2008 YAMAHA AEROX50 engine overheat

INSTRUMENT AND CONTROL FUNCTIONS
3-2
3
EAU11002
Indicator and warning lights
EAU11020
Turn signal indicator light “”
This indicator light flashes when the
turn signal switch is pushed to the left or
right.
EAU11080
High beam indicator light “”
This indicator light comes on when the
high beam of the headlight is switched
on.
EAU11180
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 warninglight comes on during operation, stop
immediately and fill the oil tank with Ya-
malube 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 en-
gine 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 en-
gine oil tank has been refilled, have a
Yamaha dealer check the electrical cir-cuit.CAUTION:
ECA10010
Do not operate the vehicle until you
know that the engine oil level is suf-ficient.
EAU11430
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.CAUTION:
ECA10020
Do not operate the engine if it isoverheated.
1. Turn signal indicator light “”
2. High beam indicator light “”
3. Oil level warning light “”
TEMP
123
ZAUM0254
1. Coolant temperature warning light “”
TEMP
Km / h
E1/2
F
1
ZAUM0255

OPERATION AND IMPORTANT RIDING POINTS
5-4
5
EAU16830
Engine break-in There is never a more important period
in the life of your engine than the period
between 0 and 1000 km (600 mi). For
this reason, you should read the follow-
ing material carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1000 km (600 mi). The various parts in
the engine wear and polish themselves
to the correct operating clearances.
During this period, prolonged full-throt-
tle operation or any condition that might
result in engine overheating must be
avoided.
EAUM2090
0–150 km (0–90 mi)
Avoid prolonged operation above 1/3
throttle. Vary the speed of the scooter
from time to time. Do not operate it at
one set throttle position.
150–500 km (90–300 mi)
Avoid prolonged operation above 1/2
throttle.
500–1000 km (300–600 mi)
Avoid cruising speeds in excess of 3/4
throttle.
CAUTION:
ECAM1070
After 1000 km (600 mi) of operation,
the final transmission oil must bechanged.
1000 km (600 mi) and beyond
Avoid prolonged full throttle operation.
Vary speeds occasionally.CAUTION:
ECA10270
If any engine trouble should occur
during the engine break-in period,
immediately have a Yamaha dealercheck the vehicle.
EAU17212
Parking When parking, stop the engine, and
then remove the key from the main
switch.
WARNING
EWA10310


Since the engine and exhaust
system can become very hot,
park in a place where pedestri-
ans or children are not likely to
touch them.


Do not park on a slope or on soft
ground, otherwise the vehiclemay overturn.
CAUTION:
ECA10380
Never park in an area where there
are fire hazards such as grass orother flammable materials.

PERIODIC MAINTENANCE AND MINOR REPAIR
6-24
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 hissingsound has stopped, press down on the cap while turning it counterclockwise, and then remove the cap.
NOTE:If coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended coolantas 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 NOTE.)
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.