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OWNER’S MANUAL
YH50
5XS-F8199-E0
EAU04576
INTRODUCTION
Welcome to the Yamaha world of motorcycling!
As the owner of the YH50, you are benefiting from Yamaha's vast experience and newest technology regarding the design and manufacture of high-quality products, which have earned Yamaha a reputation for dependability.
Please take the time to read this manual thoroughly, so as to enjoy all advantages of your YH50. The owner's manual does not only instruct you in how to operate, inspect and maintain your scooter, but also in how to safeguard yourself and others from trouble and injury.
In addition, the many tips given in this manual will help keep your scooter in the best possible condition. If you have any further questions, do not hesitate to contact your Yamaha dealer.
The Yamaha team wishes you many safe and pleasant rides. So, remember to put safety first!
EAU00005
IMPORTANT MANUAL INFORMATION
Particularly important information is distinguished in this manual by the following notations:
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.
NOTE : A NOTE provides key information to make procedures easier or clearer.
NOTE :
•This manual should be considered a permanent part of this scooter and should remain with it even if the scooter is subsequently sold.
•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
EW000002
PLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY BEFORE OPERATING THIS SCOOTER.
EAUM0023
YH50
OWNER'S MANUAL
© 2003 by MBK INDUSTRIE 1st Edition, January 2003 All rights reserved
Any reprinting or unauthorized use without the written permission of MBK INDUSTRIE
is expressly prohibited. Printed in France.
EAU00009
TABLE OF CONTENTS
1 |
GIVE SAFETY THE RIGHT OF WAY |
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2 |
DESCRIPTION |
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3 |
INSTRUMENT AND CONTROL FUNCTIONS |
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4 |
PRE-OPERATION CHECKS |
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5 |
OPERATION AND IMPORTANT RIDING POINTS |
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6 |
PERIODIC MAINTENANCE AND MINOR REPAIR |
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7 |
SCOOTER CARE AND STORAGE |
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8 |
SPECIFICATIONS |
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9 |
CONSUMER INFORMATION |
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9 |
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EAU00021 |
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EW000015 |
GIVE SAFETY THE RIGHT OF WAY |
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GIVE SAFETY THE RIGHT OF WAY .................................................. |
1-1 |
Further safe-riding points .................................................................... |
1-2 |
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1 |
GIVE SAFETY THE RIGHT OF WAY
Scooters are fascinating vehicles, which can give you an unsurpassed feeling of power and freedom. However, they also impose certain limits, which you must accept; even the best scooter does not ignore the laws of
physics.
1
Regular care and maintenance are essential for preserving value and operating condition of your scooter. Moreover, what is true for the scooter is also true for the rider: good performance depends on being in good shape. Riding under the influence of medication, drugs and alcohol is, of course, out of the question. Scooter riders—more than car drivers—must always be at their mental and physical best. Under the influence of even small amounts of alcohol, there is a tendency to take dangerous risks.
Protective clothing is as essential for the scooter rider as seat belts are for car drivers and passengers. Always wear a complete scooter suit (whether made of leather or tear-resistant synthetic materials with protectors), sturdy boots, scooter gloves and a properly fitting helmet. Optimum protective wear, however, should not encourage carelessness. Although full-coverage helmets and suits, in particular, create an illusion of total safety and protection, motorcyclists will always be vulnerable. Riders who lack critical selfcontrol run the risk of going too fast and are apt to take chances. This is even more dangerous in wet weather. The good motorcyclist rides safely, predictably and defensively — avoiding all dangers, including those caused by others.
Enjoy your ride!
1-1
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GIVE SAFETY THE RIGHT OF WAY |
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EAU02964 |
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Further safe-riding points |
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Be sure to signal clearly when making turns. |
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Braking can be extremely difficult on a wet road. Avoid hard braking, because the scooter could slide. 1 |
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Apply the brakes slowly when stopping on a wet surface.
•Slow down as you approach a corner or turn. Once you have completed 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 washing the scooter, check the brakes before riding.
•Always wear a helmet, gloves, trousers (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. Use a strong cord to secure any luggage to the carrier. A loose load will affect the stability of the scooter and could divert
your attention from the road.
