Yamaha YW50AS User Manual
LIT-11626-17-36
5PJ-F8199-12
q WARNING
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth defects
or other reproductive harm.
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INTRODUCTION
Congratulations on your purchase of the Yamaha YW50AS. 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.
IMPORTANT MANUAL INFORMATION
Particularly important information is distinguished in this manual by the following notations:
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NOTE:
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS
INVOLVED!
Failure to follow WARNING instructions could result in severe injury or death to the scooter
operator, a bystander or a person inspecting or repairing the scooter.
A CAUTION indicates special precautions that must be taken to avoid damage to the
scooter.
A NOTE provides key information to make procedures easier or clearer.
NOTE:
9 This manual should be considered a permanent part of this scooter and should re-
main with it even if the scooter is subsequently sold.
9 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 you have any questions concerning this manual, please consult your Yamaha dealer.
IMPORTANT MANUAL INFORMATION
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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. REGULAR INSPECTIONS AND CAREFUL MAINTENANCE, ALONG
WITH GOOD RIDING SKILLS, WILL ENSURE THAT YOU SAFELY ENJOY THE CAPABILITIES AND
THE RELIABILITY OF THIS SCOOTER.
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AFFIX DEALER
LABEL HERE
YW50AS
OWNER’S MANUAL
©2003 by Yamaha Motor Corporation, U.S.A.
1st edition, June 2003
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Corporation, U.S.A.
is expressly prohibited.
Printed in Taiwan.
P/N LIT-11626-17-36
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TABLE OF CONTENTS
SAFETY INFORMATION ................................... 1-1
1
2
3
Safe riding .....................................................1-1
Protective apparel ......................................... 1-2
Modifications .................................................1-3
Loading and accessories .............................. 1-3
Gasoline and exhaust gas ............................ 1-5
Further safe-riding points .............................1-6
Location of important labels ........................ 1-7
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 and warning lights ........................ 3-2
Speedometer unit.......................................... 3-3
Fuel gauge ..................................................... 3-4
Handlebar switches .......................................3-4
Front brake lever ........................................... 3-5
Rear brake lever ............................................3-5
Fuel and 2-stroke engine oil tank caps ........3-6
Fuel .................................................................3-6
2-stroke engine oil .........................................3-7
Kickstarter ......................................................3-8
Seat ................................................................3-8
Helmet holder ................................................3-9
Storage compartment ................................... 3-9
Front storage compartment ....................... 3-10
Carrier ..........................................................3-11
PRE-OPERATION CHECKS ............................... 4-1
4
5
6
Pre-operation check list ................................ 4-1
OPERATION AND IMPORTANT RIDING
POINTS .............................................................. 5-1
Starting and warming up a cold engine ...... 5-1
Starting off .....................................................5-2
Acceleration and deceleration...................... 5-3
Braking ...........................................................5-3
Engine break-in .............................................5-4
Parking ........................................................... 5-5
PERIODIC MAINTENANCE AND MINOR
REPAIR .............................................................. 6-1
Owner’s tool kit ............................................. 6-1
Periodic maintenance and lubrication chart ..... 6-2
Removing and installing the panel ..............6-5
Checking the spark plug ............................... 6-5
Final transmission oil .................................... 6-7
Cleaning the air filter element ...................... 6-8
TABLE OF CONTENTS
Adjusting the carburetor............................. 6-10
Adjusting the throttle cable free play ........6-10
Tires ..............................................................6-11
Checking the brake lever free play............. 6-13
Adjusting the brake lever free play ............ 6-13
Checking the front brake pads and rear
brake shoes ...............................................6-14
Checking the brake fluid level ....................6-15
Changing the brake fluid ............................ 6-16
Checking and lubricating the cables .......... 6-16
Checking and lubricating the throttle grip
and cable ...................................................6-17
Adjusting the Autolube pump .................... 6-17
Lubricating the front and rear brake levers ..... 6-17
Checking and lubricating the centerstand ......6-18
Checking the front fork ............................... 6-18
Checking the steering ................................. 6-19
Checking the wheel bearings .....................6-20
Battery ..........................................................6-20
Replacing the fuse ....................................... 6-22
Troubleshooting .......................................... 6-22
Troubleshooting chart ................................ 6-23
SCOOTER CARE AND STORAGE ....................7-1
7
8
9
Care ................................................................ 7-1
Storage ........................................................... 7-4
SPECIFICATIONS .............................................. 8-1
CONSUMER INFORMATION ........................... 9-1
Identification numbers .................................. 9-1
Key identification number ............................9-1
Vehicle identification number ......................9-1
Model label ....................................................9-2
Reporting safety defects ...............................9-3
SCOOTER NOISE REGULATION ..................9-4
YAMAHA MOTOR CORPORATION, U.S.A.
