2006 YAMAHA YFZ450 engine

8-37
Recommended engine oil:
See page 10-2.
Oil quantity:
Without oil filter element replacement:
Quantity in oil tank:
1.55 L
Quantity in crankcase:
0.20 L
Total amount:
1.75 L
With oil filter element replacement:
Quantity in oil tank:
1.55 L
Quantity in crankcase:
0.30 L
Total amount:
1.85 L
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8-39
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8In order to prevent clutch slippage (since
the engine oil also lubricates the clutch),
do not mix any chemical additives. Do not
use oils with a diesel specification of “CD”
or oils of a higher quality than specified. In
addition, do not use oils labeled “ENERGY
CONSERVING II” or higher.
8Make sure that no foreign material enters
the crankcase.
14. Start the engine, and then let it idle for sev-
eral minutes while checking it for oil leak-
age. If oil is leaking, immediately turn the
engine off and check for the cause.
15. Turn the engine off, and then check the oil
level and correct it if necessary.
16. Install the engine guard by installing the
bolts, and then tighten them to the speci-
fied torque.
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Be sure to apply LOCTITEto the engine
guard bolts before installing them.
Tightening torque:
Engine guard bolt:
7 Nm (0.7 m0kgf)
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EBU10151
Cooling system
1. Check the coolant level in the coolant
reservoir when the engine is cold as the
coolant level will vary with engine tempera-
ture.
NOTE:
The coolant should be between the minimum
and maximum level marks.
2. If the coolant is at or below the minimum
level mark, remove the coolant reservoir
cap, and then add coolant or distilled water
to raise it to the specified level.
cC
Hard water or salt water is harmful to the
engine. You may use soft water if you can’t
get distilled water.
Coolant reservoir capacity
(up to the maximum level mark):
0.25 L
1. Maximum level mark 2. Minimum level mark
3. Coolant reservoir 4. Coolant reservoir cap
1. Repère maximum 2. Repère minimum
3. Vase d’expansion
4. Bouchon du vase d’expansion
1. Marca de máximo 2. Marca de mínimo
3. Depósito de refrigerante
4. Tapa del depósito de refrigerante
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8-47
EBU14130
Changing the coolant
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Wait for the engine and radiator to cool
before removing the radiator cap. You could
be burned by hot fluid and steam blown out
under pressure. Always put a thick rag over
the cap when opening. Allow any remaining
pressure to escape before completely
removing the cap.
1. Place the ATV on a level surface.
2. Remove panel A. (See page 8-19 for panel
removal and installation procedures.)
3. Place a container under the engine, and
then remove the coolant drain bolt. (Use a
trough or a similar object as shown.)
4. Remove the radiator cap.
1. Coolant drain bolt (×2) 2. Trough1. Boulon de vidange du liquide de refroidissement (×2)
2. Feuille de papier pliée comme illustré
1. Perno de drenaje de refrigerante (×2)
2. Elemento de paso
1. Radiator cap
1. Bouchon de radiateur1. Tapa del radiador
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8-51
Recommended antifreeze:
High quality ethylene glycol antifreeze
containing corrosion inhibitors for
aluminum engines.
Antifreeze and water mixing ratio:
1:1
Total amount:
1.30 L
Coolant reservoir capacity
(up to the maximum level mark):
0.29 L
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Hard water or salt water is harmful to the
engine. You may use soft water if you cannot
get distilled water.
12. Install the radiator cap and the coolant
reservoir cap.
13. Start the engine and let it idle for several
minutes. Stop the engine, and then check
the coolant level in the radiator. If it is low,
add more coolant until it reaches the top of
the radiator.
14. Check the coolant level in the reservoir. If it
is low, add coolant to the maximum level
mark.
15. Start the engine and then check for coolant
leakage.
NOTE:
If any leakage is found, have a Yamaha dealer
check the cooling system.
16. Install the panel.
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EBU14142
Spark plug inspection
Removal
1. Remove the seat. (See page 4-27 for seat
removal and installation procedures.)
2. Remove the bolts and the quick fastener
screws.
3. Remove the fuel tank cap by turning it
counterclockwise.
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8Always turn off the engine when removing
the fuel tank cap.
8Do not remove the fuel tank cap immedi-
ately after the engine has been running
and is still very hot.
8Do not spill gasoline on the engine,
exhaust pipe or muffler.
8Never remove the fuel tank cap while
smoking, or in the vicinity of sparks, open
flames, or other sources of ignition such
as the pilot lights of water heaters and
clothes dryers.
1. Panel 2. Bolt (×2)
3. Quick fastener screw (×2) 4. Fuel tank cap
1. Cache 2. Boulon (×2)
3. Vis à serrage rapide (×2)
4. Bouchon du réservoir de carburant
1. Panel 2. Perno (×2)
3. Perno del fijador rápido (×2)
4. Tapón del depósito de combustible
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