2005 YAMAHA VERSITY 300 engine overheat

INSTRUMENT AND CONTROL FUNCTIONS
3-3
3
EAUM1470
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 remaining fuel in
the tank reaches approximately 1.9 L
(0.50 US gal) (0.42 Imp.gal), the fuel
level warning light will come on and the
multi-function display will automatically
change to the “Trip/fuel” mode. (See
page 3-4.) If this occurs, refuel as soon
as possible.NOTE:Do not allow the fuel tank to empty itselfcompletely.
EAUM1101
Battery voltage/coolant
temperature gauge When the key is turned to “”, this
gauge indicates the battery voltage lev-
el before the engine was stopped.NOTE:If the needle drops to the “9V” (low)
mark, have a Yamaha dealer check thebattery.
When the key is turned to “”, this
gauge indicates the coolant tempera-
ture. If the needle reaches the red
zone, stop the scooter and allow the
engine to cool. (See page 6-31.)
CAUTION:
ECA10020
Do not operate the engine if it isoverheated.
1. Fuel gauge
2. Fuel level warning light
1
2
ZAUM0403
1. High level
2. Low level
1
2
ZAUM0579
1. Red zone
1
ZAUM0580

OPERATION AND IMPORTANT RIDING POINTS
5-3
5


Keep in mind that braking on a
wet road is much more difficult.


Ride slowly down a hill, as brak-
ing downhill can be very diffi-cult.
EAU16820
Tips for reducing fuel
consumption Fuel consumption depends largely on
your riding style. Consider the following
tips to reduce fuel consumption:

Avoid high engine speeds during
acceleration.


Avoid high engine speeds with no
load on the engine.


Turn the engine off instead of let-
ting it idle for an extended length of
time (e.g., in traffic jams, at traffic
lights or at railroad crossings).
EAU16841
Engine break-in There is never a more important period
in the life of your engine than the period
between 0 and 1600 km (1000 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
1600 km (1000 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.
EAUM2010
0–1000 km (0–600 mi)
Avoid prolonged operation above 1/3
throttle.
1000–1600 km (600–1000 mi)
Avoid prolonged operation above 1/2
throttle.

PERIODIC MAINTENANCE AND MINOR REPAIR
6-14
6 4. Install the battery cover.
CAUTION:
ECA10470


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 engine may not besufficiently cooled and the cool-
ing system will not be protected
against frost and corrosion.


If water has been added to the
coolant, have a Yamaha dealer
check the antifreeze content of
the coolant as soon as possible,
otherwise the effectiveness ofthe coolant will be reduced.
NOTE:

The radiator fan is automatically
switched on or off according to the
coolant temperature in the radia-
tor.


If the engine overheats, see page6-31 for further instructions.
EAU33030
Changing the coolant
WARNING
EWA10380
Never attempt to remove the radiatorcap when the engine is hot.
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.
EAUM2030
Air filter and V-belt case air
filter elements The air filter and V-belt case air filter el-
ements should be cleaned at the inter-
vals specified in the periodic
maintenance and lubrication chart.
Clean both filter elements more fre-
quently if you are riding in unusually
wet or dusty areas.CAUTION:
ECA10530


Make sure that each filter ele-
ment is properly seated in its
case.


The engine should never be op-
erated without the filter ele-
ments installed, otherwise the
piston(s) and/or cylinder(s) maybecome excessively worn.
Cleaning the air filter element
1. Place the scooter on the center-
stand.
2. Remove the air filter case cover by
removing the screws.
1. Coolant reservoir capCoolant reservoir capacity (up to the
maximum level mark):
0.40 L (0.42 US qt) (0.35 Imp.qt)
1
ZAUM0445

PERIODIC MAINTENANCE AND MINOR REPAIR
6-32
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.