RIVA LIMITED WARRANTY ....................... 9-6
YAMAHA EXTENDED SERVICE (Y.E.S.) ......9-8
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Q SAFETY INFORMATION
SCOOTERS ARE SINGLE TRACK VEHICLES. THEIR SAFE USE AND OPERATION ARE DEPENDENT UPON THE USE OF PROPER RIDING TECHNIQUES AS WELL AS THE EXPERTISE OF THE
OPERATOR. EVERY OPERATOR SHOULD KNOW THE FOLLOWING REQUIREMENTS BEFORE
RIDING THIS SCOOTER.
HE OR SHE SHOULD:
1. OBTAIN THOROUGH INSTRUCTIONS FROM A COMPETENT SOURCE ON ALL ASPECTS
OF SCOOTER OPERATION.
2. OBSERVE THE WARNINGS AND MAINTENANCE REQUIREMENTS IN THE OWNER’S
MANUAL.
3. OBTAIN QUALIFIED TRAINING IN SAFE AND PROPER RIDING TECHNIQUES.
4. OBTAIN PROFESSIONAL TECHNICAL SERVICE AS INDICATED BY THE OWNER’S MANUAL
AND/OR WHEN MADE NECESSARY BY MECHANICAL CONDITIONS.
Safe riding
1. Always make pre-operation checks. Careful checks may help prevent an accident.
2. This scooter is designed to carry the operator and passenger.
3. The failure of motorists to detect and recognize scooters in traffic is the predominating
cause of automobile/scooter accidents. Many accidents have been caused by an automobile driver who did not see the scooter. Making yourself conspicuous appears to be very
effective in reducing the chance of this type of accident.
1
Therefore:
a. Wear a brightly colored jacket.
b. Use extra caution when approaching and passing through intersections, since intersec-
tions are the most likely places for scooter accidents to occur.
c. Ride where other motorists can see you. Avoid riding in another motorist’s blind spot.
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4. Many accidents involve inexperienced operators. In fact, many operators who have been
involved in accidents do not even have a current driver’s license.
1
a. Make sure that you are qualified and that you only lend your scooter to other qualified
operators.
b. Know your skills and limits. Staying within your limits may help you to avoid an accident.
c. 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.
5. 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 EXCESSIVE SPEED or under cornering (insufficient lean angle for the speed).
a. Always obey the speed limit and never travel faster than warranted by road and traffic
conditions.
b. Always signal before turning or changing lanes. Make sure that other motorists can see
you.
6. The posture of the operator and passenger is important for proper control.
a. The operator should keep both hands on the handlebar and both feet on the footboard
during operation to maintain control of the scooter.
b. 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.
c. Never carry a passenger unless he or she can firmly place both feet on the passenger
footrests.
7. Never ride under the influence of alcohol or other drugs.
8. 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.
1. Always wear an approved helmet.
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2. Wear a face shield or goggles. Wind in your unprotected eyes could contribute to an impairment of vision which could delay seeing a hazard.
3. The use of a jacket, substantial shoes, trousers, gloves, etc., is effective in preventing or
reducing abrasions or lacerations.
4. Never wear loose-fitting clothes, otherwise they could catch on the control levers or wheels
and cause injury or an accident.
5. Never touch the engine or exhaust system during or after operation. They become very hot
and can cause burns. Always wear protective clothing that covers your legs, ankles, and
feet.
6. Passengers should also observe the above precautions.
Modifications
Modifications made to this scooter not approved by Yamaha, or the removal of original equipment, may render the scooter unsafe for use and may cause severe personal injury. Modifications may also make your scooter illegal to use.
Loading and accessories
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 accessories to your scooter. Use extra care when riding a
scooter that has added cargo or accessories. Here are some general guidelines to follow if loading cargo or adding accessories to your scooter:
1
Loading
The total weight of the operator, passenger, accessories and cargo must not exceed the maximum load limit of 143 kg (315 lb). When loading within this weight limit, keep the following in
mind:
1. Cargo and accessory weight should be kept as low and close to the scooter as possible.
Make sure to distribute the weight as evenly as possible on both sides of the scooter to
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Q SAFETY INFORMATION
minimize imbalance or instability.
2. Shifting weights can create a sudden imbalance. Make sure that accessories and cargo are
1
securely attached to the scooter before riding. Check accessory mounts and cargo restraints
frequently.
