2015 YAMAHA MT-125 engine oil

TABLE OF CONTENTSSAFETY INFORMATION.................. 1-1
DESCRIPTION.................................. 2-1
Left view ......................................... 2-1
Right view ....................................... 2-2
Controls and instruments ............... 2-3
INSTRUMENT AND CONTROL
FUNCTIONS...................................... 3-1
Main switch/steering lock............... 3-1
Indicator lights and warning
lights............................................ 3-2
Multi-function meter unit ................ 3-4
Handlebar switches ...................... 3-11
Clutch lever .................................. 3-13
Shift pedal .................................... 3-13
Brake lever.................................... 3-13
Brake pedal .................................. 3-14
ABS (for ABS models) .................. 3-14
Fuel tank cap ................................ 3-15
Fuel ............................................... 3-16
Catalytic converter ....................... 3-17
Rider seat ..................................... 3-18
Sidestand ..................................... 3-18
Ignition circuit cut-off system ....... 3-19FOR YOUR SAFETY –
PRE-OPERATION CHECKS............. 4-1
OPERATION AND IMPORTANT
RIDING POINTS................................ 5-1
Starting the engine .......................... 5-1
Shifting ............................................ 5-2
Tips for reducing fuel
consumption ................................ 5-3
Engine break-in ............................... 5-3
Parking ............................................ 5-4
PERIODIC MAINTENANCE AND
ADJUSTMENT................................... 6-1
Owner’s tool kit ............................... 6-2
Periodic maintenance chart for the
emission control system .............. 6-3
General maintenance and
lubrication chart ........................... 6-4
Removing and installing cowlings... 6-8
Checking the spark plug ................. 6-9
Engine oil and oil filter element ..... 6-10
Coolant.......................................... 6-13
Replacing the air filter element
and cleaning the check hose..... 6-14
Checking the engine idling
speed ......................................... 6-15
Adjusting the throttle grip free
play ............................................ 6-15
Valve clearance ............................. 6-16
Tires .............................................. 6-16Cast wheels .................................. 6-19
Adjusting the clutch lever free
play ............................................ 6-19
Checking the front brake lever
free play..................................... 6-20
Adjusting the brake pedal free
play ............................................ 6-20
Brake light switches ..................... 6-21
Checking the front and rear brake
pads .......................................... 6-21
Checking the brake fluid level ...... 6-22
Changing the brake fluid .............. 6-23
Drive chain slack........................... 6-24
Cleaning and lubricating the drive
chain.......................................... 6-25
Checking and lubricating the
cables ........................................ 6-26
Checking and lubricating the
throttle grip and cable ............... 6-26
Checking and lubricating the
brake and clutch levers ............. 6-26
Checking and lubricating the
brake pedal ............................... 6-27
Checking and lubricating the
sidestand................................... 6-27
Lubricating the swingarm
pivots......................................... 6-28
Checking the front fork ................. 6-28
Checking the steering................... 6-29
Checking the wheel bearings ....... 6-29
Battery .......................................... 6-30U5D7E4E0.book Page 1 Thursday, July 10, 2014 3:01 PM

DESCRIPTION
2-1
2
EAU10411
Left view
2
1
34
5
76
1. Battery (page 6-30)
2. Owner’s tool kit (for ABS models) (page 6-2)
3. Owner’s tool kit (page 6-2)
4. Fuse box (page 6-31)
5. Shift pedal (page 3-13)
6. Engine oil drain bolt (page 6-10)
7. Coolant reservoir (page 6-13)
U5D7E4E0.book Page 1 Thursday, July 10, 2014 3:01 PM

DESCRIPTION
2-2
2
EAU10421
Right view
YAMAHA
1
2
3
5
4
6
1. Spark plug (page 6-9)
2. Front brake fluid reservoir (page 6-22)
3. Engine oil filter element (page 6-10)
4. Dipstick (page 6-10)
5. Rear brake fluid reservoir (page 6-22)
6. Brake pedal (page 3-14)U5D7E4E0.book Page 2 Thursday, July 10, 2014 3:01 PM

INSTRUMENT AND CONTROL FUNCTIONS
3-2
3 To unlock the steering
Push the key into the main switch, and
then turn it to “OFF” while still pushing
it.
EAU49396
Indicator lights and warning
lights
EAU11021
Turn signal indicator light “ ”
This indicator light flashes when the
turn signal switch is pushed to the left
or right.
EAU11061
Neutral indicator light “ ”
This indicator light comes on when the
transmission is in the neutral position.
EAU11081
High beam indicator light “ ”
This indicator light comes on when the
high beam of the headlight is switched
on.
EAU11341
Fuel level warning light “ ”
This warning light comes on when the
fuel level drops below approximately
3.0 L (0.79 US gal, 0.66 Imp.gal). When
this occurs, refuel as soon as possible.
The electrical circuit of the warning
light can be checked according to the
following procedure.
1. Turn the key to “ON”.
2. If the warning light does not come
on, have a Yamaha dealer check
the electrical circuit.
1. Push.
2. Turn.12
1. Turn signal indicator light Ž
2. Neutral indicator light Ž
3. High beam indicator light Ž
4. Tachometer high-rpm warning light
5. Fuel level warning light Ž
6. Engine trouble warning light Ž
7. Anti-lock Brake System (ABS) warning
light Ž (for ABS models)ZAUM1226
SELECT
RESETkm/L/100kmMPG
km/h
MPH
Lo
Hi
1/2ODO
FTRIP12
x1000r/min
OILOIL
123
5
4
6
7
ABS
U5D7E4E0.book Page 2 Thursday, July 10, 2014 3:01 PM

