Yamaha why YH50 User manual

OWNER’S MANUAL
5XS-F8199-E0
YH50

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!

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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.

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PLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY BEFORE OPERATING THIS
SCOOTER.
IMPORTANT MANUAL INFORMATION

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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.

11 GIVE SAFETY THE RIGHT OF WAY
2 DESCRIPTION
3 INSTRUMENT AND CONTROL FUNCTIONS
4 PRE-OPERATION CHECKS
5 OPERATION AND IMPORTANT RIDING POINTS
6 PERIODIC MAINTENANCE AND MINOR REPAIR
7 SCOOTER CARE AND STORAGE
8 SPECIFICATIONS
CONSUMER INFORMATION
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TABLE OF CONTENTS
2
3
4
5
6
7
8
9

GIVE SAFETY THE RIGHT OF WAY .................................................. 1-1
Further safe-riding points .................................................................... 1-2
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GIVE SAFETY THE RIGHT OF WAY
1

GIVE SAFETY THE RIGHT OF WAY
1
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.
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 illu-
sion of total safety and protection, motorcyclists will always be vulnerable. Riders who lack critical self-
control 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!
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GIVE SAFETY THE RIGHT OF WAY
1
1-2
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Further safe-riding points
•Be 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 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.

Left view .............................................................................................. 2-1
Right view............................................................................................ 2-2
2
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DESCRIPTION

2
DESCRIPTION
Left view
6
5
7
1234
1. Rear brake lever (page 3-5, 6-12, 6-15)
2. Fuel gauge (page 3-3)
3. Speedometer (page 3-3)
4. Main switch (page 3-1, 3-8)
5. Final transmission oil filler cap (page 6-6)
6. Kick starter (page 3-7)
7. Air filter (page 6-7)
2-1

2
DESCRIPTION
Right view
8910 11
12
13
14
8. Rear carrier (page 3-9)
9. Passenger seat —
10. Throttle grip (page 6-9, 6-15)
11. Front brake lever (page 3-5, 6-12, 6-15)
12. Luggage hook (page 3-9)
13. Battery / fuse (page 6-18 — 6-19)
14. Fuel and oil tank cap (page 3-5)
2-2

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INSTRUMENT AND CONTROL FUNCTIONS
Main switch / steering lock .................................................................. 3-1
Indicator and warning 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 and 2-stroke engine oil tank caps ............................................... 3-5
Fuel ..................................................................................................... 3-6
Catalytic converter .............................................................................. 3-7
2-stroke engine oil ............................................................................... 3-7
Kickstarter ........................................................................................... 3-7
Rider seat ............................................................................................ 3-8
Storage compartment ......................................................................... 3-8
Carrier ................................................................................................. 3-9
Luggage hook ..................................................................................... 3-9
3

3
INSTRUMENT AND CONTROL FUNCTIONS
PUSH
OPEN
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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.
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OFF “ ”
All electrical systems are off. The key
can be removed.
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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.
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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.
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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 scoo-
ter is stopped before turning the key
to “ ” or “ ”.
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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.
3-1

INSTRUMENT AND CONTROL FUNCTIONS
3
12
ZAUM0184
1. Turn signal indicator light " "
2. High beam indicator light " `"
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Turn signal indicator light " "
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.
1
ZAUM0357
1. Oil level indicator light " "
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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 cir-
cuit.
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Do not operate the scooter until you
know that the engine oil level is
sufficient.
3-2
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Indicator and warning lights

3
INSTRUMENT AND CONTROL FUNCTIONS
1
2
ZAUM0185
1. Speedometer
2. Odometer
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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.
1
ZAUM0358
1. Fuel gauge
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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 possi-
ble.
NOTE :
Do not allow the fuel tank to empty itself
completely.
3-3