engine YAMAHA AEROX50 2003 Owners Manual

EAU00027
INSTRUMENT AND CONTROL FUNCTIONS
Main switch / steering lock .................................................................. 3-1
Indicator and warning lights ................................................................ 3-2
Coolant temperature warning light ...................................................... 3-2
Speedometer unit ................................................................................ 3-3
Tachometer (depends on model) ........................................................ 3-3
Fuel gauge .......................................................................................... 3-3
Handlebar switches ............................................................................. 3-4
Front brake lever ................................................................................. 3-5
Rear brake lever .................................................................................. 3-5
Fuel tank cap ...................................................................................... 3-5
Fuel .....................................................................................................\o 3-6
Catalytic converter .............................................................................. 3-7
Kick starter .......................................................................................... 3-7
2-stroke engine oil tank cap ................................................................ 3-8
2-stroke engine oil ............................................................................... 3-8
Starter (choke) lever ............................................................................ 3-9
Rider seat ............................................................................................ 3-9
Storage compartment A .................................................................... 3-10
Storage compartment B .................................................................... 3-11
Adjusting the shock absorber assembly (depends on model) ........... 3-11
3

3
INSTRUMENT AND CONTROL FUNCTIONS
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.
PUSH
OPEN
ZAUM0253
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 “ ”.
WARNING
3-1
EAU00037
ON “ ”
All electrical circuits are supplied with
power, and the engine can be started.
The key cannot be removed.
NOTE :
The headlight, meter lighting and
taillight come on automatically when the
engine is started.

INSTRUMENT AND CONTROL FUNCTIONS
3
EAU03034
Indicator and warning lights
TEMP
123
ZAUM0254
1. Turn signal indicator light “ ”
2. High beam indicator light “
”
3. Oil 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.
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 circuit.
EC000000
Do not operate the scooter until you
know that the engine oil level is
sufficient.
CAUTION:
EAU01716
Coolant temperature warning light
“
”
This warning light comes on when the
engine overheats. When this occurs,
stop the engine immediately and allow
the engine to cool.
EC000002
Do not operate the engine if it is
overheated.
CAUTION:
TEMP
1ZAUM0255
1. Coolant temperature warning light “ ”
3-2

3
INSTRUMENT AND CONTROL FUNCTIONS
EAU00098
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.
EAU00113
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 possible.
NOTE :
Do not allow the fuel tank to empty itself
completely.
E1/2
F1
ZAUM0257
1. Speedometer
2. Odometer1. Fuel gauge
3-3
1
2
ZAUM0292M
1. Tachometer
2. Red zone
EAU00101
Tachometer
(Depends on model)
The electric tachometer allows the ri-
der to monitor the engine speed and
keep it within the ideal power range.
EC000003
Do not operate the engine in the
tachometer red zone.
Red zone: 10.000 r/min and above
CAUTION:
2
1
ZAUM0291M
UK ONLY

INSTRUMENT AND CONTROL FUNCTIONS
3
EAU00118
Handlebar switches
EAU03888
Dimmer switch “/”
Set this switch to “
” for the high beam
and to “
” for the low beam.
EAU03889
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 cancel the
turn signal lights, push the switch in after it
has returned to the center position.
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 5-2 for starting instruc-
tions prior to starting the engine.
1
2 3
ZAUM0258
1
ZAUM0261
1. Horn switch “”
2. Turn signal switch “/”
3. Dimmer switch “
/”
CAUTION:
1. Start switch “”
3-4

INSTRUMENT AND CONTROL FUNCTIONS
3 To close the fuel tank cap
1. Push the fuel tank cap into posi-
tion with the key inserted in the
lock.
2. Turn the key clockwise to the ori-
ginal position, remove it, and then
close the lock cover.
NOTE :
The fuel tank cap cannot be closed
unless the key is in the lock. In addi-
tion, the key cannot be removed if the
cap is not properly closed and locked.
EWA00025
Make sure that the fuel tank cap is
properly closed before riding.
WARNING
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.
WARNING
1
2
ZAUM0020
1. Filler tube
2. Fuel level
EAU00185
EC000008
Immediately wipe off spilled fuel with
a clean, dry, soft cloth, since fuel may
deteriorate painted surfaces or plas-
tic parts.
CAUTION:
EAU04206
Recommended fuel:
REGULAR UNLEADED
GASOLINE ONLY
Fuel tank capacity:
Total amount:
7 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.
WARNING
CAUTION:
3-7
ZAUM0289M
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.

INSTRUMENT AND CONTROL FUNCTIONS
3ZAUM0204
1
2
ZAUM0263
1. Storage compartment B
2. Oil tank cap
3-8
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
EAUM0082
2-stroke engine oil tank cap
The 2-stroke engine oil tank cap is
located in the storage compartment.
(See page 3-11 for storage
compartment opening and closing
procedures.)
1. To remove the 2-stroke engine oil
tank cap, pull it off.2. To install the 2-stroke engine oil
tank cap, push it into the oil tank
opening.
NOTE :
Make sure that the 2-stroke engine oil
tank cap is properly installed before
riding the scooter.

3
INSTRUMENT AND CONTROL FUNCTIONS
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.
1
ZAUM0264
1. Seat
3-9
EAU03839
Starter (choke) lever ""
Starting a cold engine requires a richer
air-fuel mixture, which is supplied by the
starter (choke).
•Move the lever in direction a to
turn on the starter (choke).
•Move the lever in direction b to
turn off the starter (choke).
1. Starter (choke) lever ""
a
b
1
ZAUM0293

PRE-OPERATION CHECKS
4
EAU03439
Pre-operation check list
ITEM CHECKS PAGE
• Check fuel level in fuel tank.
Fuel• Refuel if necessary. 3-5 — 3-6
• Check fuel line for leakage.
• Check oil level in oil tank.
Two-stroke engine oil• If necessary, add recommended oil to specified level. 3-8, 6-15
• Check vehicle for oil leakage.
Final transmission oil• Check vehicle for oil leakage. 6-7
• Check coolant level in reservoir.
Coolant• If necessary, add recommended coolant to specified level. 6-8
• Check cooling system for leakage.
• Check operation.
• If soft or spongy, have Yamaha dealer bleed hydraulic system.
Front brake• Check fluid level in reservoir. 3-5, 6-13 — 6-15
• If necessary, add recommended brake fluid to specified level.
• Check hydraulic system for leakage.
• Check operation.
• If soft or spongy, have Yamaha dealer bleed hydraulic system.
Rear brake• Check fluid level in reservoir. 3-5, 6-13 — 6-15
• If necessary, add recommended brake fluid to specified level.
• Check hydraulic system for leakage.
The condition of a vehicle is the owner’s responsibility. Vital components can start to deteriorate quickly and unexpectedly,
even if the vehicle remains unused (for example, as a result of exposure to the elements). Any damage, fluid leakage or
loss of tire air pressure could have serious consequences. Therefore, it is very important, in addition to a thorough visual
inspection, to check the following points before each ride.
4-1