Table of contentsSafety information ............................ 1-1
Further safe-riding points ............... 1-5
Description ....................................... 2-1
Left view ......................................... 2-1
Right view ....................................... 2-2
Controls and instruments ............... 2-3
Instrument an d control functions ... 3-1
Main switch/steering lock............... 3-1
Keyhole shutter .............................. 3-3
Indicator lights and warning lights............................................ 3-3
Self-diagnosis device .................... 3-5
Multi-function meter unit ................ 3-5
Handlebar switches ........................ 3-9
Front brake lever .......................... 3-10
Rear brake lever ........................... 3-10
ABS (for ABS models) .................. 3-11
Fuel tank cap ................................ 3-12
Fuel ............................................... 3-13
Catalytic converter ....................... 3-14
Seat .............................................. 3-15
Passenger footrest ....................... 3-15
Storage compartment .................. 3-16
Luggage hook............................... 3-17
Sidestand ..................................... 3-17
Ignition circuit cut-off system ....... 3-18
Auxiliary DC connector ................. 3-20 For your safety – pre-operation
checks
............................................... 4-1
Operation an d important ri din g
points ................................................. 5-1
Starting the engine .......................... 5-1
Starting off ...................................... 5-2
Acceleration and deceleration ........ 5-3
Braking ............................................ 5-3
Tips for reducing fuel consumption ................................ 5-3
Engine break-in ............................... 5-4
Parking ............................................ 5-4
Perio dic maintenance an d
a d justment ........................................ 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 panel ............................................ 6-8
Checking the spark plug ................. 6-8
Engine oil and oil strainer .............. 6-10
Final transmission oil..................... 6-12
Coolant.......................................... 6-13
Air filter and V-belt case air filter elements .................................... 6-14
Checking the throttle grip free play ..................................... 6-16 Valve clearance............................. 6-16
Tires .............................................. 6-17
Cast wheels .................................. 6-18
Checking the front brake lever
free play..................................... 6-19
Checking the rear brake lever free play..................................... 6-19
Checking the front and rear
brake pads ................................ 6-20
Checking the brake fluid level ...... 6-20
Changing the brake fluid .............. 6-22
Checking and lubricating the cables ........................................ 6-22
Checking and lubricating the
throttle grip and cable ............... 6-22
Lubricating the front and rear brake levers ............................... 6-23
Checking and lubricating the centerstand and sidestand........ 6-23
Checking the front fork ................. 6-24
Checking the steering................... 6-25
Checking the wheel bearings ....... 6-25
Checking the steering tie rod ....... 6-25
Checking the leaning system ....... 6-26
Battery .......................................... 6-26
Replacing the fuses ...................... 6-27
Replacing the headlight bulb ........ 6-29
Auxiliary lights............................... 6-30
Tail/brake light .............................. 6-30
Turn signal light bulb .................... 6-31
Troubleshooting............................ 6-31U2CME2E0.book Page 1 Friday, August 21, 2015 9:16 AM
Safety information
1-4
1
able only from a Yamaha dealer, have
been designed, tested, and approved
by Yamaha for use on your vehicle.
Many companies with no connection
to Yamaha manufacture parts and ac-
cessories or offer other modifications
for Yamaha vehicles. Yamaha is not in
a position to test the products that
these aftermarket companies produce.
Therefore, Yamaha can neither en-
dorse nor recommend the use of ac-
cessories not sold by Yamaha or
modifications not specifically recom-
mended by Yamaha, even if sold and
installed by a Yamaha dealer.
Aftermarket Parts, Accessories, an
d
Mo difications
While you may find aftermarket prod-
ucts similar in design and quality to
genuine Yamaha accessories, recog-
nize that some aftermarket accesso-
ries or modifications are not suitable
because of potential safety hazards to
you or others. Installing aftermarket
products or having other modifications
performed to your vehicle that change
any of the vehicle’s design or operation
characteristics can put you and others at greater risk of serious injury or
death. You are responsible for injuries
related to changes in the vehicle.
Keep the following guidelines in mind,
as well as those provided under “Load-
ing” when mounting accessories.
Never install accessories or carry
cargo that would impair the per-
formance of your vehicle. Careful-
ly inspect the accessory before
using it to make sure that it does
not in any way reduce ground
clearance or cornering clearance,
limit suspension travel, steering
travel or control operation, or ob-
scure lights or reflectors.
• Accessories fitted to the han- dlebar or the front fork area can
create instability due to improp-
er weight distribution or aerody-
namic changes. If accessories
are added to the handlebar or
front fork area, they must be as
lightweight as possible and
should be kept to a minimum.
• Bulky or large accessories may seriously affect the stability of
the vehicle due to aerodynamic
effects. Wind may attempt to lift the vehicle, or the vehicle may
become unstable in cross
winds. These accessories may
also cause instability when
passing or being passed by
large vehicles.
