2003 YAMAHA WHY 50 lock

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
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.
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 scoo-
ter is stopped before turning the key
to “ ” or “ ”.
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.
3-1

3
INSTRUMENT AND CONTROL FUNCTIONS
1
ZAUM0084
1
ZAUM0085
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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.
1. Front brake lever
1. Rear brake lever
12
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
3
EAU03091
Rider seat
To open the rider seat
1. Place the scooter on the
centerstand.
2. Insert the key into the main switch,
and then turn it counterclockwise.
NOTE :
Do not push inward when turning the
key.
3. Fold the rider seat up.To close the rider seat
1. Fold the rider seat down, and then
push it down to lock it in place.
2. Remove the key from the main
switch if the scooter will be left
unattended.
NOTE :
Make sure that the seat is properly
secured before riding.
PUSH
OPEN
ZAUM0253ZAUM0363
OPEN
OPEN
UNLOCKLOCK
OPEN
OPEN
UNLOCKLOCK
OPENOPEN
UNLOCKLOCK
ZAUM0364
3-8
EAUM0096
Storage compartment
To unlock the storage compartment
Insert the key in the lock and turn it 1/4
turn clockwise.
To open the storage compartment
when it is unlocked
Turn the knob 1/4 turn clockwise. The
knob will return to its original position
after released.
To close the storage compartment
Push the lid into the original position
To lock the storage compartment
Insert the key in the lock and turn it 1/4
turn counterclockwise, and then
remove the key.

PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU00732
Checking the brake fluid
level
Insufficient brake fluid may allow air to
enter the brake system, possibly
causing it to become ineffective.
Before riding, check that the brake fluid
is above the minimum level mark and
replenish if necessary. A low brake fluid
level may indicate worn brake pads
and/or brake system leakage. If the
brake level is low, be sure to check the
brake pads for wear and the brake
system for leakage.Observe these precautions:
•When checking the fluid level,
make sure that the top of the
master cylinder is level by turning
the handlebars.
•Use only the recommended
quality brake fluid, otherwise the
rubber seals may deteriorate,
causing leakage and poor braking
performance.
Recommended brake fluid:
DOT 4
NOTE :
If DOT 4 is not available, DOT 3 can be
used.
•Refill with the same type of brake
fluid. Mixing fluids may result in a
harmful chemical reaction and
lead to poor braking performance.
•Be careful that water does not
enter the master cylinder when
refilling. Water will significantly
lower the boiling point of the fluid
and may result in vapor lock.
•Brake fluid may deteriorate
painted surfaces or plastic parts.
Always clean up spilled fluid
immediately.
•As the brake pads wear, it is nor-
mal for the brake fluid level to
gradually go down. However, if the
brake fluid level goes down
suddenly, have a Yamaha dealer
check the cause.
1
ZAUM0377
1. Brake fluid level
6-14

PERIODIC MAINTENANCE AND MINOR REPAIR
6
EW000119
Headlight bulbs get very hot.
Therefore, keep flammable products
away from a lit headlight bulb, and
do not touch the bulb until it has
cooled down.
4. Place a new bulb into position,
and then secure it with the bulb
holder.
5. Connect the lead connectors, and
then install the headlight unit by
installing the screws.
6. Have a Yamaha dealer adjust the
headlight beam if necessary.
6-20
EAU00846
Replacing the headlight bulb
If the headlight bulb burns out, replace
it as follows.
1. Remove the headlight unit by
removing the screws.
2. Disconnect the headlight lead
connectors.
3. Remove the headlight bulb holder
by pushing it inward and turning it
counterclockwise, and then
remove the defective bulb.
1
ZAUM0381
1. Headlight bulb holder
EC000103
Do not use a fuse of a higher amperage
rating than recommended to avoid
causing extensive damage to the
electrical system and possibly a fire.
3. Turn the key to "
" and turn on
the electrical circuits to check if the
devices operate.
4. If the fuse immediately blows
again, have a Yamaha dealer
check the electrical system.

PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAUM0037
Replacing the brake/taillight
bulb
1. Remove the brake/taillight lens by
removing the screws.
2. Remove the brake/taillight bulb
holder by turning it 1/4 turn
counter-clockwise.
3. Remove the defective bulb.
4. Place a new bulb into position,
and then secure it with the bulb
holder.
5. Place the brake/taillight lens in the
original position, and then install
the screw.
ZAUM0382
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Replacing a turn signal light
bulb
1. Remove the turn signal light lens
by removing the screw.
2. Remove the defective bulb by
pushing it in and turning it
counterclockwise.
3. Insert a new bulb into the socket,
push it in, and then turn it
clockwise until it stops.
4. Install the lens by installing the
screw.
ECA00065
Do not overtighten the screw,
otherwise the lens may break.
ZAUM0383
6-21