3. 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.
Accessories
Genuine Yamaha accessories have been specifically designed for use on this scooter. Since
Yamaha cannot test all other accessories that may be available, you must personally be responsible for the proper selection, installation and use of non-Yamaha accessories. Use extreme
caution when selecting and installing any accessories.
Keep the following guidelines in mind, as well as those provided under “Loading” when mounting accessories.
1. Never install accessories or carry cargo that would impair the performance of your scooter.
Carefully 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 obscure lights or reflectors.
a. 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.
b. Bulky or large accessories may seriously affect the stability of the scooter due to aerody-
namic 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.
c. 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 recommended.
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Q SAFETY INFORMATION
2. Use caution when adding electrical accessories. If electrical accessories exceed the capacity
of the scooter’s electrical system an electric failure could result, which could cause a dangerous loss of lights or engine power.
Gasoline and exhaust gas
1. GASOLINE IS HIGHLY FLAMMABLE:
a. Always turn the engine off when refueling.
b. Take care not to spill any gasoline on the engine or exhaust system when refueling.
c. Never refuel while smoking or in the vicinity of an open flame.
2. Never start the engine or let it run for any length of time in a closed area. The exhaust fumes
are poisonous and may cause loss of consciousness and death within a short time. Always
operate your scooter in an area that has adequate ventilation.
3. Always turn the engine off before leaving the scooter unattended and remove the key from
the main switch. When parking the scooter, note the following:
a. The engine and exhaust system may be hot, therefore, park the scooter in a place where
pedestrians or children are not likely to touch these hot areas.
b. Do not park the scooter on a slope or soft ground, otherwise it may fall over.
c. Do not park the scooter near a flammable source (e.g., a kerosene heater, or near an
open flame), otherwise it could catch fire.
4. If you should swallow any gasoline, inhale a lot of gasoline vapor, or allow gasoline to get
into your eyes, see your doctor immediately. If any gasoline spills on your skin or clothing,
immediately wash the affected area with soap and water and change your clothes.
1
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Q SAFETY INFORMATION
Further safe-riding points
1. Make sure to signal clearly when making turns.
1
2. Braking can be extremely difficult on a wet road. Avoid hard braking, because the scooter could
slide. Apply the brakes slowly when stopping on a wet surface.
3. Slow down as you approach a corner or turn. Once you have completed a turn, accelerate slowly.
4. Be careful when passing parked cars. A driver might not see you and open a door in your path.
5. 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.
6. The brake lining could get wet when you wash the scooter. After washing the scooter, check the
brakes before riding.
7. Always wear a helmet, gloves, trousers (tapered around the cuff and ankle so they do not flap),
and a bright colored jacket.
8. Do not carry too much luggage on the scooter. An overloaded scooter is unstable. Use a strong
cord to secure any luggage to the carriers. A loose load will affect the stability of the scooter and
could divert your attention from the road. (See page 1-3 in the “Loading and accessories” section
for instructions on carrying a load.)
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Turning left Turning right
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Q SAFETY INFORMATION
Location of important labels
Please read the following important labels carefully before operating this scooter.
6
5
4
1
3
2
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1
5
1
6
2
3
4
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1
1-9
DESCRIPTION
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Left view
1 2 3 4 5 6 7
2
1. Front wheel
2. Front brake caliper (Page 6-14)
3. Front turn signal light
4. Helmet holder (Page 3-9)
5. Storage compartment (Page 3-9)
6. Rear turn signal light
11 10 9 8
7. Rear wheel
8. Rear brake lever free play adjusting nut (Page 6-14)
9. Kickstarter (Page 3-8)
10. Air filter element (Page 6-8)
11. Battery (Page 6-20)
2-1
DESCRIPTION
Right view
12 13 14 15 16 17
20 19 18
12. Tail/brake light
13. Carrier (Page 3-11)
14. Fuel and 2-stroke engine oil tank caps (Page 3-6)
15. Seat (Page 3-8)
16. Brake master cylinder (Page 6-15)
17. Headlight
2
18. Spark plug (Page 6-5)
19. Centerstand
20. Muffler
2-2
DESCRIPTION
Controls and instruments
2
21 22 23 24 25 26
27
28
21. Rear brake lever (Page 3-5)
22. Left handlebar switches (Page 3-4)
23. Speedometer unit (Page 3-3)
24. Fuel gauge (Page 3-4)
25. Right handlebar switches (Page 3-4)
26. Front brake lever (Page 3-5)
27. Throttle grip (Page 6-10)
28. Main switch/steering lock (Page 3-1)
2-3
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INSTRUMENT AND CONTROL FUNCTIONS
*
OFF
LOCK
Main switch/steering lock
The main switch/steering lock controls the ignition and lighting systems, and is used to lock the steering. The various positions are described below.
