Yamaha WR125R 2009 Service Manual

ELECTRIC STARTING SYSTEM
8-8
EAS27190
TROUBLESHOOTING
The starter motor fails to turn.
T
IP
• Before troubleshooting, remove the following part(s):
1. Battery cover
2. Battery
3. Headlight assembly
4. Fuel tank
NG →
OK ↓
NG →
OK ↓
OK →
NG ↓
NG →
OK ↓
NG →
OK ↓
NG →
OK ↓
NG →
OK ↓
1. Check the fuses.
(Main and ignition)
Refer to “CHECKING THE FUS-
ES” on page 8-65.
Replace the fuse(s).
2. Check the battery.
Refer to “CHECKING AND
CHARGING THE BATTERY” on
page 8-65.
• Refill battery fluid.
• Clean the battery terminals.
• Recharge or replace the battery.
3. Check the starter motor operation.
Refer to “CHECKING THE START-
ER MOTOR OPERATION” on page
8-72.
Starter motor is OK. Perform the electric
starting system troubleshooting, starting
with step 5.
4. Check the starter motor.
Refer to “CHECKING THE START-
ER MOTOR” on page 5-36.
Repair or replace the starter motor.
5. Check the starting circuit cut-off re-
lay.
Refer to “CHECKING THE RE-
LAYS” on page 8-67.
Replace the starting circuit cut-off relay.
6. Check the diode.
Refer to “CHECKING THE DIODE”
on page 8-69.
Replace the diode.
7. Check the starter relay.
Refer to “CHECKING THE RE-
LAYS” on page 8-67.
Replace the starter relay.

Yamaha WR125R 2009 Specifications

General

Engine Type	Liquid-cooled, 4-stroke, SOHC, 4-valve
Displacement	124.7cc
Bore x Stroke	52.0 mm x 58.6 mm
Compression Ratio	11.2:1
Fuel System	Fuel Injection
Ignition System	TCI
Starter System	Electric
Final Drive	Chain
Front Brake	Hydraulic single disc
Rear Brake	Hydraulic single disc
Seat Height	930 mm
Lubrication System	Wet sump
Rear Brake Diameter	220 mm
Overall Length	2, 180 mm
Overall Width	835 mm
Wheel Base	1, 430 mm
Transmission	6-speed
Front Suspension	Telescopic fork
Rear Suspension	Swingarm
Front Tire	80/90-21
Fuel Capacity	8.5 liters
Maximum Power	11.0 kW (15.0 PS) @ 9, 000 rpm
Maximum Torque	12.2 Nm (1.2 kg-m) @ 8, 000 rpm
Transmission System	Constant mesh
Frame	Steel
Oil Tank Capacity	1.15 litres