2004 YAMAHA WHY 50 turn signal

GIVE SAFETY THE RIGHT OF WAY
1
1-2
EAU02964
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.

INSTRUMENT AND CONTROL FUNCTIONS
312ZAUM0184
1. Turn signal indicator light ""
2. High beam indicator light "
`"
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 cir-
cuit.
EC000000
Do not operate the scooter until you
know that the engine oil level is
sufficient.
3-2
EAU03034
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 "
"
EAU00118
Handlebar switchesEAU03888
Dimmer switch " / "
Set this switch to "
" for the high beam
and to "
" for the low beam.
EAU00129
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.

OPERATION AND IMPORTANT RIDING POINTS
5
EAU04473
Starting off
NOTE :
Before starting off, allow the engine to
warm up.
1. While pulling the rear brake lever
with your left hand and holding the
carrier with your right hand, push
the scooter off the centerstand.
2. Sit astride the seat, and then
adjust the rear view mirrors.
3. Switch the turn signal on.
4. Check for oncoming traffic, and
then slowly turn the throttle grip
(on the right) in order to take off.
5. Switch the turn signal off.
ZAUM0268
ECA00045
For maximum engine life, never
accelerate hard when the engine is
cold!
ZAUM0368
EAU00434
Acceleration and
deceleration
The speed can be adjusted by opening
and closing the throttle. To increase the
speed, turn the throttle grip in direction
a . To reduce the speed, turn the
throttle grip in direction b .
5-2

EAU00462
PERIODIC MAINTENANCE AND MINOR REPAIR
Periodic maintenance and lubrication chart ............ 6-2
Removing and installing the panel .......................... 6-5
Panel A .................................................................... 6-5
Checking the spark plug ......................................... 6-5
Final transmission oil .............................................. 6-6
Cleaning the air filter element ................................. 6-7
Adjusting the carburetor .......................................... 6-9
Adjusting the throttle cable free play ....................... 6-9
Tires ...................................................................... 6-10
Cast wheels .......................................................... 6-11
Adjusting the front brake lever free play ................ 6-12
Adjusting the front brake lever free play ................ 6-12
Checking the front brake pads .............................. 6-13
and rear brake shoes
Checking the brake fluid level ............................... 6-14
6 Changing the brake fluid ....................................... 6-15
Checking and lubricating the throttle grip .............. 6-15
and cable
Lubricating the front and rear brakes levers .......... 6-15
Checking and lubricating the centerstand ............. 6-16
Checking the front fork .......................................... 6-16
Checking the steering ........................................... 6-17
Checking the wheel bearings ................................ 6-17
Battery ................................................................... 6-18
Replacing the fuse ................................................ 6-19
Replacing a headlight bulb .................................... 6-20
Replacing the brake taillight bulb .......................... 6-21
Replacing a turn signal light bulb .......................... 6-21
Troubleshooting ..................................................... 6-22
Troubleshooting chart ............................................ 6-23

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
EAU03497
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

SPECIFICATIONS
8
Electrical:
Ignition system typeC.D.I
Charging system Flywheel magneto
Battery
Model GM4-3B, YB4L-B, FB4L-B
Voltage/capacity 12 V / 4 Ah
Headlight type:Bulb
Bulbs (voltage/wattage x quantity):
Headlight 12V, 35W/35Wx1
Brake/brake light 12V, 5W/21Wx1
Turn signal light
Front 12V, 10Wx2
Rear 12V, 10Wx2
Meter lights 12V, 1.2Wx2
High beam indicator light 12V, 1.2Wx1
Turn signal indicator light 12V, 1.2Wx1
Oil warning light 12V, 2Wx1
Fuses:
Main fuse 7.5 A
8-3