• Certain accessories can dis- place the operator from his or
her normal riding position. This
improper position limits the
freedom of movement of the
operator and may limit control
ability, therefore, such accesso-
ries are not recommended.
Use caution when adding electri-
cal accessories. If electrical ac-
cessories exceed the capacity of
the vehicle’s electrical system, an
electric failure could result, which
could cause a dangerous loss of
lights or engine power.
Aftermarket Tires an d Rims
The tires and rims that came with your
vehicle were designed to match the
performance capabilities and to pro-
vide the best combination of handling,
braking, and comfort. Other tires, rims,
sizes, and combinations may not be
U2CME2E0.book Page 4 Friday, August 21, 2015 9:16 AM
Instrument and control functions
3-1
3
EAUN0264
Main switch/steerin g lockMW125
MW125A
The main switch/steering lock controls
the ignition and lighting systems, and is
used to lock the steering. The various
main switch positions are described
below.
TIPThe main switch/steering lock is
equipped with a keyhole shutter. (See
page 3-3 for keyhole shutter opening
and closing procedures.)
EAUT1972
ON
All electrical circuits are supplied with
power; the meter lighting, taillight, and
auxiliary lights come on, and the en-
gine can be started. The key cannot be
removed.TIPThe headlight comes on automatically
when the engine is started and stays
on until the key is turned to “OFF” or
the sidestand is moved down.
EAU10662
OFF
All electrical systems are off. The key
can be removed.
WARNING
EWA10062
Never turn the key to “OFF” or
“LOCK” while the vehicle is movin g.
Otherwise the electrical systems will
b e switche d off, which may result in
loss of control or an acci dent.
EAU10687
LOCK
The steering is locked and all electrical
systems are off. The key can be re-
moved.
To lock the steeringMW125
LOCK
OFF
ON
LOCK OFF
ON
1. Push.
2. Turn.12
U2CME2E0.book Page 1 Friday, August 21, 2015 9:16 AM
Instrument and control functions
3-3
3
EAUN0353
Keyhole shutterMW125
MW125A To open the keyhole shutter
Insert the key head into the keyhole
shutter receptacle as shown, and then
turn the key to the right to open the
keyhole shutter.
To close the keyhole shutterPress the “PUSH SHUT” button to
close the keyhole shutter.
EAU49398
In
dicator li ghts an d warnin g
lig hts
EAU11032
Turn si gnal in dicator li ghts “ ”
an d“”
Each indicator light will flash when its
corresponding turn signal lights are
flashing.
1. “PUSH SHUT” button
2. Key head
1. “PUSH SHUT” button
2. Key head
1
2
1
2
1. Left turn signal indicator light “ ”
2. Anti-lock Brake System (ABS) warning light “ ” (for ABS models)
3. Coolant temperature warning light “ ”
4. High beam indicator light “ ”
5. Engine trouble warning light “ ”
6. Right turn signal indicator light “ ”
1
2
3
4
5
6
ABS
U2CME2E0.book Page 3 Friday, August 21, 2015 9:16 AM
Instrument and control functions
3-10
3
EAU12401
Dimmer switch “ / ”
Set this switch to “ ” for the high
beam and to “ ” for the low beam.
EAU12461
Turn si gnal 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 cen-
ter position. To cancel the turn signal
lights, push the switch in after it has re-
turned to the center position.
EAU12501
Horn switch “ ”
Press this switch to sound the horn.
EAU12722
Start switch “ ”
With the sidestand up, push this switch
while applying the front or rear brake to
crank the engine with the starter. See
page 5-1 for starting instructions prior
to starting the engine.
EAU12902
Front brake leverThe front brake lever is located on the
right side of the handlebar. To apply
the front brake, pull this lever toward
the throttle grip.
EAUS1963
Rear brake leverThe rear brake lever is located on the
left handlebar grip. To apply the rear
brake, pull the lever toward the handle-
bar grip.
This model is equipped with a unified
brake system.
When pulling the rear brake lever, the
rear brake and a portion of the front
brake are applied. For full braking per-
formance, apply both brake levers si-
multaneously.
1. Front brake lever
1
1. Rear brake lever
1
U2CME2E0.book Page 10 Friday, August 21, 2015 9:16 AM
Instrument and control functions
3-13
3
EAU13222
FuelMake sure there is sufficient gasoline in
the tank.
WARNING
EWA10882
Gasoline an d gasoline vapors are
extremely flammab le. To avoid fires
an d explosions an d to re duce the
risk of injury when refueling , follow
these instructions.1. Before refueling, turn off the en- gine and be sure that no one is sit-
ting on the vehicle. Never refuel
while smoking, or while in the vi-
cinity of sparks, open flames, or
other sources of ignition such as
the pilot lights of water heaters
and clothes dryers.