1-2
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EAU01161 |
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DESCRIPTION |
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Left view .............................................................................................. |
2-1 |
Right view............................................................................................ |
2-2 |
2
DESCRIPTION
Left view
1 2 3 4
2
7 
6 
5
1. |
Rear brake lever |
(page 3-5, 6-12, 6-15) |
5. |
Final transmission oil filler cap |
(page 6-6) |
2. |
Fuel gauge |
(page 3-3) |
6. |
Kick starter |
(page 3-7) |
3. |
Speedometer |
(page 3-3) |
7. |
Air filter |
(page 6-7) |
4. |
Main switch |
(page 3-1, 3-8) |
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2-1
DESCRIPTION
Right view
8 9 10 11
2
14
13 
12
8. |
Rear carrier |
(page 3-9) |
12. |
Luggage hook |
(page 3-9) |
9. |
Passenger seat |
— |
13. |
Battery / fuse |
(page 6-18 — 6-19) |
10. |
Throttle grip |
(page 6-9, 6-15) |
14. |
Fuel and oil tank cap |
(page 3-5) |
11. |
Front brake lever |
(page 3-5, 6-12, 6-15) |
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2-2
EAU00027
INSTRUMENT AND CONTROL FUNCTIONS
..................................................................Main switch / steering lock |
3-1 |
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Indicator and warning lights ................................................................ |
3-2 |
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Speedometer unit ................................................................................ |
3-3 |
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Fuel gauge .......................................................................................... |
3-3 |
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Handlebar switches ............................................................................. |
3-4 |
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Front brake lever ................................................................................. |
3-5 |
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Rear brake lever .................................................................................. |
3-5 |
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Fuel and 2-stroke engine oil tank caps |
3-5 |
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Fuel ..................................................................................................... |
3-6 |
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Catalytic converter .............................................................................. |
3-7 |
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2-stroke engine oil ............................................................................... |
3-7 |
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Kickstarter ........................................................................................... |
3-7 |
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Rider seat ............................................................................................ |
3-8 |
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Storage compartment ......................................................................... |
3-8 |
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Carrier ................................................................................................. |
3-9 |
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Luggage hook ..................................................................................... |
3-9 |
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INSTRUMENT AND CONTROL FUNCTIONS
OPEN
PUSH
3
ZAUM0253
EAU00029
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.
EAU04384
ON “
”
All electrical circuits are supplied with power, the taillight and meter lighting come on, and the engine can be started. The key cannot be removed.
NOTE :
The headlight comes on as soon as the engine is started.
EAU00038
OFF “
”
All electrical systems are off. The key can be removed.
EAU04470
CHECK “
”
The 2-stroke engine oil level warning light should come on. See page 3-2 for an explanation of the engine oil level warning light.
EAU00040
LOCK “ 
”
The steering is locked, and all electrical systems are off. The key can be removed.
To lock the steering
1.Turn the handlebars all the way to the left.
2.Push the key in from the “ 
” position, and then turn it to “ 
” while still pushing it.
3.Remove the key.
To unlock the steering
Push the key in, and then turn it to “ 
” while still pushing it.
EW000016
Never turn the key to “ 
” or “ 
” 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 “
” or “
”.
3-1
INSTRUMENT AND CONTROL FUNCTIONS
1
2
ZAUM0184
1.Turn signal indicator light "
"
2.High beam indicator light "
`"
EAU03034
Indicator and warning lights
EAU00057
Turn signal indicator light "
"
This indicator light flashes when the turn signal switch is pushed to the left or right.
EAU00063
High beam indicator light "
"
This indicator light comes on when the high beam of the headlight is switched on.
1
ZAUM0357
1. Oil level indicator light "
"
EAU02958
Oil level warning light "
"
This warning light comes on when the key is in the "
" position or when the 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 equivalent 2-stroke engine oil of either JASO grade "FC" or ISO grades "EG-C" or "EG-D". 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 2-stroke engine oil tank has been refilled, have a Yamaha dealer check the electrical circuit.
3
EC000000
Do not operate the scooter until you know that the engine oil level is sufficient.
