Yamaha YZF-R125 Service Manual page 270

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ELECTRICAL COMPONENTS...................................................................... 8-57
CHECKING THE SWITCHES ................................................................. 8-59
CHECKING THE BULBS AND BULB SOCKETS ................................... 8-62
CHECKING THE FUSES ........................................................................ 8-63
CHECKING AND CHARGING THE BATTERY....................................... 8-64
CHECKING THE RELAYS ...................................................................... 8-66
CHECKING THE TURN SIGNAL RELAY ............................................... 8-66
CHECKING THE DIODE ......................................................................... 8-67
CHECKING THE SPARK PLUG CAP ..................................................... 8-68
CHECKING THE IGNITION COIL ........................................................... 8-68
CHECKING THE IGNITION SPARK GAP............................................... 8-69
CHECKING THE CRANKSHAFT POSITION SENSOR.......................... 8-69
CHECKING THE LEAN ANGLE SENSOR.............................................. 8-69
CHECKING THE STARTER MOTOR OPERATION ............................... 8-70
CHECKING THE STATOR COIL ............................................................ 8-70
CHECKING THE RECTIFIER/REGULATOR .......................................... 8-71
CHECKING THE HORN.......................................................................... 8-71
CHECKING THE FUEL SENDER ........................................................... 8-72
CHECKING THE SPEED SENSOR ........................................................ 8-72
CHECKING THE RADIATOR FAN MOTOR ........................................... 8-72
CHECKING THE COOLANT TEMPERATURE SENSOR....................... 8-73
CHECKING THE THROTTLE BODY SENSOR ASSEMBLY.................. 8-73
CHECKING THE FID (FAST IDLE SOLENOID) ..................................... 8-75