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YAMAHA YZ125LC 2010 Owners Manual YZ125LC 2010 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/53911/w960_53911-0.png YAMAHA YZ125LC 2010 Owners Manual

Page 8 of 166

YAMAHA YZ125LC 2010  Owners Manual HOW TO READ DESCRIPTIONS
To help identify parts and clarify pro-
cedure steps, there are exploded dia-
grams at the start of each removal 
and disassembly section.
1. An easy-to-see exploded diagram

Page 17 of 166

YAMAHA YZ125LC 2010  Owners Manual 1-7
CHECKING OF CONNECTION
4. During the machine disassembly, 
clean all parts and place them in 
trays in the order of disassembly. 
This will speed up assembly time 
and help assure that all parts a

Page 24 of 166

YAMAHA YZ125LC 2010  Owners Manual 1-14
CLEANING AND STORAGE
CLEANING AND STORAGE
CLEANING
Frequent cleaning of your machine 
will enhance its appearance, maintain 
good overall performance, and ex-
tend the life of many components.
1.

Page 32 of 166

YAMAHA YZ125LC 2010  Owners Manual 2-8
TIGHTENING TORQUES
CHASSIS
△- marked portion shall be checked for torque tightening after break-in or before each race.
Carburetor joint M6 × 1.0 4 10 1.0 7.2
Carburetor joint clamp M4 × 0.7 1

Page 33 of 166

YAMAHA YZ125LC 2010  Owners Manual 2-9
TIGHTENING TORQUES
△Handlebar lower holder M12 × 1.25 2 40 4.0 29
△Steering ring nut M28 × 1.0 1 Refer to TIP.
Front fork and damper assembly M51 × 1.5 2 30 3.0 22
Front fork and adjuster M

Page 38 of 166

YAMAHA YZ125LC 2010  Owners Manual 2-14
CABLE ROUTING DIAGRAM
1. High tension cord
2. "ENGINE STOP" button lead
3. Ignition coil lead
4. Clamp
5. CDI unit
6. CDI unit band
7. Radiator breather hose
8. CDI magneto lead
9. Connector cove

Page 47 of 166

YAMAHA YZ125LC 2010  Owners Manual 3-6
ENGINE
ENGINE
CHECKING THE COOLANT LEVEL
Do not remove the radiator cap 
"1", drain bolt and hoses when the 
engine and radiator are hot. Scald-
ing hot fluid and steam may be 
blown out under pre

Page 48 of 166

YAMAHA YZ125LC 2010  Owners Manual 3-7
ENGINE
3. Radiator cap
2. Apply the specified pressure.
3. Inspect:
• Pressure
Impossible to maintain the speci-
fied pressure for 10 seconds→
Replace.
CHECKING THE COOLING 
SYSTEM
1. Inspect:

Page 50 of 166

YAMAHA YZ125LC 2010  Owners Manual 3-9
CHASSIS
c. Inspect the gasket (oil check bolt), 
replace if damaged.
d. Tighten the oil check bolt.
CHANGING THE TRANSMISSION 
OIL
1. Start the engine and warm it up 
for several minutes and wait

Page 51 of 166

YAMAHA YZ125LC 2010  Owners Manual 3-10
CHASSIS
A. Front
B. Rear
d. Place the other end of the tube 
into a container.
e. Slowly apply the brake lever or 
pedal several times.
f. Pull the lever in or push down on 
the pedal. Hold the l
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