Yamaha Zuma YW125Y User manual

Read this manual carefully before operating this vehicle.
YW125Y
OWNER’S MANUAL
32S-F8199-10LIT-11626-22-71

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EAU10042
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Q Read this manual carefully before operating this vehicle.This manual should stay with this vehicle if it is sold.

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EAU10050
INTRODUCTION
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Congratulations on your purchase of the Yamaha YW125Y. This model is the result of Yamaha’s vast experience in the
production of fine sporting, touring, and pacesetting racing machines. It represents the high degree of craftsmanship and
reliability that have made Yamaha a leader in these fields.
This manual will give you an understanding of the operation, inspection, and basic maintenance of this scooter. If you have
any questions concerning the operation or maintenance of your scooter, please consult a Yamaha dealer.
The design and manufacture of this Yamaha scooter fully comply with the emissions standards for clean air applicable at the
date of manufacture. Yamaha has met these standards without reducing the performance or economy of operation of the
scooter. To maintain these high standards, it is important that you and your Yamaha dealer pay close attention to the
recommended maintenance schedules and operating instructions contained within this manual.
Yamaha continually seeks advancements in product design and quality. Therefore, while this manual contains the most
current product information available at the time of printing, there may be minor discrepancies between your scooter and
this manual. If there is any question concerning this manual, please consult a Yamaha dealer.
EWA12581
WARNING
Please read this manual and the “YOU AND YOUR MOTORCYCLE: RIDING TIPS” booklet carefully and completely
before operating this scooter. Do not attempt to operate this scooter until you have attained adequate knowledge
of its controls and operating features and until you have been trained in safe and proper riding techniques. Regu-
lar inspections and careful maintenance, along with good riding skills, will ensure that you safely enjoy the capa-
bilities and reliability of this scooter.

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IMPORTANT MANUAL INFORMATION
Q
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Particularly important information is distinguished in this manual by the following notations:
This is the safety alert symbol. It is used to alert you to potential personal injury
hazards. Obey all safety messages that follow this symbol to avoid possible injury
or death.
A WARNING indicates a hazardous situation which, if not avoided, could result in
death or serious injury.
A NOTICE indicates special precautions that must be taken to avoid damage to the
vehicle or other property.
A TIP provides key information to make procedures easier or clearer.
WARNING
NOTICE
TIP

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EAU10122
IMPORTANT MANUAL INFORMATION
EAUT2191
YW125Y
OWNER’S MANUAL
©2008 byYamaha Motor Corporation, U.S.A.
1st edition, July 2008
All rights reserved.
Any reprinting or unauthorized use without
the written permission ofYamaha
Motor Corporation, U.S.A. is expressly
prohibited.
Printed in Taiwan.
P/N LIT-11626-22-71

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EAU10210
TABLE OF CONTENTS
LOCATION OF IMPORTANT
LABELS .............................................. 1-1
SAFETY INFORMATION .................... 1-3
Further safe-riding points ................ 1-7
DESCRIPTION ................................... 2-1
Left view .......................................... 2-1
Right view ........................................ 2-2
Controls and instruments ................ 2-3
INSTRUMENT AND CONTROL FUNC-
TIONS ................................................. 3-1
Main switch/steering lock ................ 3-1
Keyhole cover ................................. 3-2
Indicator lights ................................. 3-2
Speedometer unit ............................ 3-3
Fuel gauge ...................................... 3-3
Handlebar switches ........................ 3-4
Front brake lever ............................. 3-5
Rear brake lever ............................. 3-5
Fuel tank cap ................................... 3-5
Fuel ................................................. 3-6
Catalytic converter .......................... 3-7
Seat ................................................. 3-8
Helmet holder .................................. 3-9
Storage compartment ...................... 3-9
Sidestand ......................................3-10
Ignition circuit cut-off system .........3-11
FORYOUR SAFETY - PRE-OPERATION
CHECKS ............................................ 4-1
Pre-operation check list .................. 4-2
OPERATION AND IMPORTANT RIDING
POINTS ............................................... 5-1
Starting the engine .......................... 5-1
Starting off ....................................... 5-2
Acceleration and deceleration ........ 5-2
Braking ............................................ 5-2
Tips for reducing fuel consumption . 5-3
Engine break-in ............................... 5-3
Parking ............................................ 5-4
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 panels ..... 6-8
Checking the spark plug ................. 6-9
Engine oil ......................................6-10
Final transmission oil ....................6-12
Air filter and V-belt case air filter
elements ....................................6-13
Checking the engine idling
speed .........................................6-15
Checking the throttle cable free
play ............................................6-15
Valve clearance ............................. 6-15
Tires ...............................................6-16
Cast wheels ................................... 6-17
Checking the front brake lever free
play ............................................6-18
Adjusting the rear brake lever free
play ............................................6-18
Checking the front brake pads and rear
brake shoes ...............................6-19
Checking the brake fluid level ......6-20
Changing the brake fluid ..............6-21
Checking and lubricating the
cables ........................................6-21
Checking and lubricating the throttle
grip and cable ............................ 6-22
Lubricating the front and rear brake
levers .........................................6-22
Checking and lubricating the
centerstand and sidestand ........6-22
Checking the front fork ..................6-23
Checking the steering ................... 6-24
Checking the wheel bearings ....... 6-24
Battery ...........................................6-25
Replacing the fuses ......................6-26
Replacing a headlight bulb ........... 6-27
Tail/brake light ...............................6-28
Replacing a turn signal light bulb . 6-28
Troubleshooting ............................6-29
Troubleshooting chart ...................6-30

