
Table of contents
Safety 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 ....................................3-14
Brake pedal ...................................3-14
ABS (for ABS models) ...................3-15
Fuel tank cap.................................3-16
Fuel................................................3-16
Catalytic converter ........................3-18
Rider seat ......................................3-18
Sidestand ......................................3-19
Ignition circuit cut-off system........3-20
For your safety – pre-operation
checks...............................................4-1
Operation and important riding
points.................................................5-1
Starting the engine ..........................5-2
Shifting ............................................5-3
Tips for reducing fuel
consumption ................................5-4
Engine break-in ...............................5-4
Parking ............................................5-5
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 the
cowlings and panel ......................6-7Checking the spark plug ................. 6-9
Engine oil and oil filter element ..... 6-11
Coolant ......................................... 6-14
Replacing the air filter element
and cleaning the check hose..... 6-15
Checking the engine idling
speed......................................... 6-16
Adjusting the throttle grip free
play ............................................ 6-16
Valve clearance ............................. 6-17
Tires .............................................. 6-18
Cast wheels .................................. 6-20
Adjusting the clutch lever free
play ............................................ 6-21
Checking the front brake lever
free play ..................................... 6-22
Adjusting the brake pedal free
play ............................................ 6-22
Brake light switches ...................... 6-23
Checking the front and rear brake
pads........................................... 6-23
Checking the brake fluid level....... 6-24
Changing the brake fluid............... 6-25
Drive chain slack ........................... 6-26
Cleaning and lubricating the drive
chain .......................................... 6-27
Checking and lubricating the
cables ........................................ 6-28
Checking and lubricating the
throttle grip and cable ............... 6-28
Checking and lubricating the
brake and clutch levers ............. 6-29
Checking and lubricating the
brake pedal................................ 6-29
Checking and lubricating the
sidestand ................................... 6-30
Lubricating the swingarm pivots... 6-30
Checking the front fork ................. 6-31
Checking the steering ................... 6-31
Checking the wheel bearings ....... 6-32
Battery .......................................... 6-32
Replacing the fuses ...................... 6-34
Replacing a headlight bulb ........... 6-35
Replacing an auxiliary light bulb ... 6-36
Tail/brake light .............................. 6-36
U5D7E6E0.book Page 1 Wednesday, June 17, 2015 10:25 AM

Description
2-1
2
EAU63371
Left view
234
5 761
1. Battery (page 6-32)
2. Owner’s tool kit (for ABS models) (page 6-2)
3. Owner’s tool kit (page 6-2)
4. Fuse box (page 6-34)
5. Shift pedal (page 3-13)
6. Engine oil drain bolt (page 6-11)
7. Coolant reservoir (page 6-14)
U5D7E6E0.book Page 1 Wednesday, June 17, 2015 10:25 AM

Periodic maintenance and adjustment
6-34
6
EAUM3461
Replacing the fuses
The fuse boxes, which contains the
fuses for the individual circuits, are lo-
cated under the rider seat. (See page
3-18.)
If a fuse for the individual circuits is
blown, replace it as follows.
1. Turn the key to “OFF” and turn off
the electrical circuit in question.
2. Remove the blown fuse, and then
install a new fuse of the specified
amperage. WARNING! Do not
use a fuse of a higher amperage
rating than recommended to
avoid causing extensive dam-
age to the electrical system and
possibly a fire.
[EWA15132]
TIP
tool kit. Use the tongs to remove and
install a fuse.
YZF-R125
YZF-R125A
1. Fuse box
ZAUM1188
1. Headlight fuse
2. Signaling system fuse
3. Ignition fuse
4. Radiator fan motor fuse
5. Main fuse
6. Backup fuse
7. Spare fuse
1. Headlight fuse
2. Signaling system fuse
3. Ignition fuse
4. Radiator fan motor fuse
5. Main fuse
6. ABS control unit fuse
7. Spare fuse
8. Backup fuse
9. ABS solenoid fuse
10.ABS motor fuse
ZAUM1189
1010
157.5
5207.5 7.515 20
5
7
12
3
45
6
ZAUM1231
10
303020
7
8
91010
157.5
207.5 7.515
5 20
5
7
12
3
45
6
U5D7E6E0.book Page 34 Wednesday, June 17, 2015 10:25 AM

Periodic maintenance and adjustment
6-35
6 3. Turn the key to “ON” and turn on
the electrical circuit in question to
check if the device operates.
4. If the fuse immediately blows
again, have a Yamaha dealer
check the electrical system.
EAU34242
Replacing a headlight bulb
This model is equipped with halogen
bulb headlights. If a headlight bulb
burns out, have a Yamaha dealer re-
place it and, if necessary, adjust the
headlight beam.
Specified fuses:
Main fuse:
20.0 A
Ignition fuse:
7.5 A
Signaling system fuse:
7.5 A
Headlight fuse:
15.0 A
Radiator fan motor fuse:
5.0 A
ABS control unit fuse:
10.0 A (YZF-R125A)
ABS motor fuse:
30.0 A (YZF-R125A)
ABS solenoid fuse:
20.0 A (YZF-R125A)
Backup fuse:
10.0 A
U5D7E6E0.book Page 35 Wednesday, June 17, 2015 10:25 AM

