Safety information
1-3
1 Carbon Monoxide is a colorless, odor-
less, tasteless gas which may be
present even if you do not see or smell
any engine exhaust. Deadly levels of
carbon monoxide can collect rapidly
and you can quickly be overcome and
unable to save yourself. Also, deadly
levels of carbon monoxide can linger
for hours or days in enclosed or poorly
ventilated areas. If you experience any
symptoms of carbon monoxide poi-
soning, leave the area immediately, get
fresh air, and SEEK MEDICAL TREAT-
MENT.
zDo not run engine indoors. Even if
you try to ventilate engine exhaust
with fans or open windows and
doors, carbon monoxide can rap-
idly reach dangerous levels.
zDo not run engine in poorly venti-
lated or partially enclosed areas
such as barns, garages, or car-
ports.
zDo not run engine outdoors where
engine exhaust can be drawn into
a building through openings such
as windows and doors.
Loading
Adding accessories or cargo to your
vehicle can adversely affect stability
and handling if the weight distribution
of the vehicle is changed. To avoid the
possibility of an accident, use extreme
caution when adding cargo or acces-
sories to your vehicle. Use extra care
when riding a vehicle that has added
cargo or accessories. Here, along with
the information about accessories be-
low, are some general guidelines to fol-
low if loading cargo to your vehicle:The total weight of the operator, pas-
senger, accessories and cargo must
not exceed the maximum load limit.
Operation of an overloaded vehicle
could cause an accident.
When loading within this weight limit,
keep the following in mind:
zCargo and accessory weight
should be kept as low and close to
the vehicle as possible. Securely
pack your heaviest items as close
to the center of the vehicle as pos-
sible and make sure to distribute
the weight as evenly as possible
on both sides of the vehicle to
minimize imbalance or instability.
zShifting weights can create a sud-
den imbalance. Make sure that
accessories and cargo are se-
curely attached to the vehicle be-
fore riding. Check accessory
mounts and cargo restraints fre-
quently.
• Properly adjust the suspension
for your load (suspension-ad-
justable models only), and
check the condition and pres-
sure of your tires.
• Never attach any large or heavy
items to the handlebar, front
fork, or front fender. Such items
can create unstable handling or
a slow steering response.
zThis vehicle is not designed to
pull a trailer or to be attached to
a sidecar.
Maximum load:
167 kg (368 lb)
UBR7E0E0.book Page 3 Tuesday, October 25, 2016 2:44 PM
Safety information
1-4
1Genuine Yamaha Accessories
Choosing accessories for your vehicle
is an important decision. Genuine
Yamaha accessories, which are avail-
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, and
Modifications
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.
zNever 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.
zUse 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.
UBR7E0E0.book Page 4 Tuesday, October 25, 2016 2:44 PM
Periodic maintenance and adjustment
6-17
6
EAU21402
Valve clearance
The valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
EAU69760
Tires
Tires are the only contact between the
vehicle and the road. Safety in all con-
ditions of riding depends on a relatively
small area of road contact. Therefore, it
is essential to maintain the tires in good
condition at all times and replace them
at the appropriate time with the speci-
fied tires.
Tire air pressure
The tire air pressure should be
checked and, if necessary, adjusted
before each ride.
WARNING
EWA10504
Operation of this vehicle with im-
proper tire pressure may cause se-
vere injury or death from loss of
control.
zThe tire air pressure must be
checked and adjusted on cold
tires (i.e., when the temperature
of the tires equals the ambient
temperature).
zThe tire air pressure must be
adjusted in accordance with the
riding speed and with the total
weight of rider, passenger, car-
go, and accessories approved
for this model.
UBR7E0E0.book Page 17 Tuesday, October 25, 2016 2:44 PM
Periodic maintenance and adjustment
6-18
6
WARNING
EWA10512
Never overload your vehicle. Opera-
tion of an overloaded vehicle could
cause an accident.
Tire inspection
The tires must be checked before each
ride. If the center tread depth reaches
the specified limit, if the tire has a nail
or glass fragments in it, or if the side-
wall is cracked, have a Yamaha dealer
replace the tire immediately.
TIP
The tire tread depth limits may differ
from country to country. Always com-
ply with the local regulations.
WARNING
EWA10472
zHave a Yamaha dealer replace
excessively worn tires. Besides
being illegal, operating the vehi-
cle with excessively worn tires
decreases riding stability and
can lead to loss of control.
zThe replacement of all wheel
and brake-related parts, includ-
ing the tires, should be left to a
Yamaha dealer, who has the
necessary professional knowl-
edge and experience to do so.
zRide at moderate speeds after
changing a tire since the tire
surface must first be “broken
in” for it to develop its optimal
characteristics.
Tire information
This model is equipped with tubeless
tires and rubber tire air valves.
Tires age, even if they have not been
used or have only been used occasion-
ally. Cracking of the tread and sidewall
rubber, sometimes accompanied by
carcass deformation, is an evidence of
ageing. Old and aged tires shall be
checked by tire specialists to ascertain
their suitability for further use.
