2013 YAMAHA AEROX50 radiator

INSTRUMENT AND CONTROL FUNCTIONS
3-3
3
TIPIf the warning light does not come on
when the key is in the “ ” position or
does not go off after the 2-stroke en-
gine oil tank has been refilled, have a
Yamaha dealer check the electrical cir-
cuit.NOTICE
ECA16291
Do not operate the vehicle until you
know that the engine oil level is suf-
ficient.
EAUM2791
Fuel level warning light “ ”
This warning light comes on when the
fuel level drops below approximately
1.0 L (0.26 US gal, 0.22 Imp.gal). When
this occurs, refuel as soon as possible.
The electrical circuit of the warning light
can be checked by turning the key
to “ ”. The warning light should come
on for a few seconds, and then go off.
If the warning light does not come on
initially when the key is turned to “ ”,
or if the warning light remains on, have
a Yamaha dealer check the electrical
circuit.
EAUM2781
Coolant temperature warning
light “ ”
This warning light comes on if the en-
gine overheats. If this occurs, stop the
engine immediately and allow the en-
gine to cool.
The electrical circuit of the warning light
can be checked by turning the key
to “ ”. The warning light should come
on for a few seconds, and then go off.
If the warning light does not come on
initially when the key is turned to “ ”,
or if the warning light remains on, have
a Yamaha dealer check the electrical
circuit.NOTICE
ECA10021
Do not continue to operate the en-
gine if it is overheating.TIP●
For radiator-fan-equipped vehi-
cles, the radiator fan(s) automati-
cally switch on or off according to
the coolant temperature in the ra-
diator.
●
If the engine overheats, see page
6-27 for further instructions.
EAUM1590
Speedometer unit (NS50N)The speedometer unit is equipped with
a speedometer, an odometer and a fuel
meter. The speedometer shows riding
speed. The odometer shows the total
distance traveled. The fuel meter indi-
cates the amount of fuel in the fuel tank.
(See page 3-2 for an explanation of the
fuel level warning light.)1. Speedometer
2. Odometer
3. Fuel meterZAUM0910
1
2
3
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-9
6
EAU20070
Coolant The coolant level should be checked
before each ride. In addition, the cool-
ant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAUM2102
To check the coolant level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.TIP●
The coolant level must be checked
on a cold engine since the level
varies with engine temperature.
●
Make sure that the vehicle is posi-
tioned straight up when checking
the coolant level. A slight tilt to the
side can result in a false reading.
2. Check the coolant level through
the check window.TIPThe coolant should be between the
minimum and maximum level marks.
3. If the coolant is at or below the
minimum level mark, remove the
cowling A. (See page 6-6.)
4. Open the reservoir cap, and then
add coolant to the maximum level
mark. WARNING! Remove only
the coolant reservoir cap. Never
attempt to remove the radiator
cap when the engine is hot.
[EWA15161]
NOTICE: If coolant is not
available, use distilled water or
soft tap water instead. Do not
use hard water or salt water
since it is harmful to the engine.
If water has been used instead
of coolant, replace it with cool-
ant as soon as possible, other-wise the cooling system will not
be protected against frost and
corrosion. If water has been
added to the coolant, have a
Yamaha dealer check the anti-
freeze content of the coolant as
soon as possible, otherwise the
effectiveness of the coolant will
be reduced.
[ECA10472]
5. Close the reservoir cap, and then
install the cowling.
1. Maximum level mark
2. Minimum level mark
1
2
ZAUM0591
1. Coolant reservoir cap
Coolant reservoir capacity:
0.25 L (0.26 US qt, 0.22 Imp.qt)1ZAUM0274
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-10
6
EAU33031
Changing the coolant
The coolant must be changed at the in-
tervals specified in the periodic mainte-
nance and lubrication chart. Have a
Yamaha dealer change the coolant.
WARNING! Never attempt to remove
the radiator cap when the engine is
hot.
[EWA10381]EAUM1642
Cleaning the air filter element The air filter element should be cleaned
at the intervals specified in the periodic
maintenance and lubrication chart.
Clean the air filter element more fre-
quently if you are riding in unusually
wet or dusty areas.
1. Remove the air filter case cover by
removing the screws.