ON
All electrical circuits are supplied
with power, the taillight and the license plate light come on, and the
engine can be started. The key cannot be removed.
NOTE:
The headlight and meter lighting
come on automatically when the
engine is started.
ON
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OFF
All electrical systems are off. The key
can be removed.
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*
The engine oil level warning light
should come on. See page 3-3 for
an explanation of the engine oil level
warning light.
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LOCK
The steering is locked, and all electrical systems are off. The key can
be removed.
3
3-1
INSTRUMENT AND CONTROL FUNCTIONS
OFF(PUSH)
3
LOCK
To lock the steering
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.
To unlock the steering
Push the key in, and then turn it to
“OFF” while still pushing it.
1 2
1. Push
2. Turn
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Never turn the key to “OFF” or
“LOCK” while the scooter is moving, otherwise the electrical systems
will be switched off, which may result in loss of control or an accident.
Make sure that the scooter is
stopped before turning the key to
“OFF” or “LOCK”.
1 2 3
20
•
•
30
40
•20
10
30
•
50
•10
km/h
60•
40
•0
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MPH
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1. Turn signal indicator light “4/6”
2. High beam indicator light “&”
3. 2-stroke engine oil level warning light
“7”
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Indicator and warning lights
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Turn signal indicator light “4/6”
This indicator light flashes when the
turn signal switch is pushed to the
left or right.
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High beam indicator light “&”
This indicator light comes on when
the high beam of the headlight is
switched on.
3-2
0
10
20
30
40
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MPH
•10
•20
30
40
50
60•
km/h
•0
•
•
•
INSTRUMENT AND CONTROL FUNCTIONS
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2-stroke engine oil level warning
light “7”
The warning light comes on when
the key is in the “*” position or when
the engine oil level in the 2-stroke
engine oil tank is low during operation. If the warning light comes on
during operation, stop immediately
and fill the oil tank with YAMALUBE
2 or an equivalent 2-stroke engine
oil. The warning light should go off
after the 2-stroke engine oil tank has
been refilled.
NOTE:
If the warning light does not come
on when the key is in the “*” position or does not go off after the 2stroke engine oil tank has been refilled, have a Yamaha dealer check
the electrical circuit.
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Do not operate the scooter until you
know that the engine oil level is sufficient.
1 2
1. Speedometer unit
2. Fuel gauge
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Speedometer unit
The speedometer unit is equipped
with a speedometer and an odometer. The speedometer shows riding
speed. The odometer shows the total distance traveled.
3
3-3
INSTRUMENT AND CONTROL FUNCTIONS
1
20
•
•
30
40
•20
10
30
•
50
•10
km/h
60•
40
•0
0
MPH
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3
1. Fuel gauge
Fuel gauge
The fuel gauge indicates the amount
of fuel in the fuel tank. The needle
moves towards “E” (Empty) as the
fuel level decreases. When the
needle reaches “E”, refuel as soon
as possible.
NOTE:
Do not allow the fuel tank to empty
itself completely.
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1
2
3
4
ENGINE STOP
START
5
1. Dimmer switch “&/%”
2. Turn signal switch “4/6”
3. Horn switch “*”
4. Engine stop switch “$/#”
5. Start switch “,”
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Handlebar switches
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Dimmer switch “&/%”
Set this switch to “&” for the high
beam and to “%” for the low beam.
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Turn signal switch “4/6”
To signal a right-hand turn, push this
switch to “6”. To signal a left-hand
turn, push this switch to “4”. When
released, the switch returns to the
center position. To cancel the turn
signal lights, push the switch in after it has returned to the center position.
3-4
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Horn switch “*”
Press this switch to sound the horn.
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Engine stop switch “$/#”
Set this switch to “#” before starting the engine. Set this switch to
“$” to stop the engine in case of an
emergency, such as when the
scooter overturns or when the
throttle cable is stuck.
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Start switch “,”
Push this switch to crank the engine
with the starter.
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See page 5-1 for starting instructions prior to starting the engine.
FRONT REAR
INSTRUMENT AND CONTROL FUNCTIONS
3
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Front brake lever
The front brake lever is located on
the right handlebar grip. To apply the
front brake, pull this lever toward the
handlebar grip.
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Rear brake lever
The rear brake lever is located on the
left handlebar grip. To apply the rear
brake, pull this lever toward the
handlebar grip.
3-5
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