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EAU10210
TABLE OF CONTENTS
SCOOTER CARE AND STORAGE .... 7-1
Matte color caution .......................... 7-1
Care................................................. 7-1
Storage ............................................ 7-3
SPECIFICATIONS .............................. 8-1
CONSUMER INFORMATION ............. 9-1
Identification numbers ..................... 9-1
Reporting safety defects ................. 9-3
Motorcycle noise regulation ............ 9-4
Maintenance record ........................ 9-5
YAMAHA MOTOR CORPORATION,
U.S.A. RIVA LIMITED
WARRANTY ................................. 9-7
YAMAHA EXTENDED SERVICE
(Y.E.S.) .......................................... 9-9

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EAU45762
LOCATION OF IMPORTANT LABELS
1-1
Labels, location<IXE>
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Read and understand all of the labels on your vehicle. They contain important information for safe and proper operation of
your vehicle. Never remove any labels from your vehicle. If a label becomes difficult to read or comes off, a replacement
label is available from your Yamaha dealer.
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LOCATION OF IMPORTANT LABELS
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EAU45762
LOCATION OF IMPORTANT LABELS
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175kpa, {1.75kgf/cm
2
},25psi
200kpa, {2.00kgf/cm
2
},29psi
225kpa, {2.25kgf/cm
2
},33psi
200kpa, {2.00kgf/cm
2
},29psi
24P-F1668-00
4JK-F8446-01

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Safety information<IXE>
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Be a Responsible Owner
As the vehicle’s owner, you are respon-
sible for the safe and proper operation
of your scooter.
Scooters are single-track vehicles.
Their safe use and operation are depen-
dent upon the use of proper riding tech-
niques as well as the expertise of the
operator.Every operator should know the
following requirements before riding this
scooter.
He or she should:
●Obtain thorough instructions from
a competent source on all aspects
of scooter operation.
●Observe the warnings and mainte-
nance requirements in this Owner’s
Manual.
●Obtain qualified training in safe and
proper riding techniques.
●Obtain professional technical ser-
vice as indicated in this Owner’s
Manual and/or when made neces-
sary by mechanical conditions.
Safe Riding
Perform the pre-operation checks each
time you use the vehicle to make sure
it is in safe operating condition. Failure
to inspect or maintain the vehicle prop-
erly increases the possibility of an acci-
dent or equipment damage. See page
4-2 for a list of pre-operation checks.
●This scooter is designed to carry
the operator and a passenger.
●The failure of motorists to detect
and recognize scooters in traffic is
the predominating cause of auto-
mobile/scooter accidents. Many
accidents have been caused by an
automobile driver who did not see
the scooter. Making yourself con-
spicuous appears to be very effec-
tive in reducing the chance of this
type of accident.
Therefore:
• Wear a brightly colored jacket.
• Use extra caution when you are
approaching and passing
through intersections, since
intersections are the most
likely places for scooter
accidents to occur.
• Ride where other motorists can
see you. Avoid riding in another
motorist’s blind spot.
●Many accidents involve inexperi-
enced operators. In fact, many op-
erators who have been involved in
accidents do not even have a cur-
rent driver’s license.
• Make sure that you are quali-
fied and that you only lend your
scooter to other qualified
operators.
• Know your skills and limits.
Staying within your limits may
help you to avoid an accident.
• We recommend that you
practice riding your scooter
where there is no traffic until
you have become thoroughly
familiar with the scooter and all
of its controls.
●Many accidents have been caused
by error of the scooter operator. A
typical error made by the operator
is veering wide on a turn due to

