engine YAMAHA AEROX50 2018 Owner's Guide

Periodic maintenance and adjustment
6-30
6 Engine overheating
WARNING
EWAT1041
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.
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 cool-
ant 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.
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Scooter care and storage
7-1
7
EAU37834
Matte color cautionNOTICE
ECA15193
Some models are equipped with
matte colored finished parts. Be
sure to consult a Yamaha dealer for
advice on what products to use be-
fore cleaning the vehicle. Using a
brush, harsh chemical products or
cleaning compounds when cleaning
these parts will scratch or damage
their surface. Wax also should not
be applied to any matte colored fin-
ished parts.
EAU26096
CareWhile the open design of a scooter re-
veals the attractiveness of the technol-
ogy, it also makes it more vulnerable.
Rust and corrosion can develop even if
high-quality components are used. A
rusty exhaust pipe may go unnoticed
on a car, however, it detracts from the
overall appearance of a scooter. Fre-
quent and proper care does not only
comply with the terms of the warranty,
but it will also keep your scooter look-
ing good, extend its life and optimize
its performance.
Before cleaning
1. Cover the muffler outlet with a
plastic bag after the engine has
cooled down.
2. Make sure that all caps and cov-
ers as well as all electrical cou-
plers and connectors, including
the spark plug cap, are tightly in-
stalled.
3. Remove extremely stubborn dirt,
like oil burnt onto the crankcase,
with a degreasing agent and a
brush, but never apply such prod-ucts onto seals, gaskets and
wheel axles. Always rinse the dirt
and degreaser off with water.
Cleaning
NOTICE
ECA10784
Avoid using strong acidic wheel
cleaners, especially on spoked
wheels. If such products are
used on hard-to-remove dirt, do
not leave the cleaner on the af-
fected area any longer than in-
structed. Also, thoroughly rinse
the area off with water, immedi-
ately dry it, and then apply a cor-
rosion protection spray.
Improper cleaning can damage
plastic parts (such as cowlings,
panels, windshields, headlight
lenses, meter lenses, etc.) and
the mufflers. Use only a soft,
clean cloth or sponge with wa-
ter to clean plastic. However, if
the plastic parts cannot be thor-
oughly cleaned with water, di-
luted mild detergent with water
may be used. Be sure to rinse
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Scooter care and storage
7-4
7
EAU36564
StorageShort-term
Always store your scooter in a cool, dry
place and, if necessary, protect it
against dust with a porous cover. Be
sure the engine and the exhaust sys-
tem are cool before covering the
scooter.NOTICE
ECA10821
Storing the scooter in a poorly
ventilated room or covering it
with a tarp, while it is still wet,
will allow water and humidity to
seep in and cause rust.
To prevent corrosion, avoid
damp cellars, stables (because
of the presence of ammonia)
and areas where strong chemi-
cals are stored.Long-term
Before storing your scooter for several
months:
1. Follow all the instructions in the
“Care” section of this chapter.2. Fill up the fuel tank and add fuel
stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating.
3. 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 spark-
ing 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. WARNING! To
prevent damage or injury
from sparking, make sure to
ground the spark plug elec-
trodes while turning the en-
gine over.
[EWA10952]
4. Lubricate all control cables and
the pivoting points of all levers and
pedals as well as of the side-
stand/centerstand.
5. Check and, if necessary, correct
the tire air pressure, and then lift
the scooter so that both of its
wheels are off the ground. Alterna-
tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.
6. Cover the muffler outlet with a
plastic bag to prevent moisture
from entering it.
7. 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 ex-
cessively cold or warm place [less
than 0 °C (30 °F) or more than 30
°C (90 °F)]. For more information
on storing the battery, see page
6-23.TIPMake any necessary repairs before
storing the scooter.
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Specifications
8-1
8
Dimensions:Overall length:
1870 mm (73.6 in)
Overall width:
700 mm (27.6 in)
Overall height:
1155 mm (45.5 in)
Seat height:
815 mm (32.1 in)
Wheelbase:
1275 mm (50.2 in)
Ground clearance:
130 mm (5.12 in)
Minimum turning radius:
2.0 m (6.56 ft)Weight:Curb weight:
101 kg (223 lb)Engine:Combustion cycle:
4-stroke
Cooling system:
Liquid cooled
Valve train:
SOHC
Number of cylinders:
Single cylinder
Displacement:
49 cm³
Bore × stroke:
38.0 × 43.5 mm (1.50 × 1.71 in)
Compression ratio:
12.0 : 1Starting system:
Electric starter and kickstarter
Lubrication system:
Wet sump
Engine oil:Recommended brand:
YAMALUBE
Type:
SAE 10W-40
Recommended engine oil grade:
API service SG type or higher, JASO
standard MA
Engine oil quantity:
Periodic oil change:
0.78 L (0.82 US qt, 0.69 Imp.qt)Final transmission oil:Type:
SAE 10W-30 type SE motor oil
Quantity:
0.10 L (0.11 US qt, 0.09 Imp.qt)Coolant quantity:Coolant reservoir (up to the maximum level
mark):
0.26 L (0.27 US qt, 0.23 Imp.qt)
Radiator (including all routes):
0.52 L (0.55 US qt, 0.46 Imp.qt)Air filter:Air filter element:
Oil-coated paper elementFuel:Recommended fuel:
Premium unleaded gasoline (Gasohol (E10)
acceptable)Fuel tank capacity:
6.0 L (1.58 US gal, 1.32 Imp.gal)
Fuel reserve amount:
1.0 L (0.26 US gal, 0.22 Imp.gal)
Fuel injection:Throttle body:
ID mark:
10BKSpark plug(s):Manufacturer/model:
NGK/CR7E
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)Clutch:Clutch type:
Dry, centrifugal, shoeDrivetrain:Primary reduction ratio:
1
Final drive:
Gear
Secondary reduction ratio:
52/13 × 44/12 (14.666)
Transmission type:
V-belt automatic
Operation:
Centrifugal automatic typeChassis:Frame type:
Underbone
Caster angle:
27.0 °
Trail:
85 mm (3.3 in)
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Specifications
8-3
8
Turn signal indicator light:
LED
Fuel level warning light:
LED
Coolant temperature warning light:
LED
Engine trouble warning light:
LEDFuse(s):Main fuse:
15.0 A
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Consumer information
9-2
9
EAU69910
Diagnostic connectorThe diagnostic connector is located as
shown.
