2012 YAMAHA MT-03 stop start

INSTRUMENT AND CONTROL FUNCTIONS
3-4
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When the key is turned to “OFF” and
30 seconds have passed, the indicator
light will start flashing indicating the
immobilizer system is enabled. After
24 hours have passed, the indicator
light will stop flashing, however the im-
mobilizer system is still enabled.
This model is also equipped with a
self-diagnosis device for the immobi-
lizer system. (See page 3-7 for an ex-
planation of the self-diagnosis device.)
EAU11060
Neutral indicator light “N”
This indicator light comes on when the
transmission is in the neutral position.
EAU11020
Turn signal indicator light “y”
This indicator light flashes when the
turn signal switch is pushed to the left
or right.
EAU11080
High beam indicator light “1”
This indicator light comes on when the
high beam of the headlight is switched
on.
EWA10060
WARNING0
Never turn the key to “OFF” or
“LOCK” while the vehicle is moving,
otherwise the electrical systems
will be switched off, which may re-
sult in loss of control or an acci-
dent. Make sure that the vehicle is
stopped before turning the key to
“OFF” or “LOCK”.
EAU11530
Engine trouble warning light “U”
This warning light comes on or flashes
when an electrical circuit monitoring
the engine is defective. When this oc-
curs, have a Yamaha dealer check the
self-diagnosis system. (See page 3-7
for an explanation of the self-diagno-
sis device.)
The electrical circuit of the warning
light can be checked by turning the
key to “ON”. If the warning light does
not come on for a few seconds, then
go off, have a Yamaha dealer check
the electrical circuit.
EAU11440
Coolant temperature warning
light “u”
This warning light comes on when the
engine overheats. When this occurs,
stop the engine immediately and allow
the engine to cool.
The electrical circuit of the warning
light can be checked by turning the
key to “ON”.
If the warning light does not come on
for a few seconds, then go off, have a
Yamaha dealer check the electrical
circuit.
ECA10020
CAUTION:
Do not operate the engine if it is
overheated.
EAU11361
Fuel level warning light “K”
This warning light comes on when the
fuel level drops below approximately
4.25 L (1.12 US gal) (0.93 Imp.gal).
When this occurs, refuel as soon as
possible.

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INSTRUMENT AND CONTROL FUNCTIONS
3-5
The electrical circuit of the warning
light can be checked by turning the
key to “ON”.
If the warning light does not come on
for a few seconds, and then go off,
have a Yamaha dealer check the elec-
trical circuit.
NOTE:
This model is also equipped with a
self-diagnosis device for the fuel level
detection circuit. If the fuel level detec-
tion circuit is defective, the following
cycle will be repeated until the mal-
function is corrected: The fuel level
warning light will flash eight times, and
then go off for 3.0 seconds. If this oc-
curs, have a Yamaha dealer check the
vehicle.
EAUB1392
Multi-function meter unit
1. Speedometer
2. Tachometer
3. Clock
4. Odometer/Tripmeters/Fuel reserve tripmeter
5. “SELECT” button
6. “RESET” button
EWA12421
WARNING0
Be sure to stop the vehicle before
making any setting changes to the
multi-function meter unit.
The multi-function meter unit is equip-
ped with the following:
●a speedometer (which shows the
riding speed)
●a tachometer (which shows en-
gine speed)
●an odometer (which shows the to-
tal distance traveled)
●two tripmeters (which show the
distance traveled since they were
last set to zero)
●a fuel reserve tripmeter (which
shows the distance traveled since
the fuel level warning light came on)
●a clock
●a self-diagnosis device
●an indicator lights brightness con-
trol mode
To switch the speedometer and
odometer/tripmeter displays between
kilometers and miles, push the “SE-
LECT” and “RESET” buttons together
and turn the key to “ON”. When the
digits start flashing on the display,
push the “SELECT” button to choose
kilometers or miles.
NOTE:
Be sure to turn the key to “ON” before
using the “SELECT” and “RESET”
buttons.