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excessive speed or undercornering
(insufficient lean angle for the
speed).
• Always obey the speed limit
and never travel faster than
warranted by road and traffic
conditions.
• Always signal before turning or
changing lanes. Make sure that
other motorists can see you.
●The posture of the operator and
passenger is important for proper
control.
• The operator should keep both
hands on the handlebar and
both feet on the operator
footrests during operation to
maintain control of the scooter.
• The passenger should always
hold onto the operator, the seat
strap or grab bar, if equipped,
with both hands and keep both
feet on the passenger footrests.
Never carry a passenger unless
he or she can firmly place both
feet on the passenger foot-
rests.
●Never ride under the influence of
alcohol or other drugs.
●This scooter is designed for on-road
use only. It is not suitable for off-
road use.
Protective apparel
The majority of fatalities from scooter
accidents are the result of head injuries.
The use of a safety helmet is the single
most critical factor in the prevention or
reduction of head injuries.
●Always wear an approved helmet.
●Wear a face shield or goggles.Wind
in your unprotected eyes could con-
tribute to an impairment of vision
that could delay seeing a hazard.
●The use of a jacket, substantial
shoes, trousers, gloves, etc., is
effective in preventing or reducing
abrasions or lacerations.
●Never wear loose-fitting clothes,
otherwise they could catch on the
control levers or wheels and cause
injury or an accident.
●Always wear protective clothing
that covers your legs, ankles, and
feet.The engine or exhaust system
become very hot during or after
operation and can cause burns.
●A passenger should also observe
the above precautions.
Avoid Carbon Monoxide Poisoning
All engine exhaust contains carbon
monoxide, a deadly gas. Breathing car-
bon monoxide can cause headaches,
dizziness, drowsiness, nausea, confu-
sion, and eventually death.
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 un-
able to save yourself. Also, deadly lev-
els of carbon monoxide can linger for
hours or days in enclosed or poorly ven-
tilated areas. If you experience any
symptoms of carbon monoxide poison-
ing, leave the area immediately, get
fresh air, and SEEK MEDICAL TREAT-
MENT.
●Do not run engine indoors. Even if

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you try to ventilate engine exhaust
with fans or open windows and
doors, carbon monoxide can rap-
idly reach dangerous levels.
●Do not run engine in poorly venti-
lated or partially enclosed areas
such as barns, garages, or car-
ports.
●Do 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
scooter can adversely affect stability
and handling if the weight distribution of
the scooter is changed. To avoid the
possibility of an accident, use extreme
caution when adding cargo or accesso-
ries to your scooter.Use extra care when
riding a scooter that has added cargo or
accessories. Here, along with the infor-
mation about accessories below, are
some general guidelines to follow if load-
ing cargo to your scooter:
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.
Maximum load:
155 kg (342 lb)
When loading within this weight limit,
keep the following in mind:
●Cargo and accessory weight should
be kept as low and close to the
scooter as possible. Securely pack
your heaviest items as close to the
center of the vehicle as possible
and make sure to distribute the
weight as evenly as possible on
both sides of the scooter to mini-
mize imbalance or instability.
●Shifting weights can create a sud-
den imbalance. Make sure that ac-
cessories and cargo are securely
attached to the scooter before riding.
Check accessory mounts and
cargo restraints frequently.
• Properly adjust the suspension
for your load (suspension-
adjustable models only), and
check the condition and
pressure 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.
This vehicle is not designed to
pull a trailer or to be attached to
a sidecar.
GenuineYamaha 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 acces-
sories or offer other modifications for
Yamaha vehicles. Yamaha is not in a
position to test the products that these

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aftermarket companies produce.There-
fore, Yamaha can neither endorse nor
recommend the use of accessories not
sold by Yamaha or modifications not
specifically recommended by Yamaha,
even if sold and installed by a Yamaha
dealer.
Aftermarket Parts, Accessories, and
Modifications
While you may find aftermarket products
similar in design and quality to genuine
Yamaha accessories, recognize that
some aftermarket accessories or modi-
fications are not suitable because of
potential safety hazards to you or oth-
ers. Installing aftermarket products or
having other modifications performed to
your vehicle that change any of the
vehicle’s design or operation character-
istics 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 perfor-
mance of your scooter. Carefully
inspect the accessory before us-
ing it to make sure that it does not
in any way reduce ground clear-
ance or cornering clearance, limit
suspension travel, steering travel
or control operation, or obscure
lights or reflectors.
• Accessories fitted to the
handlebar or the front fork area
can create instability due to
improper weight distribution or
aerodynamic 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 scooter due to aerodynamic
effects. Wind may attempt to
lift the scooter, or the scooter
may become unstable in cross
winds. These accessories may
also cause instability when
passing or being passed by
large vehicles.
• Certain accessories can
displace 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
accessories are not recom-
mended.
●Use caution when adding electrical
accessories. If electrical accesso-
ries exceed the capacity of the
scooter’s electrical system, an elec-
tric failure could result, which could
cause a dangerous loss of lights or
engine power.
AftermarketTires and Rims
The tires and rims that came with your
scooter were designed to match the
performance capabilities and to provide
the best combination of handling, brak-
ing, and comfort. Other tires, rims, sizes,
and combinations may not be appropri-

