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Yamaha WR125X 2009 Service Manual

Yamaha WR125X 2009
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ENGINE
3-10
8. Install:
Spark plug
9. Connect:
Spark plug cap
EAS28920
CHECKING THE ENGINE OIL LEVEL
1. Stand the vehicle on a level surface.
T
IP
Place the vehicle on a suitable stand.
Make sure the vehicle is upright.
2. Start the engine, warm it up for several min-
utes, and then turn it off.
3. Check:
Engine oil level
The engine oil level should be between the
minimum level mark a and maximum level
mark b.
Below the minimum level mark Add the
recommended engine oil to the proper level.
T
IP
Before checking the engine oil level, wait a few
minutes until the oil has settled.
Do not screw the engine oil filler cap (dipstick)
1 in when checking the oil level.
NOTICE
ECA22B1020
Engine oil also lubricates the clutch and the
wrong oil types or additives could cause
clutch slippage. Therefore, do not add any
chemical additives or use engine oils with a
grade of CD c or higher and do not use
oils labeled ENERGY CONSERVING II
d.
Do not allow foreign materials to enter the
crankcase.
4. Start the engine, warm it up for several min-
utes, and then turn it off.
5. Check the engine oil level again.
T
IP
Before checking the engine oil level, wait a few
minutes until the oil has settled.
EAS20810
CHANGING THE ENGINE OIL
1. Start the engine, warm it up for several min-
utes, and then turn it off.
2. Place a container under the engine oil drain
plug.
3. Remove:
Engine oil filler cap (dipstick) 1
Engine oil drain plug 2
O-ring 3
Spring 4
Engine oil strainer 5
T
R
.
.
Spark plug
13 Nm (1.3 m·kgf, 9.4 ft·lbf)
Type
SAE 10W-30, SAE 10W-40, SAE
15W-40, SAE 20W-40 or SAE
20W-50
Recommended engine oil grade
API service SG type or higher,
JASO standard MA
1
1
b
a
-20 -10 0
10
20 30
40
50 ˚C
SAE 10W-30
SAE 15W-40
SAE 20W-40
SAE 20W-50
SAE 10W-40
SAE 10W-50

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Yamaha WR125X 2009 Specifications

General IconGeneral
Displacement124.7cc
Bore x Stroke52.0 mm x 58.6 mm
Compression Ratio11.2:1
Cooling SystemLiquid-cooled
Fuel SystemFuel Injection
IgnitionTCI
Front SuspensionTelescopic forks
Rear BrakeSingle disc, 220 mm
Wet Weight137 kg
Lubrication SystemWet sump
Starter SystemElectric
Final TransmissionChain
Overall Width835 mm
Overall Height1, 165 mm
Wheel Base1, 430 mm
Engine TypeLiquid-cooled, 4-stroke, SOHC
Rear SuspensionSwingarm (link suspension)
Front BrakeSingle disc, 298 mm
Front Tire110/70-17
Rear Tire140/70-17
Maximum Power11.0 kW (15.0 PS) @ 9, 000 rpm
Maximum Torque12.2 Nm @ 8, 000 rpm
FrameSteel
Front Tyre110/70-17
Rear Tyre140/70-17
Oil Tank Capacity1.15 L

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