Specifications
8-3
8
Wheel travel:
130 mm (5.1 in)
Rear suspension:
Type:
Swingarm (link suspension)
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
114 mm (4.5 in)
Electrical system:
System voltage:
12 V
Ignition system:
TCI
Charging system:
AC magneto
Battery:
Model:
12N5.5-4A / YUASA
Voltage, capacity:
12 V, 5.5 Ah
Headlight:
Bulb type:
Halogen bulb
Bulb voltage, wattage × quantity:
Headlight:
12 V, 55.0 W × 2
Brake/tail light:
LED
Front turn signal light:
12 V, 10.0 W × 2
Rear turn signal light:
12 V, 10.0 W × 2
Auxiliary light:
12 V, 5.0 W × 2
License plate light:
12 V, 5.0 W × 1
Meter lighting:
LED
Neutral indicator light:
LED
High beam indicator light:
LED
Turn signal indicator light:
LED
Fuel level warning light:
LED
Engine trouble warning light:
LEDABS warning light:
LED (YZF-R125A)
Fuse:
Main fuse:
20.0 A
Headlight fuse:
15.0 A
Signaling system fuse:
7.5 A
Ignition fuse:
7.5 A
Radiator fan motor fuse:
5.0 A
ABS control unit fuse:
10.0 A (YZF-R125A)
ABS motor fuse:
30.0 A (YZF-R125A)
ABS solenoid fuse:
20.0 A (YZF-R125A)
Backup fuse:
10.0 A
U5D7E6E0.book Page 3 Wednesday, June 17, 2015 10:25 AM

10-1
10
Index
A
ABS (for ABS models) .......................... 3-15
ABS warning light (for ABS models)....... 3-2
Air filter element and check hose,
replacing and cleaning ....................... 6-15
Auxiliary light bulb, replacing ............... 6-36
B
Battery .................................................. 6-32
Brake and clutch levers, checking and
lubricating .......................................... 6-29
Brake fluid, changing ........................... 6-25
Brake fluid level, checking ................... 6-24
Brake lever ........................................... 3-14
Brake light switches ............................. 6-23
Brake pedal .......................................... 3-14
Brake pedal, checking and
lubricating .......................................... 6-29
Brake pedal free play, adjusting........... 6-22
C
Cables, checking and lubricating ......... 6-28
Care ........................................................ 7-1
Catalytic converter ............................... 3-18
Clutch lever .......................................... 3-13
Clutch lever free play, adjusting ........... 6-21
Coolant ................................................. 6-14
Cowlings and panel, removing and
installing ............................................... 6-7
D
Dimmer switch ..................................... 3-11
Drive chain, cleaning and lubricating ... 6-27
Drive chain slack .................................. 6-26
E
Engine break-in ...................................... 5-4
Engine idling speed, checking ............. 6-16
Engine oil and oil filter element ............ 6-11
Engine stop switch ............................... 3-12
Engine trouble warning light................... 3-2
F
Front and rear brake pads, checking ... 6-23
Front brake lever free play, checking ... 6-22
Front fork, checking ............................. 6-31
Fuel....................................................... 3-16
Fuel consumption, tips for reducing ...... 5-4
Fuel level warning light ........................... 3-2
Fuel tank cap........................................ 3-16
Fuses, replacing ................................... 6-34
H
Handlebar switches.............................. 3-11
Headlight bulb, replacing ..................... 6-35
High beam indicator light ....................... 3-2Horn switch........................................... 3-12
I
Identification numbers ............................ 9-1
Ignition circuit cut-off system ............... 3-20
Indicator lights and warning lights .......... 3-2
Info switch ............................................ 3-12
L
License plate light bulb, replacing ........ 6-37
M
Main switch/steering lock ....................... 3-1
Maintenance and lubrication, periodic ... 6-4
Maintenance, emission control
system .................................................. 6-3
Matte color, caution ................................ 7-1
Model label ............................................. 9-1
Multi-function meter unit ........................ 3-4
N
Neutral indicator light.............................. 3-2
P
Parking .................................................... 5-5
Part locations .......................................... 2-1
Pass switch........................................... 3-11
R
Rider seat.............................................. 3-18
S
Safety information................................... 1-1
Shifting .................................................... 5-3
Shift pedal............................................. 3-13
Sidestand .............................................. 3-19
Sidestand, checking and lubricating .... 6-30
Spark plug, checking .............................. 6-9
Specifications ......................................... 8-1
Starting the engine.................................. 5-2
Start switch ........................................... 3-12
Steering, checking ................................ 6-31
Storage ................................................... 7-4
Supporting the motorcycle ................... 6-38
Swingarm pivots, lubricating ................ 6-30
T
Tail/brake light ...................................... 6-36
Throttle grip and cable, checking and
lubricating ........................................... 6-28
Throttle grip free play, adjusting ........... 6-16
Tires ...................................................... 6-18
Tool kit .................................................... 6-2
Troubleshooting .................................... 6-41
Troubleshooting charts ......................... 6-42
Turn signal indicator light ....................... 3-2
Turn signal light bulb, replacing............ 6-37
Turn signal switch ................................. 3-12
U5D7E6E0.book Page 1 Wednesday, June 17, 2015 10:25 AM