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EAUT2030
Further safe-riding points
●Make sure to signal clearly when
making turns.
●Braking can be extremely difficult
on a wet road. Avoid hard braking,
because the scooter could slide.
Apply the brakes slowly when stop-
ping on a wet surface.
●Slow down as you approach a cor-
ner or turn. Once you have com-
pleted a turn, accelerate slowly.
●Be careful when passing parked
cars. A driver might not see you and
open a door in your path.
●Railroad crossings, streetcar rails,
iron plates on road construction
sites, and manhole covers become
extremely slippery when wet. Slow
down and cross them with caution.
Keep the scooter upright, otherwise
it could slide out from under you.
●The brake lining could get wet when
you wash the scooter. After wash-
ing the scooter, check the brakes
before riding.
●Always wear a helmet, gloves, trou-
sers (tapered around the cuff and
ankle so they do not flap), and a
bright colored jacket.
●Do not carry too much luggage on
the scooter. An overloaded scooter
is unstable.
1-7
Safe-riding points<IXE>
ate. Refer to page 6-16 for tire specifi-
cations and more information on replac-
ing your tires.

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EAU10401
DESCRIPTION EAU10401 DESCRIPTION
2-1
EAU10410
Left view
1. Front turn signal light (page 6-28)
2. Battery (page 6-25)
3. Helmet holder (page 3-9)
4. Sidestand (page 3-10)
5. V-belt case air filter cover (page 6-13)
6. Centerstand (page 6-22)
7. Air filter (page 6-13)
8. Rear turn signal light (page 6-28)
Part locations<IXE>
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DESCRIPTION
2-2
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Right view
1. Tail/brake light (page 6-28)
2. Muffler (page 3-7)
3. Storage compartment (page 3-9)
4. Seat (page 3-8)
5. Fuel tank cap (page 3-5)
6. Spark plug (page 6-9)
7. Headlight (page 6-27)
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DESCRIPTION
2-3
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Controls and instruments
1. Rear brake lever (page 6-18)
2. Left handlebar switches (page 3-4)
3. Speedometer unit (page 3-3)
4. Fuel gauge (page 3-3)
5. Brake fluid reservoir (page 6-20)
6. Right handlebar switches (page 3-4)
7. Front brake lever (page 6-18)
8. Throttle grip (page 5-2)
9. Main switch/steering lock (page 3-1)
12 34
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INSTRUMENT AND CONTROL FUNCTIONS
3-1
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INSTRUMENT AND CONTROL FUNCTIONS
Main switch/steering lock<IXE>
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OFF
All electrical systems are off. The key
can be removed.
EWA10061
WARNING
Never turn the key to “OFF” or
“LOCK” while the vehicle is moving.
Otherwise the electrical systems will
be switched off, which may result in
loss of control or an accident.
EAU45440
Main switch/steering lock
PUSHPUSH
The main switch/steering lock controls
the ignition and lighting systems, and is
used to lock the steering. The various
positions are described below.
TIP
The main switch/steering lock is
equipped with a keyhole cover. (See page
3-2.)
EAUT2270
ON
All electrical circuits are supplied with
power, and the meter lighting and tail-
light come on, and the engine can be
started. The key cannot be removed.
TIP
The headlight comes on automatically
when the engine is started and stays
on until the key is turned to “OFF”.
EAU10681
LOCK
The steering is locked, and all electrical
systems are off. The key can be re-
moved.
To lock the steering
1
PUSHPUSH
1. Push.
1. Turn the handlebars all the way to
the left.
2. Push the key in from the “OFF” po-
sition, and then turn it to “LOCK”
while still pushing it.
3. Remove the key.

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INSTRUMENT AND CONTROL FUNCTIONS
Keyhole cover<IXE>
Indicator lights<IXE>
Turn signal indicator light<IXE>
High beam indicator light<IXE>
EAU10980
Indicator lights
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3
1. Turn signal indicator light “4 6”
2. High beam indicator light“&”
3. Engine trouble warning light “ ”
EAU11020
Turn signal indicator light “44
44
466
66
6”
This indicator light flashes when the turn
signal switch is pushed to the left or right.
EAU11080
High beam indicator light “&&
&&
&”
This indicator light comes on when the
high beam of the headlight is switched
on.
To unlock the steering
12
1. Turn.
2. Release.
Push the key in, and then turn it to “OFF”
while still pushing it.
EAUT2111
Keyhole cover
PUSHPUSH
1
1. Keyhole cover lever
To open the keyhole cover
Insert the key bow into the keyhole cover
receptacle as shown, and then turn the
key to the right to open the cover.
To close the keyhole cover
Push the keyhole cover lever inward and
the keyhole cover will close.
3-2