EAU12343
Handlebar switches
Left
1. Pass switch “ ”
2. Dimmer switch “ / ”
3. Horn switch “ ”
4. Turn signal switch “ ”
5. Hazard switch “ ”
Right
1. Engine stop switch “ / ”
2. Start switch “ ”
EAU12350
Pass switch “ ”
Press this switch to flash the head-
light.
EAU12400
Dimmer switch “ / ”
Set this switch to “ ” for the high
beam and to “ ” for the low beam.
EAU12500
Horn switch “ ”
Press this switch to sound the horn.
EAU12460
Turn signal switch “ ”
To signal a right-hand turn, push this
switch to “ ”. To signal a left-hand
turn, push this switch to “ ”. When
released, the switch returns to the
center position. To cancel the turn sig-
nal lights, push the switch in after it
has returned to the center position.
EAU12660
Engine stop switch “/ ”
Set this switch to “ ” before starting
the engine. Set this switch to “ ” to
stop the engine in case of an emer-
gency, such as when the motorcycle
overturns or when the throttle cable is
stuck.
EAU12710
Start switch “ ”
Push this switch to crank the engine
with the starter.
ECA10050CAUTION:
See page 5-1 for starting instruc-
tions prior to starting the engine.
INSTRUMENT AND CONTROL FUNCTIONS
3-9
3

INSTRUMENT AND CONTROL FUNCTIONS
3-20
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With the engine turned off:
1. Move the sidestand down.
2. Make sure that the engine stop switch is turned on.
3. Turn the key on.
4. Shift the transmission into the neutral position.
5. Push the start switch.
Does the engine start?
With the engine still running:
6. Move the sidestand up.
7. Keep the clutch lever pulled.
8. Shift the transmission into gear.
9. Move the sidestand down.
Does the engine stall?
NOTE:
This check is most reliable if performed with a
warmed-up engine.
The neutral switch may be defective.
The motorcycle should not be riddenuntil checked by a
Yamaha dealer.
The sidestand switch may be defective.
The motorcycle should not be riddenuntil checked by a
Yamaha dealer.
The clutch switch may be defective.
The motorcycle should not be riddenuntil checked by a
Yamaha dealer.
After the engine has stalled:
10. Move the sidestand up.
11. Keep the clutch lever pulled.
12. Push the start switch.
Does the engine start?
The system is OK. The motorcycle can be ridden.
YES NO
NO YES
NO YES

EAU15950
EWA10270
WARNING0
Become thoroughly familiar
with all operating controls and
their functions before riding.
Consult a Yamaha dealer re-
garding any control or function
that you do not thoroughly un-
derstand.
Never start the engine or oper-
ate it in a closed area for any
length of time. Exhaust fumes
are poisonous, and inhaling
them can cause loss of con-
sciousness and death within a
short time. Always make sure
that there is adequate ventila-
tion.
Before starting out, make sure
that the sidestand is up. If the
sidestand is not raised com-
pletely, it could contact the
ground and distract the opera-
tor, resulting in a possible loss
of control.
EAUB1340
Starting the engine
In order for the ignition circuit cut-off
system to enable starting, one of the
following conditions must be met:
The transmission is in the neutral
position.
The transmission is in gear with
the clutch lever pulled and the
sidestand up.
EWA10290
WARNING0
Before starting the engine,
check the function of the igni-
tion circuit cut-off system ac-
cording to the procedure de-
scribed on page 3-20.
Never ride with the sidestand
down.
1. Turn the key to “ON” and make
sure that the engine stop switch
is set to “ ”.
ECAB0040CAUTION:
The following warning lights and in-
dicator lights should come on for a
few seconds, then go off.
Neutral indicator light
Turn signal indicator light
High beam indicator light
Engine trouble warning light
Coolant temperature warning
light
Fuel level warning light
Immobilizer system indicator
light
If a warning or indicator light does
not go off, see page 3-3 for the cor-
responding warning and indicator
light circuit check.
2. Shift the transmission into the
neutral position.
OPERATION AND IMPORTANT RIDING POINTS
5-1
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-41
Engine overheatingEWA10400
WARNING0
●Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be
blown out under pressure, which could cause serious injury. Be sure to wait until the engine has cooled.
●After removing the radiator cap retaining bolt, place a thick rag, like a towel, over the radiator cap, and then
slowly rotate the cap counterclockwise to the detent to allow any residual pressure to escape. When the hiss-
ing sound has stopped, press down on the cap while turning it counterclockwise, and then remove the cap.
NOTE:
If coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended
coolant as soon as possible.
Wait until the
engine has cooled.Check the coolant level
in the reservoir and radiator.
The coolant level is low.
Check the cooling
system for leakage.
The coolant level
is OK.
There is
leakage.
There is no
leakage.
Have a Yamaha dealer check
and repair the cooling system.
Start the engine. If the engine overheats again, have
a Yamaha dealer check and repair the cooling system.
Add coolant. (See NOTE.)

