2012 YAMAHA MT-03 AUX

TABLE OF CONTENTS
Checking the front fork....................6-27
Checking the steering.....................6-28
Checking the wheel bearings..........6-29
Battery .............................................6-29
Replacing the fuses ........................6-31
Replacing the headlight bulb ..........6-33
Replacing an auxiliary light bulb .....6-34
Replacing the tail/brake light bulb ...6-34
Replacing a turn signal light bulb....6-35
Replacing the license plate
light bulb...................................6-36
Supporting the motorcycle ..............6-36
Front wheel.....................................6-37
Rear wheel......................................6-38
Troubleshooting..............................6-39
Troubleshooting charts....................6-40
MOTORCYCLE CARE
AND STORAGE...................................7-1
Care ..................................................7-1
Storage.............................................7-3
SPECIFICATIONS ..............................8-1
CONSUMER INFORMATION..............9-1
Identification numbers.......................9-1

INSTRUMENT AND CONTROL FUNCTIONS
3-2
1
2
3
4
5
6
7
8
9
10
EAU10471
Main switch/steering lock
The main switch/steering lock controls
the ignition and lighting systems, and
is used to lock the steering.
NOTE:
Be sure to use the standard key (black
bow) for regular use of the vehicle. To
minimize the risk of losing the code re-
registering key (red bow), keep it in a
safe place and only use it for code re-
registering.
EAU36870
ON
All electrical circuits are supplied with
power, the meter lighting, taillight, li-
cense plate light and auxiliary lights
come on, and the engine can be start-
ed. The key cannot be removed.
NOTE:
The headlight comes on automatically
when the engine is started and stays
on until the key is turned to “OFF”,
even if the engine stalls.
EAU10660
OFF
All electrical systems are off. The key
can be removed.
EAU10680
LOCK
The steering is locked, and all electri-
cal systems are off. The key can be
removedT
o lock the steering
1. Push
2. Turn
1. Turn the handlebars all the way to
the left.
2. Push the key in from the “OFF”
position, and then turn it to
“LOCK” while still pushing it.
3. Remove the key.

1
2
3
4
5
6
7
8
9
10
INSTRUMENT AND CONTROL FUNCTIONS
3-3
To unlock the steering
1. Push
2. Turn
Push the key in, and then turn it to
“OFF” while still pushing it.
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”.
EAU10941
F(Parking)
The steering is locked, and the tail-
light, license plate light and auxiliary
lights are on. The hazard lights and
turn signal lights can be turned on, but
all other electrical systems are off. The
key can be removed.
The steering must be locked before
the key can be turned to “F”.
ECA11020CAUTION:
Do not use the parking position for
an extended length of time, other-
wise the battery may discharge.
EAU11003
Indicator and warning lights
1. Immobilizer system indicator light “ ”
2. Neutral indicator light “N”
3. Turn signal indicator light “y”
4. High beam indicator light “1”
5. Engine trouble warning light “U”
6. Coolant temperature warning light “u”
7. Fuel level warning light “K”
EAU26873
Immobilizer system indicator
light “ ”
The electrical circuit of the indicator
light can be checked by turning the
key to “ON”.
If the indicator light does not come on
for a few seconds, then go off, have a
Yamaha dealer check the electrical
circuit.

PERIODIC MAINTENANCE AND MINOR REPAIR
●Headlight lens
•Do not affix any type of tinted
film or stickers to the head-
light lens.
•Do not use a headlight bulb
of a wattage higher than
specified.
5. Install the headlight bulb cover,
and then connect the coupler.
6. Have a Yamaha dealer adjust the
headlight beam if necessary.
EAUB1380
Replacing an auxiliary
light bulb
1. Auxiliary light socket
2. Auxiliary light bulb
If the auxiliary light bulb burns out, re-
place it as follows.
1. Turn the handlebar to the right or
left side to access the auxiliary
light socket.
2. Remove the auxiliary light socket
(together with the bulb) by pulling it.
3. Remove the defective bulb by
pulling it out.
4. Insert a new bulb into the socket.
5. Install the auxiliary light socket
(together with the bulb) by push-
ing it in.
EAUB1370
Replacing the tail/brake
light bulb
1. Tail/brake light bulb cover
2. Cover bolts
1. Tail/brake light socket
2. Tail/brake light bulb
6-34
1
2
3
4
5
6
7
8
9
10

SPECIFICATIONS
8-3
1
2
3
4
5
6
7
8
9
10
Electrical system:
Ignition system:
Transistorized coil ignition (digital)
Charging system:
A.C. magneto
Battery:
Model:
GT9B-4
Voltage, capacity:
12 V, 8 Ah
Headlight:
Bulb type:
Halogen bulb
Bulb voltage, wattage x quantity:
Headlight:
12 V, 55 W/60 W x 1
Auxiliary light:
12 V, 3 W x 1
Tail/brake light:
12 V, 5 W/21 W x 1
Front turn signal light:
12 V, 10 W x 2
Rear turn signal light:
12 V, 10 W x 2
Meter lighting:
LED (backlight)
Neutral indicator light:
LED
Turn signal indicator light:
LED
High beam indicator light:
LED
Fuel level warning light:
LEDCoolant temperature warning light:
LED
Engine trouble warning light:
LED
Immobilizer system indicator light:
LED
Fuses:Main fuse:
30 A
Headlight fuse:
20 A
Signaling system fuse:
10 A
Ignition fuse:
10 A
Parking lighting fuse:
10 A
Radiator fan fuse:
7.5 A
Fuel injection system fuse:
10 A
Backup fuse (for odometer, clock and
immobilizer):
10 A

1
2
3
4
5
6
7
8
9
10
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