2. Pull the air filter element out, clean
it with solvent, and then squeeze
the remaining solvent out.
WARNING! Use only a dedicat-
ed parts cleaning solvent. To
avoid the risk of fire or explo-
sion, do not use gasoline or sol-
vents with a low flash point.
[EWA10431]
NOTICE: To avoid dam-
aging the foam material, handle
it gently and carefully, and do
not twist or wring it.
[ECA10511]
3. Apply oil of the recommended type
to the entire surface of the ele-
ment, and then squeeze the ex-
cess oil out.
1. Screw
1
ZAUM0275
1. Air filter element
1ZAUM02761
4 32ZAUM0156
U1PHE0E0.book Page 10 Wednesday, August 29, 2012 4:42 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-27
6 Engine overheating
WARNING
EWA10400
●
Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be
blown out under pressure, which could cause serious injury. Be sure to wait until the engine has cooled.
●
After removing the radiator cap retaining bolt, place a thick rag, like a towel, over the radiator cap, and then
slowly rotate the cap counterclockwise to the detent to allow any residual pressure to escape. When the hissing
sound has stopped, press down on the cap while turning it counterclockwise, and then remove the cap.
TIPIf coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended coolant
as soon as possible.
Wait until the
engine has cooled.
Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer checkand repair the cooling system.Add coolant. (See TIP.)
Start the engine. If the engine overheats again,
have a
Yamaha dealer check
and repair the cooling system.
There is
leakage.
There is
no leakage.
U1PHE0E0.book Page 27 Wednesday, August 29, 2012 4:42 PM

SPECIFICATIONS
8-1
8
Dimensions:Overall length:
1870 mm (73.6 in)
Overall width:
NS50 700 mm (27.6 in)
NS50N 725 mm (28.5 in)
Overall height:
NS50 1155 mm (45.5 in)
NS50N 1115 mm (43.9 in)
Seat height:
815/930 mm (32.1/36.6 in)
Wheelbase:
1275 mm (50.2 in)
Ground clearance:
130 mm (5.12 in)
Minimum turning radius:
2000 mm (78.7 in)Weight:Curb weight:
97 kg (214 lb)Engine:Engine type:
Liquid cooled 2-stroke
Cylinder arrangement:
Single cylinder
Displacement:
49 cm³
Bore × stroke:
40.0 × 39.2 mm (1.57 × 1.54 in)
Compression ratio:
11.50–12.50 : 1
Starting system:
Electric starter and kickstarterLubrication system:
Separate lubrication (Yamaha autolube)
Engine oil:Type:
YAMALUBE 2S or 2-stroke engine oil
(JASO FC grade) or (ISO EG-C or EG-D
grade)
Engine oil quantity:
Quantity:
1.40 L (1.48 US qt, 1.23 Imp.qt)Final transmission oil:Type:
SAE 10W-30 type SE motor oil
Quantity:
0.11 L (0.12 US qt, 0.10 Imp.qt)Cooling system:Coolant reservoir capacity (up to the
maximum level mark):
0.25 L (0.26 US qt, 0.22 Imp.qt)
Radiator capacity (including all routes):
1.20 L (1.27 US qt, 1.06 Imp.qt)Air filter:Air filter element:
Wet elementFuel:Recommended fuel:
Premium unleaded gasoline only
Fuel tank capacity:
7.0 L (1.85 US gal, 1.54 Imp.gal)
Fuel reserve amount:
1.0 L (0.26 US gal, 0.22 Imp.gal)Carburetor:Type × quantity:
PHVA 12 ZS x 1
Spark plug(s):Manufacturer/model:
NGK/BR8HS
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)Clutch:Clutch type:
Dry, centrifugal automaticTransmission:Primary reduction ratio:
1
Final drive:
Gear
Secondary reduction ratio:
52/13 × 43/14 (12.286)
Transmission type:
V-belt automatic
Operation:
Centrifugal automatic typeChassis:Frame type:
Underbone
Caster angle:
27.00 °
Trail:
87 mm (3.4 in)Front tire:Type:
Tubeless
Size:
120/70-13 53P(Michelin)
53L(SAVA,Metzeler)
Manufacturer/model:
MICHELIN/POWER PURE SC
U1PHE0E0.book Page 1 Wednesday, August 29, 2012 4:42 PM