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INDEX
A
Air filter element, cleaning the
check hoses ..................................6-13
Air filter element, replacing ..............6-13
Anti-theft alarm (optional)...................3-8
Auxiliary light bulb, replacing ...........6-34
B
Battery ..............................................6-29
To access the battery....................6-29
To charge the battery....................6-30
To store the battery.......................6-31
Brake and clutch levers,
checking and lubricating ...............6-26
Brake fluid ........................................6-22
Changing......................................6-22
Checking fluid level.......................6-21
Brake lever .......................................3-11
Brake pads, checking.......................6-20
Brake pedal......................................3-11
Lubricating....................................6-26
C
Cables, checking and lubricating .....6-25
Care and storage...............................7-1
Cast wheels......................................6-19
Catalytic converter...........................3-13
Checking and lubricating the
brake and clutch levers.................6-26
Checking and lubricating the
brake pedal...................................6-26Checking and lubricating the
cables ...........................................6-25
Checking and lubricating the
sidestand......................................6-27
Checking and lubricating the
throttle grip and cable ...................6-25
Checking the sidestand switch.........3-20
Clock mode ........................................3-7
Clutch lever ......................................3-10
Clutch lever free play, adjusting .......6-19
Consumer information........................9-1
Controls and instruments ...................2-3
Function ..........................................3-1
Coolant.............................................6-12
Coolant temperature warning light .....3-4
D
Description .........................................2-1
Controls and instrument .................2-3
Left view..........................................2-1
Right view .......................................2-2
Dimmer switch....................................3-9
Drive chain, cleaning and
lubricating.....................................6-24
Drive chain slack ..............................6-23
Adjusting.......................................6-23
Checking.......................................6-23
E
Engine break-in ..................................5-3
Engine idling speed, adjusting .........6-14
Engine oil and oil filter element ..........6-8Engine oil filter element....................6-10
Engine stop switch.............................3-9
Engine trouble warning light...............3-4
F
Front fork, checking.........................6-27
Front wheel......................................6-37
Installing........................................6-37
Removing......................................6-37
Fuel ..................................................3-12
Fuel consumption, tips for reducing ...5-3
Fuel level warning light......................3-4
Fuel tank breather/overflow hose.....3-13
Fuel tank cap ....................................3-11
Fuses, replacing...............................6-31
H
Handlebar switches............................3-9
Dimmer switch................................3-9
Engine stop switch..........................3-9
Hazard switch ...............................3-10
Horn switch .....................................3-9
Pass switch .....................................3-9
Start switch .....................................3-9
Turn signal switch...........................3-9
Headlight bulb, replacing .................6-33
High beam indicator light ...................3-4
Horn switch ........................................3-9
I
Identification numbers........................9-1
Idling speed, adjusting .....................6-14
Ignition circuit cut-off system............3-19