Yamaha wr450fb Owner's Manual page 59

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1. Radiator cap
TIP
The coolant should be at the bottom of
the radiator filler neck. The level will
change with variation of engine temper-
ature.
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1. Radiator filler neck
2. Correct coolant level
PERIODIC MAINTENANCE AND ADJUSTMENT
3. If the coolant is below the correct
coolant level, add coolant, and
then install the radiator cap.
NOTICE: If coolant is not avail-
able, 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 cool-
ant, replace it with coolant as
soon as possible, otherwise the
cooling system will not be pro-
tected against frost and corro-
sion. If water has been added to
the coolant, have a Yamaha
dealer check the antifreeze con-
tent of the coolant as soon as
possible, otherwise the effec-
tiveness of the coolant will be
reduced.
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To change the coolant
1. Place the vehicle on a level sur-
face and let the engine cool if nec-
essary.
2. Place a container under the engine
to collect the used coolant.
3. Remove the coolant drain bolt and
[ECA10472]
EAUM1315
7-13
its gasket, and then the radiator
cap to drain the cooling system.
WARNING! Never attempt to re-
move the radiator cap when the
engine is hot.
[EWA10381]
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1. Coolant drain bolt
2. Gasket
4. After the coolant is completely
drained, thoroughly flush the cool-
ing system with clean tap water.
5. Install the coolant drain bolt and its
new gasket, and then tighten the
bolt to the specified torque.
Tightening torque:
Coolant drain bolt:
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
6. Pour the recommended coolant
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