2003 YAMAHA WHY 50 light

EAU00027
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
ZAUM0253
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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.
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 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
312ZAUM0184
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.
EC000000
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

INSTRUMENT AND CONTROL FUNCTIONS
3
1
2
3
4
ZAUM0359
1
ZAUM0360
1. Dimmer switch " / "
2. Cancel button
3. Turn signal switch "
/ "
4. Horn switch "
"
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Handlebar switchesEAU03888
Dimmer switch " / "
Set this switch to "
" for the high beam
and to "
" for the low beam.
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Horn switch ""
Press this switch to sound the horn.
EAUM0063
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 instruc-
tions prior to starting the engine.
1. Start switch ""
3-4
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 si-
gnal lights, push the cancel button, and
then release it.

3
INSTRUMENT AND CONTROL FUNCTIONS
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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
exhaust 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.
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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
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.
1
ZAUM0362
1. Kickstarter
3-7

4
PRE-OPERATION CHECKS
NOTE :
Pre-operation checks should be made each time the scooter is used. Such an inspection can be accomplished in a very
short time; and the added safety it assures is more than worth the time involved.
EWA00033
If any item in the Pre-operation check list is not working properly, have it inspected and repaired before operating
the scooter.
ITEM CHECKS PAGE
•Check for damage.
Wheels and tires•Check tire condition and tread depth.
6-10 — 6-11
•Check air pressure.
•Correct if necessary.
Brake levers•Make sure that operation is smooth.
6-12, 6-15
•Lubricate lever pivoting points if necessary.
Centerstand•Make sure that operation is smooth.
6-16
•Lubricate pivot if necessary.
Chassis fasteners•Make sure that all nuts, bolts and screws are properly tightened.
—
•Tighten if necessary.
Instruments, lights, signals•Check operation.
3-2 — 3-4
and switch•Correct if necessary.
Battery•Check fluid level.
6-18
•Fill with distilled water if necessary.
4-2

OPERATION AND IMPORTANT RIDING POINTS
5
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EW000129
•Become thoroughly familiar
with all operating controls and
their functions before riding.
Consult a Yamaha dealer
regarding any control or
function that you do not
thoroughly understand.
•Never start the engine or
operate it in a closed area for
any length of time. Exhaust fu-
mes are poisonous, and
inhaling them can cause loss of
consciousness and death
within a short time. Always
make sure that there is
adequate ventilation.
•For safety, always start the
engine with the centerstand
down.
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Starting the engineEC000046
See page 5-4 for engine break-in ins-
tructions prior to operating the
vehicle for the first time.
1. Turn the key to "
", and when the
oil level warning light comes on,
turn it to "
".EC000045
If the oil level warning light does not
come on, have a Yamaha dealer
check the electrical circuit.
2. Close the throttle completely.3. While applying the front or rear
brake, start the engine by pushing
the start switch or by pushing the
kickstarter lever down.
NOTE :
If the engine fails to start by pushing
the start switch, release the switch, wait
a few seconds, and then try again. Each
starting attempt should be as short as
possible to preserve the battery. Do not
crank the engine more than 5 seconds
on any one attempt. If the engine does
not start with the starter motor, try using
the kickstarter.
ZAUM0367
PUSH
OPEN
ZAUM0253
5-1

OPERATION AND IMPORTANT RIDING POINTS
5
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Braking
1. Close the throttle completely.
2. Apply both front and rear brakes
simultaneously while gradually
increasing the pressure.
EW000057
•Avoid braking hard or suddenly
(especially when leaning over
to one side), otherwise the
scooter may skid or overturn.
ZAUM0269
•Railroad crossings, streetcar
rails, iron plates on road cons-
truction sites, and manhole
covers become extremely
slippery when wet. Therefore,
slow down when approaching
such areas and cross them with
caution.
•Keep in mind that braking on a
wet road is much more difficult.
Ride slowly down a hill, as
braking downhill can be very
difficult.
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Tips for reducing fuel
consumption
Fuel consumption depends largely on
your riding style. Consider the following
tips to reduce fuel consumption:
•Thoroughly warm up the engine.
Avoid high engine speeds during
acceleration.
•Avoid high engine speeds with no
load on the engine.
•Turn the engine off instead of
letting it idle for an extended length
of time (e.g., in traffic jams, at
traffic lights or at railroad
crossings).
5-3