicle and set to the normal mode or the diagnostic
monitoring ...
Other materials:
Cast wheels
To maximize the performance, durability,
and safe operation of your vehicle,
note the following points regarding the
specified wheels.
The wheel rims should be checked
for cracks, bends or warpage before
each ride. If any damage is
found, have a Yamaha dealer replace
the wheel. ...
Owner's tool kit
Owner's tool kit
Owner's tool kit
Engine oil drain attachment
The owner's tool kit is located under the
rider seat.
The service information included in this
manual and the tools provided in the
owner's tool kit are intended to assist
you in the performance of preventive
maint ...
Installing the primary drive gear and balancer gears
1. Install:
Balancer driven gear "1"
Lock washer
Balancer drive gear "2"
Primary drive gear
Washer "3"
Balancer driven gear nut
Primary drive gear nut
NOTE:
Align the punch mark "a" in the balancer drive
gear "2" with the punch mark "b" in the balancer
driven gear "1".
...