3-2
INSTRUMENT AND CONTROL FUNCTIONS
2 1
3
ZAUM0185
1.Speedometer
2.Odometer
EAU00098
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.
1
ZAUM0358
1. Fuel gauge
EAU00113
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.
3-3
INSTRUMENT AND CONTROL FUNCTIONS
1
2
3
4
ZAUM0359
1.Dimmer switch "
/ 
"
2.Cancel button
3.Turn signal switch "
/ 
"
4.Horn switch "
"
EAUM0097
Turn signal 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 center position. To turn off the turn signal lights, push the cancel button, and then release it.
EAU00129
Horn switch "
"
Press this switch to sound the horn.
1
3
ZAUM0360
1. Start switch "
"
EAU00118 |
EAUM0063 |
Handlebar switches
EAU03888
Dimmer switch "
/ 
"
Set this switch to "
" for the high beam and to "
" for the low beam.
Start switch "
"
Push this switch while applying the front or rear brake to crank the engine with the starter.
EC000005
See page 5-1 for starting instructions prior to starting the engine.
3-4
INSTRUMENT AND CONTROL FUNCTIONS
1
3
ZAUM0084
1. Front brake lever
EAU03882
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.
1
ZAUM0085
1. Rear brake lever
EAU00163
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.
1 2
ZAUM0361
1.Oil tank cap
2.Fuel tank cap
EAU03463
Fuel and 2-stroke engine oil tank caps
The fuel tank cap and the 2-stroke engine oil tank cap are located under the seat. (See page 3-8 for seat opening and closing procedures.)
Fuel tank cap
To remove the fuel tank cap, turn it counterclockwise, and then pull it off. To install the fuel tank cap, turn it clockwise.
3-5
INSTRUMENT AND CONTROL FUNCTIONS
ZAUM0204
2-stroke engine oil tank cap
To remove the 2-stroke engine oil tank cap, pull it off.
To install the 2-stroke engine oil tank cap, push it into the oil tank opening.
EW000025
Make sure that the fuel and 2-stroke engine oil tank caps are properly installed before riding the scooter.
1
2
ZAUM0020
1.Filler tube
2.Fuel level
EAU03753
Fuel
Make sure that there is sufficient fuel in the tank. Fill the fuel tank to the bottom of the filler tube as shown.
EW000130
•Do not overfill the fuel tank, otherwise it may overflow when
the fuel warms up and expands.
•Avoid spilling fuel on the hot engine.
EAU00185
EC000008
Immediately wipe off spilled fuel with a clean, dry, soft cloth, since fuel may deteriorate painted surfaces or plastic parts.
3
EAU04206
Recommended fuel: REGULAR UNLEADED GASOLINE ONLY
Fuel tank capacity: Total amount:
7.2 L
Your Yamaha engine has been designed to use regular unleaded gasoline with a research octane number of 91 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.
3-6
INSTRUMENT AND CONTROL FUNCTIONS
EAU03098
Catalytic converter
This scooter is equipped with a catalytic converter in the muffler.
EW000128
The exhaust system is hot after operation. Make sure that the
3exhaust system has cooled down before doing any maintenance work.
EC000114
The following precautions must be observed to prevent a fire hazard or other damages.
•Use only unleaded gasoline. The use of leaded gasoline will
cause unrepairable damage to the catalytic converter.
•Never park the scooter near possible fire hazards such as
grass or other materials that easily burn.
•Do not allow the engine to idle too long.
EAU03750
2-stroke engine oil
Make sure that there is sufficient oil in the 2-stroke engine oil tank. Add the recommended 2-stroke engine oil if necessary.
NOTE :
Make sure that the 2-stroke engine oil tank cap is properly installed.
Recommended oil: Yamalube 2 or equivalent 2-stroke engine oil (JASO grade "FC",
or ISO grades "EG-C" or "EG-D") Oil quantity:
1.3 L
1
ZAUM0362
1. Kickstarter
EAUS0015
Kickstarter
To start the engine, push the kickstarter down lightly with your foot until the gears engage, and then push it down smoothly but forcefully.
3-7
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