Tire air pressure (measured on cold
tires):
1 person:
Front:
200 kPa (2.00 kgf/cm², 29 psi)
Rear:
225 kPa (2.25 kgf/cm², 33 psi)
2 persons:
Front:
200 kPa (2.00 kgf/cm², 29 psi)
Rear:
225 kPa (2.25 kgf/cm², 33 psi)
Maximum load*:
167 kg (368 lb)
* Total weight of rider, passenger, car-
go and accessories
1. Tire sidewall
2. Tire tread depth
Minimum tire tread depth (front and
rear):
1.6 mm (0.06 in)
UBR7E0E0.book Page 18 Tuesday, October 25, 2016 2:44 PM
Specifications
8-1
8
Dimensions:
Overall length:
1980 mm (78.0 in)
Overall width:
750 mm (29.5 in)
Overall height:
1210 mm (47.6 in)
Seat height:
780 mm (30.7 in)
Wheelbase:
1350 mm (53.1 in)
Ground clearance:
125 mm (4.92 in)
Minimum turning radius:
2.5 m (8.20 ft)
Weight:
Curb weight:
159 kg (351 lb) (MWS125-C)
164 kg (362 lb) (MWS125-A)
Engine:
Combustion cycle:
4-stroke
Cooling system:
Liquid cooled
Valve train:
SOHC
Number of cylinders:
Single cylinder
Displacement:
125 cm³
Bore × stroke:
52.0 × 58.7 mm (2.05 × 2.31 in)
Compression ratio:
11.2 : 1
Starting system:
Electric starter
Lubrication system:
Wet sump
Engine oil:
Recommended brand:
YAMALUBE
SAE viscosity grades:
10W-40
Recommended engine oil grade:
API service SG type or higher, JASO
standard MA or MB
Engine oil quantity:
Oil change:
0.90 L (0.95 US qt, 0.79 Imp.qt)
Final transmission oil:
Type:
Motor oil SAE 10W-30 type SE or higher or
Gear oil SAE 85W GL-3
Quantity:
0.15 L (0.16 US qt, 0.13 Imp.qt)
Coolant quantity:
Coolant reservoir (up to the maximum level
mark):
0.25 L (0.26 US qt, 0.22 Imp.qt)
Radiator (including all routes):
0.46 L (0.49 US qt, 0.40 Imp.qt)
Air filter:
Air filter element:
Oil-coated paper element
Fuel:
Recommended fuel:
Regular unleaded gasoline (Gasohol [E10]
acceptable)
Fuel tank capacity:
7.2 L (1.9 US gal, 1.6 Imp.gal)
Fuel injection:
Throttle body:
ID mark:
BR71 00
Spark plug(s):
Manufacturer/model:
NGK/CPR8EA-9
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
Clutch:
Clutch type:
Dry, centrifugal, shoe
Drivetrain:
Primary reduction ratio:
1.000
Final drive:
Gear
Secondary reduction ratio:
10.208 (56/16 x 35/12)
Transmission type:
V-belt automatic
Chassis:
Frame type:
Underbone
Caster angle:
20.0 °
Trail:
67 mm (2.6 in)
UBR7E0E0.book Page 1 Tuesday, October 25, 2016 2:44 PM
Specifications
8-2
8
Track:
385 mm (15.2 in)
Front tire:
Type:
Tubeless
Size:
90/80-14M/C 43P
Manufacturer/model:
IRC/SCT-003
Rear tire:
Type:
Tubeless
Size:
130/70-13M/C 63P
Manufacturer/model:
IRC/SCT-003
Loading:
Maximum load:
167 kg (368 lb)
(Total weight of rider, passenger, cargo
and accessories)
Tire air pressure (measured on cold
tires):
1 person:
Front:
200 kPa (2.00 kgf/cm², 29 psi)
Rear:
225 kPa (2.25 kgf/cm², 33 psi)
2 persons:
Front:
200 kPa (2.00 kgf/cm², 29 psi)
Rear:
225 kPa (2.25 kgf/cm², 33 psi)
Front wheel:
Wheel type:
Cast wheel
Rim size:
14M/C x MT2.15
Rear wheel:
Wheel type:
Cast wheel
Rim size:
13M/C x MT3.50
Unified brake system:
Operation:
Activated by rear brake
Front brake:
Type:
Hydraulic disc brakeSpecified brake fluid:
DOT 4
Rear brake:
Type:
Hydraulic disc brake
Specified brake fluid:
DOT 4
Front suspension:
Type:
Telescopic fork
Spring:
Coil spring
Shock absorber:
Hydraulic damper
Wheel travel:
90 mm (3.5 in)
Rear suspension:
Type:
Unit swing
Spring:
Coil spring
Shock absorber:
Hydraulic damper
Wheel travel:
90 mm (3.5 in)
Electrical system:
System voltage:
12 V
Ignition system:
TCI
Charging system:
AC magneto
Battery:
Model:
YTZ7V
Voltage, capacity:
12 V, 6.0 Ah (10 HR)
Bulb wattage:
Headlight:
LED
Brake/tail light:
LED
Front turn signal light:
10.0 W
Rear turn signal light:
10.0 W
Auxiliary light:
LED
License plate light:
5.0 W
UBR7E0E0.book Page 2 Tuesday, October 25, 2016 2:44 PM