2004 YAMAHA WHY 50 oil

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

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

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

3
INSTRUMENT AND CONTROL FUNCTIONS
1
ZAUM0084
1
ZAUM0085
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.
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. 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
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.
ZAUM0204
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 plas-
tic parts.
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

3
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
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.
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
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