INSTRUMENT AND CONTROL FUNCTIONS
3-10
3 Oil change indicator “OIL”
This indicator flashes (message “OIL
SERV” will also appear) to indicate that
the engine oil should be changed. It will
come on at the initial 1000 km (600 mi)
service interval, 2000 km (1200 mi) af-
ter that, and every 3000 km thereafter.
After changing the engine oil, reset the
oil change indicator.
To reset the oil change indicator dis-
play (mode “ODO” should be select-
ed), push the “RESET” button for two
seconds until “OIL SERV” message
flashes and then push and hold the
“RESET” button for at least 15 sec-
onds. “DIST SERV” mode (oil service
reminder which shows the riding dis-
tance since last reset) will also be reset.
TIPIf the engine oil is changed before the
oil change indicator comes on (i.e. be-
fore the set oil service interval has been
reached), the indicator must be reset
for the next oil change to be indicated
at the correct time. To reset the oil
change indicator before the periodic oil
change interval has been reached, fol-
low the below procedure.
To reset the oil change indicator (mode
“ODO” should be selected), select
“DIST SERV” by pushing the “INFO”
button, and then push the “RESET”
button for two seconds until “DIST
SERV” mode flashes and then push
and hold the “RESET” button for at
least 15 seconds, “OIL SERV” mes-
sage will also be reset.
Low battery warning indicator “ ”
This indicator flashes (message “LOW
BATT” will also appear) when the bat-
tery voltage is under 10 volts.TIPIf the low battery indicator comes on
have a Yamaha dealer check the bat-
tery.
ZAUM1158
Lo
Hi
OIL
Lo
Hi
ZAUM1159
Lo
Hi
U5D7E4E0.book Page 10 Thursday, July 10, 2014 3:01 PM

INSTRUMENT AND CONTROL FUNCTIONS
3-11
3Warning message function
The warning message function works
in conjunction with fuel meter, coolant
temperature meter, oil change indica-
tor, and low battery indicator by dis-
playing a corresponding warning
message. When two or more warning
messages occur, display shall be
changed as follows:
HIGH TEMP →LOW FUEL →LOW
BATT →OIL SERV
TIPPush the “INFO” button to switch be-
tween these display warning messag-
es.
Self-diagnosis device
This model is equipped with a self-di-
agnosis device for various electrical
circuits.
If a problem is detected in any of those
circuits, the engine trouble warning
light will come on and the display will
indicate an error code.
If the display indicates any error codes,
note the code number, and then have
a Yamaha dealer check the vehicle.NOTICE
ECA11591
If the display indicates an error
code, the vehicle should be checked
as soon as possible in order to avoid
engine damage.
EAU1234H
Handlebar switchesLeft
ZAUM1160
Lo
Hi
1. Error code displayZAUM1161
1/2
F TRIP
1/2
1
1. Pass switch Ž
2. Dimmer switch / Ž
3. Turn signal switch / Ž
4. Horn switch ŽZAUM1162
U5D7E4E0.book Page 11 Thursday, July 10, 2014 3:01 PM

FOR YOUR SAFETY – PRE-OPERATION CHECKS
4-1
4
EAU15598
Inspect your vehicle each time you use it to make sure the vehicle is in safe operating condition. Always follow the inspection
and maintenance procedures and schedules described in the Owner’s Manual.
WARNING
EWA11152
Failure to inspect or maintain the vehicle properly increases the possibility of an accident or equipment damage.
Do not operate the vehicle if you find any problem. If a problem cannot be corrected by the procedures provided in
this manual, have the vehicle inspected by a Yamaha dealer.Before using this vehicle, check the following points:
ITEM CHECKS PAGE
Fuel• Check fuel level in fuel tank.
• Refuel if necessary.
• Check fuel line for leakage.3-16
Engine oil• Check oil level in engine.
• If necessary, add recommended oil to specified level.
• Check vehicle for oil leakage.6-10
Coolant• Check coolant level in reservoir.
• If necessary, add recommended coolant to specified level.
• Check cooling system for leakage.6-13
Front brake• Check operation.
• If soft or spongy, have Yamaha dealer bleed hydraulic system.
• Check brake pads for wear.
• Replace if necessary.
• Check fluid level in reservoir.
• If necessary, add specified brake fluid to specified level.
• Check hydraulic system for leakage.6-21, 6-22
U5D7E4E0.book Page 1 Thursday, July 10, 2014 3:01 PM

OPERATION AND IMPORTANT RIDING POINTS
5-4
5500–1000 km (300–600 mi)
Avoid prolonged operation above 8000
r/min.
Rev the engine freely through the
gears, but do not use full throttle at any
time. NOTICE: After 1000 km (600 mi)
of operation, the engine oil must be
changed, the oil filter cartridge or el-
ement replaced, and the oil strainer
cleaned.
[ECA10322]
1000 km (600 mi) and beyond
The vehicle can now be operated nor-
mally.NOTICE
ECA10311
Keep the engine speed out of
the tachometer red zone.
If any engine trouble should oc-
cur during the engine break-in
period, immediately have a
Yamaha dealer check the vehi-
cle.
EAU17214
ParkingWhen parking, stop the engine, and
then remove the key from the main
switch.
WARNING
EWA10312
Since the engine and exhaust
system can become very hot,
park in a place where pedestri-
ans or children are not likely to
touch them and be burned.
Do not park on a slope or on soft
ground, otherwise the vehicle
may overturn, increasing the
risk of a fuel leak and fire.
Do not park near grass or other
flammable materials which
might catch fire.
U5D7E4E0.book Page 4 Thursday, July 10, 2014 3:01 PM