2. Do not overfill the fuel tank. When refueling, be sure to insert the
pump nozzle into the fuel tank filler
hole. Stop filling when the fuel
reaches the bottom of the filler
tube. Because fuel expands when
it heats up, heat from the engine or
the sun can cause fuel to spill out
of the fuel tank. 3. Wipe up any spilled fuel immedi-
ately. NOTICE: Immediately
wipe off spille d fuel with a clean,
d ry, soft cloth, since fuel may
d eteriorate painte d surfaces or
plastic parts.
[ECA10072]
4. Be sure to securely close the fuel tank cap.
WARNING
EWA15152
Gasoline is poisonous an d can
cause injury or d eath. Handle gaso-
line with care. Never siphon gasoline
b y mouth. If you shoul d swallow
some gasoline or inhale a lot of gas-
oline vapor, or g et some gasoline in
your eyes, see your doctor imme di- ately. If g
asoline spills on your skin,
wash with soap an d water. If gaso-
line spills on your clothin g, chan ge
your clothes.
EAU53013
NOTICE
ECA11401
Use only unlea ded g asoline. The use
of lead ed g asoline will cause severe
d amag e to internal en gine parts,
such as the valves an d piston rin gs,
as well as to the exhaust system.Your Yamaha engine has been de-
signed to use regular unleaded gaso-
line with a research octane number of
95 or higher. If knocking (or pinging)
occurs, use a gasoline of a different
brand or premium unleaded fuel. Use
of unleaded fuel will extend spark plug
life and reduce maintenance costs.
1. Fuel tank filler tube
2. Maximum fuel level
1
2
Recommen ded fuel:
Regular unleaded gasoline (Gasohol
(E10) acceptable)
Fuel tank capacity:
6.6 L (1.74 US gal, 1.45 Imp.gal)
U2CME2E0.book Page 13 Friday, August 21, 2015 9:16 AM
Operation and important ri din g points
5-1
5
EAU15952
Read the Owner’s Manual carefully to
become familiar with all controls. If
there is a control or function you do not
understand, ask your Yamaha dealer.
WARNING
EWA10272
Failure to familiarize yourself with
the controls can lead to loss of con-
trol, which coul d cause an acci dent
or injury.
EAU45311
TIPThis model is equipped with a lean an-
gle sensor to stop the engine in case of
a turnover. To start the engine after a
turnover, be sure to turn the main
switch to “OFF” and then to “ON”. Fail-
ing to do so will prevent the engine
from starting even though the engine
will crank when pushing the start
switch.
EAUU1950
Startin g the en gineNOTICE
ECA10251
See pag e 5-4 for en gine break-in in-
structions prior to operatin g the ve-
hicle for the first time.In order for the ignition circuit cut-off
system to enable starting, the side-
stand must be up.
See page 3-18 for more information. 1. Turn the key to “ON”. The following warning lights
should come on for a few sec-
onds, then go off. Engine trouble warning light
Coolant temperature warning
lightNOTICE
ECA15485
If a warnin g li ght does not come on
initially when the key is turne d to
“ON”, or if a warnin g lig ht remains
on, see pa ge 3-3 for the correspon d-
in g warnin g lig ht circuit check.
U2CME2E0.book Page 1 Friday, August 21, 2015 9:16 AM
Operation and important ri din g points
5-3
5
EAU16782
Acceleration an d d ecelerationThe speed can be adjusted by opening
and closing the throttle. To increase
the speed, turn the throttle grip in di-
rection (a). To reduce the speed, turn
the throttle grip in direction (b).
EAU60650
Brakin g
WARNING
EWA17790
Avoi d b rakin g har d or su ddenly
(especially when leanin g over to
one si de), otherwise the vehicle
may ski d or overturn.
Railroa d crossin gs, streetcar
rails, iron plates on roa d con-
struction sites, an d manhole
covers become extremely slip-
pery when wet. Therefore, slow
d own when approachin g such
areas an d cross them with cau-
tion.
Keep in min d that b raking on a
wet roa d is much more difficult.
Ride slowly down a hill, as b rak-
in g d ownhill can be very d iffi-
cult.1. Close the throttle completely.
2. Apply both front and rear brakes simultaneously while gradually in-
creasing the pressure.
EAU16821
Tips for re ducin g fuel con-
sumptionFuel consumption depends largely on
your riding style. Consider the follow-
ing tips to reduce fuel consumption:
Avoid high engine speeds during
acceleration.
Avoid high engine speeds with no
load on the engine.
Turn the engine off instead of let-
ting it idle for an extended length
of time (e.g., in traffic jams, at traf-
fic lights or at railroad crossings).
(b)
(a)
ZAUM0199
U2CME2E0.book Page 3 Friday, August 21, 2015 9:16 AM