EAU85300
Vehicle data recordingThis model’s ECU stores certain vehi-
cle data to assist in the diagnosis of
malfunctions and for research, statisti-
cal analysis and development purpos-
es.
Although the sensors and recorded
data will vary by model, the main data
points are: Vehicle status and engine perfor-
mance data
 Fuel-injection and emission-relat-
ed data
This data will be uploaded only when a
special Yamaha diagnostic tool is at-
tached to the vehicle, such as when
maintenance checks or service proce-
dures are performed.
Vehicle data uploaded will be handled
appropriately according to the follow-
ing Privacy Policy.
Privacy Policy Yamaha will not disclose this data to a
third party except in the following cas-
es. In addition, Yamaha may provide
vehicle data to a contractor in order to
outsource services related to the han-
dling of vehicle data. Even in this case,
Yamaha will require the contractor to properly handle the vehicle data we
provided and Yamaha will appropriate-
ly manage the data.  With the consent of the vehicle
owner
 Where obligated by law
 For use by Yamaha in litigation
 When the data is not related to an
individual vehicle nor owner
1. Diagnostic connectorZAUM1554
1
https://www.yamaha-motor.eu/eu/
privacy/privacy-policy.aspx
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10-1
10
Index
AAcceleration and deceleration ................ 5-2
Air filter element and check hose,
replacing and cleaning ....................... 6-13
Auxiliary light bulb, replacing ............... 6-26BBattery .................................................. 6-23
Brake fluid, changing............................ 6-19
Brake fluid level, checking.................... 6-18
Brake lever, front .................................... 3-7
Brake lever, rear ..................................... 3-7
Brake levers, lubricating ....................... 6-20
Braking ................................................... 5-3CCables, checking and lubricating ......... 6-19
Care ........................................................ 7-1
Catalytic converter ............................... 3-10
Centerstand, checking and
lubricating........................................... 6-21
Coolant ................................................. 6-12
Coolant temperature warning light ......... 3-2
Cowling and panel, removing and
installing ............................................... 6-6DData recording, vehicle........................... 9-2
Diagnostic connector ............................. 9-2
Dimmer switch........................................ 3-6EEngine break-in ...................................... 5-4
Engine oil ................................................ 6-9
Engine trouble warning light ................... 3-3FFinal transmission oil ............................ 6-11Front and rear brake lever free play,
checking ............................................ 6-17
Front and rear brake pads, checking ... 6-17
Front fork, checking ............................. 6-21
Fuel ........................................................ 3-8
Fuel consumption, tips for reducing ...... 5-3
Fuel level warning light........................... 3-2
Fuel tank cap.......................................... 3-7
Fuse, replacing..................................... 6-24
HHandlebar switches ............................... 3-6
Headlight bulb, replacing ..................... 6-25
High beam indicator light ....................... 3-2
Horn switch ............................................ 3-6IIdentification numbers ........................... 9-1
Indicator lights and warning lights ......... 3-2KKickstarter ............................................ 3-10LLicense plate light ................................ 6-28MMain switch/steering lock ...................... 3-1
Maintenance and lubrication, periodic... 6-3
Maintenance, emission control
system ................................................. 6-2
Matte color, caution ............................... 7-1
Model label............................................. 9-1
Multi-function display............................. 3-3PParking ................................................... 5-4
Part locations ......................................... 2-1SSafe-riding points................................... 1-5Safety information................................... 1-1
Seats ..................................................... 3-11
Spark plug, checking .............................. 6-7
Specifications ......................................... 8-1
Starting a cold engine............................. 5-1
Starting off .............................................. 5-2
Start switch ............................................. 3-6
Steering, checking ................................ 6-22
Storage ................................................... 7-4
Storage compartment........................... 3-12
TTail/brake light bulb, replacing ............. 6-27
Throttle grip and cable, checking and
lubricating ........................................... 6-20
Throttle grip free play, checking ........... 6-14
Tires ...................................................... 6-15
Troubleshooting .................................... 6-28
Troubleshooting charts ......................... 6-29
Turn signal indicator light ....................... 3-2
Turn signal light bulb, replacing............ 6-27
Turn signal switch ................................... 3-6VValve clearance..................................... 6-14
Vehicle identification number ................. 9-1WWheel bearings, checking .................... 6-22
Wheels .................................................. 6-16
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