fuel cap YAMAHA AEROX50 2004 Owners Manual

2
DESCRIPTION
Right view
910
14 11
1213
9. Throttle grip (page 6-11)
10. Front brake lever (page 3-5, 6-13, 6-16)
11. Coolant tank location (page 6-8)
12. Battery/fuse (page 6-18 - 6-20)
2-2
13. Oil tank cap location (page 3-8)
14. Fuel tank cap (page 3-5)

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
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
1
ZAUM0084
1
ZAUM0085
EAU02935*
Fuel tank cap
To open the fuel tank cap
Open the fuel tank cap lock cover, insert
the key into the lock, and then turn it 1/4
turn counterclockwise. The lock will be
released and the fuel tank cap can be
opened.
1
ZAUM0262
3-51. Fuel tank cap

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

SCOOTER CARE AND STORAGE
7 Long-term
Before storing your scooter for several
months:
1. Follow all the instructions in the
"Care" section of this chapter.
2. Drain the carburetor float chamber
by loosening the drain bolt; this will
prevent fuel deposits from building
up. Pour the drained fuel into the fuel
tank.
3. Fill up the fuel tank and add fuel
stabilizer (if available) to prevent the
fuel tank from rusting and the fuel
from deteriorating.
4. Perform the following steps to protect
the cylinder, piston rings, etc. from
corrosion.
a. Remove the spark plug cap
and spark plug.
b. Pour a teaspoonful of engine oil
into the spark plug bore.c. Install the spark plug cap onto
the spark plug, and then place
the spark plug on the cylinder
head so that the electrodes are
grounded. (This will limit
sparking during the next step.)
d. Turn the engine over several
times with the starter. (This will
coat the cylinder wall with oil.)
e. Remove the spark plug cap
from the spark plug, and then
install the spark plug and the
spark plug cap.
EWA00003
To prevent damage or injury from
sparking, make sure to ground the
spark plug electrodes while turning
the engine over.
5. Lubricate all control cables and
the pivoting points of all levers and
pedals as well as of the sidestand/
centerstand.6. Check and, if necessary, correct
the tire air pressure, and then lift
the scooter so that both of its
wheels are off the ground.
Alternatively, turn the wheels a
little every month in order to
prevent the tires from becoming
degraded in one spot.
7. Cover the muffler outlet with a
plastic bag to prevent moisture
from entering it.
8. Remove the battery and fully
charge it. Store it in a cool, dry
place and charge it once a month.
Do not store the battery in an
excessively cold or warm place
(less than 0 °C or more than 30
°C). For more information on
storing the battery, see page 6-19.
NOTE :
Make any necessary repairs before
storing the scooter.
WARNING
7-4

SPECIFICATIONS
8
Specifications
Model YQ50
Dimensions:
Overall length 1.743 mm
Overall width 690 mm
Overall height 1.170 mm
Seat height 828 mm
Wheelbase 1.256 mm
Minimum ground clearance 185 mm
Minimum turning radius 1.800 mm
Basic weight:97 kg
(with oil and full fuel tank)
Engine:
Engine type Liquid cooled, 2 stroke
Cylinder arrangement Single cylinder, horizontal
Displacement 49.2 cc
Bore x stroke 40.0 x 39.2
Compression ratio 7.44:1
Starting system Electric and kick starter
Lubrication systemSeparate lubrication (Autolube)
Engine oil:
Type Yamalube 2
or 2 stroke engine oil
Recommended engine oil Jaso FC
classification or ISO EG-C, EG-D
Capacity 1.3 LFinal transmission oil:
Type SAE 10W30 type SE
Quantity 0.13L
Cooling system capacity:1.2L
(total amount)
Air filter type:Wet type element
Fuel:
Recommended fuel Regular unleaded gasoline
(RON 91 mini)
Fuel tank capacity 7L
Carburetor:
Manufacturer DELL'ORTO
Model/quantity PHBN 12HS x1
Spark plug:
Manufacturer/Model NGK / BR8HS
Spark plug gap 0.5—0.7 mm
Clutch type:Dry, centrifugal automatic
Transmission:
Primary reduction system Helical gear
Primary reduction ratio 52/13 (4.000)
Secondary reduction system Spur gear
Secondary reduction ratio 43/14 (3.071)
Transmission type V-belt automatic
Operation Centrifugal automatic type
8-1