2006 YAMAHA YFZ450 check engine

8-7
EBU02622
PERIODIC MAINTENANCE/LUBRICATION
NOTE:8For ATVs not equipped with an odometer or an hour meter, follow the month maintenance intervals.
8For ATVs equipped with an odometer or an hour meter, follow the km (mi) or hours maintenance intervals. However, keep in mind
that if the ATV isn’t used for a long period of time, the month maintenance intervals should be followed.
8Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technical skills.
INITIAL EVERY
month 1 3 6 6 12
ITEM ROUTINEWhichever
km 320 1200 2400 2400 4800 comes first
(mi) (200) (750) (1500) (1500) (3000)
hours 20 75 150 150 300
Fuel line*9Check fuel hose for cracks or damage.
222
9Replace if necessary.
9Check condition.
Spark plug9Adjust gap and clean.22222
9Replace if necessary.
Valves*9Check valve clearance.
2 222
9Adjust if necessary.
Carburetor*9Check starter (choke) operation.
2222
9Adjust engine idle speed.
Crankcase breather9Check breather hose for cracks or damage.
222
system*9Replace if necessary.
9Check for leakage.
Exhaust system*9Tighten if necessary.222
9Replace gasket if necessary.
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8-9
INITIAL EVERY
month 1 3 6 6 12
ITEM ROUTINEWhichever
km 320 1200 2400 2400 4800 comes first
(mi) (200) (750) (1500) (1500) (3000)
hours 20 75 150 150 300
9Check operation.
Steering system*9Repair if damaged.
22222
9Check toe-in.
9Adjust if necessary.
Engine oil9Replace (Warm engine before draining).2 222
Engine oil filter
9Replace.222
element
9Check coolant leakage.
Cooling system9Repair if necessary.22222
9Replace coolant every 24 months.
9Check operation.
Lights and switches*
9
Adjust headlight beams.22222
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8-25
EBU13932
Engine oil and oil filter element
The engine oil level should be checked before
each ride. In addition, the oil must be changed
and the oil filter element replaced at the intervals
specified in the periodic maintenance and lubri-
cation chart.
To check the engine oil level
1. Place the ATV on a level surface.
2. Start the engine, warm it up until the
engine oil has reached a normal tempera-
ture of 40 ° C, let it continue to idle for ten
seconds or more, and then turn the engine
off.
NOTE:
To achieve the proper engine oil temperature for
an accurate oil level reading, the engine must
have first completely cooled down, and then
warmed up again for several minutes to normal
operating temperature.
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8-27
3. Remove the engine oil tank filler cap, wipe
the dipstick clean with a clean rag, insert it
back into the filler hole (without screwing it
in), and then remove it again to check the
oil level.
NOTE:
The engine oil should be between the minimum
and maximum level marks.
4. If the engine oil is below the minimum level
mark, add sufficient oil of the recommend-
ed type through the engine oil tank filler
hole to raise it to the correct level.
NOTE:
When adding oil, be careful not to overfill the
engine oil tank; the oil level rises faster starting
from the half-level-portion on the dipstick.
5. Insert the dipstick into the engine oil tank
filler hole, and then tighten the engine oil
tank filler cap.
1. Engine oil tank 2. Engine oil tank filler cap
3. Dipstick 4. Maximum level mark
5. Minimum level mark 6. Engine oil filler cap
1. Réservoir d’huile de moteur
2. Bouchon de remplissage de l’huile de moteur
3. Jauge
4. Repère de niveau maximum
5. Repère de niveau minimum
6. Bouchon de remplissage d’huile de moteur
1. Depósito de aceite de motor
2. Tapa de relleno del depósito de aceite de motor
3. Varilla de medición
4. Marca de nivel máximo
5. Marca de nivel mínimo
6. Tapa del filtro de aceite de motor
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8-31
4. Remove the engine oil filler cap and the
crankcase engine oil drain bolt.
5. Remove the engine oil tank filler cap and
the engine oil tank drain bolt.
6. Check the washers for damage, and
replace if necessary.
1. Crankcase engine oil drain bolt1. Boulon de vidange d’huile du carter1. Perno de drenaje de aceite de motor del cárter
1. Engine oil tank drain bolt
1. Boulon de vidange du réservoir d’huile1. Perno de drenaje del depósito aceite de motor
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8-39
cC
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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8-43
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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8-53
cC
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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