Yamaha YZF-R125 Service Manual: Troubleshooting
If the fuel pump fails to operate.
NOTE:
- Before troubleshooting, remove the following part(s):
1. Rider seat
2. Fuel tank
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 ...
Electrical components
1. Main switch
2. Clutch switch
3. Front brake light switch
4. Ignition coil
5. Throttle body sensor assembly (intake air
pressure sensor, intake air temperature
sensor, throttle position se ...
Other materials:
Installing the valves
The following procedure applies to all of the
valves and related components.
1. Deburr:
Valve stem end
(with an oil stone)
2. Lubricate:
Valve stem "1"
Valve stem seal "2"
(with the recommended lubricant)
3. Install:
Lower spring seat "1"
Valve stem seal "2"
V ...
Checking and lubricating the cables
The following procedure applies to all of the inner
and outer cables.
WARNINGDamaged outer cable may cause the cable to
corrode and interfere with its movement. Replace
damaged outer cable and inner cables
as soon as possible.
1. Check:
Outer cable
Damage Replace.
2 ...
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 ...