2012 YAMAHA YFZ450 oil

8-15
8
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 temperature of 40 ° C
(104 °F), let it continue to idle for ten seconds
or more, and then turn the engine off.
TIPTo 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 tem-
perature.3. Remove the engine oil tank filler cap, and then wipe the engine oil dipstick off with a clean
rag.
4. Insert the dipstick into the filler hole (without screwing it in), and then remove it again to
check the oil level.
TIPThe engine oil should be between the minimum
and maximum level marks.1. Engine oil tank filler cap
2. Engine oil dipstick
3. Engine oil tank
4. Crankcase engine oil filler cap
5. Maximum level mark
6. Minimum level mark
4
3
1
1
2
5
6
U1PD60E0.book Page 15 Monday, June 13, 2011 2:57 PM

8-16
85. If the engine oil is at or below the minimum
level mark, add sufficient oil of the recom-
mended type through the engine oil tank filler
hole to raise it to the correct level. NOTICE:
Be sure the engine oil is at the correct lev-
el, otherwise engine damage may result.
[ECB00851]
TIPWhen adding oil, be careful not to overfill the en-
gine oil tank; the oil level rises faster starting from
the half-level-portion on the dipstick.6. Insert the dipstick into the engine oil tank filler hole, and then tighten the engine oil tank filler
cap. NOTICE: Make sure that the engine oil
tank filler cap is securely tightened; other-
wise, oil may seep out when the engine is
running.
[ECB00362]
To change the engine oil (with or without oil fil-
ter element replacement) 1. Place the ATV on a level surface.
2. Remove the engine guard by removing the bolts. 3. Start the engine, warm it up for several min-
utes, and then turn it off.
4. Place an oil pan under the engine to collect the used oil.
5. Remove the crankcase engine oil filler cap, and the crankcase engine oil drain bolt and its
gasket.
1. Engine guard
2. Bolt
1
2
U1PD60E0.book Page 16 Monday, June 13, 2011 2:57 PM

8-17
8
6. Remove the engine oil tank filler cap, and the
engine oil tank drain bolt and its gasket. 7. Check the gaskets for damage, and replace if
necessary.
TIPSkip steps 8 –11 if the oil filter element is not being
replaced.8. Remove the oil filter element cover by remov- ing the bolts, and then remove the oil filter el-
ement.
1. Crankcase engine oil drain bolt
2. Gasket
12
1. Engine oil tank drain bolt
2. Gasket
12
U1PD60E0.book Page 17 Monday, June 13, 2011 2:57 PM

8-18
89. Check the O-rings for damage, and replace
them if necessary. 10. Install a new oil filter element and new O-
rings.
TIPMake sure that the O-rings are properly seated.11. Install the oil filter element cover by installingthe bolts, and then tighten them to the speci-
fied torque.
1. Oil filter element cover
2. Bolt
1
2
1. Oil filter element
2. O-ringTightening torque:
Oil filter element cover bolt:10 Nm (1.0 m ·kgf, 7.2 ft ·lbf)
1
2
2
U1PD60E0.book Page 18 Monday, June 13, 2011 2:57 PM

8-19
8
12. Install the crankcase engine oil drain bolt, the
engine oil tank drain bolt and their new gasket,
and then tighten the bolts to the specified
torques.
13. Refill with the specified amount of the recom- mended engine oil through the engine oil tank
filler hole, and then install and tighten the en-
gine oil tank filler cap.
14. Refill with the specified amount of the recom- mended engine oil through the crankcase en-
gine oil filler hole, and then install and tighten
the crankcase engine oil filler cap.
TIPBe sure to wipe off spilled oil on any parts after the
engine and exhaust system have cooled down.NOTICEECB00300
In 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
Tightening torques:
Crankcase engine oil drain bolt:20 Nm (2.0 m ·kgf, 14 ft ·lbf)
Engine oil tank drain bolt: 19 Nm (1.9 m ·kgf, 14 ft ·lbf)Recommended oil:
See page 10-1.
Oil quantity: Without oil filter element replacement:Quantity in oil tank: 1.55 L (1.64 US qt, 1.36 Imp.qt)
Quantity in crankcase: 0.20 L (0.21 US qt, 0.18 Imp.qt)
With oil filter element replacement: Quantity in oil tank: 1.55 L (1.64 US qt, 1.36 Imp.qt)
Quantity in crankcase: 0.30 L (0.32 US qt, 0.26 Imp.qt)
U1PD60E0.book Page 19 Monday, June 13, 2011 2:57 PM

8-20
8a higher quality than specified. In addition,
do not use oils labeled
“ENERGY CONSERV-
ING II” or higher.

Make sure that no foreign material enters the
crankcase.15. Start the engine, and then let it idle for several
minutes while checking it for oil leakage. If oil
is leaking, immediately turn the engine off and
check for the cause.
16. Turn the engine off, and then check the oil lev- el and correct it if necessary.
17. Install the engine guard by installing the bolts, and then tighten them to the specified torque.
NOTICE: Be sure to apply LOCTITE
® to the
engine guard bolts before installing them.
[ECB00371] EBU23470
Coolant The coolant level should be checked before each
ride. In addition, the coolant must be changed at
the intervals specified in the periodic maintenance
and lubrication chart.EBU27942To check the coolant level
1. Place the ATV on a level surface.TIPThe coolant level must be checked on a cold en-
gine since the level varies with engine tempera-
ture.2. Check the coolant level in the coolant reser- voir.TIPThe coolant should be between the minimum and
maximum level marks.
Tightening torque:Engine guard bolt:7 Nm (0.7 m ·kgf, 5.1 ft ·lbf)
U1PD60E0.book Page 20 Monday, June 13, 2011 2:57 PM

8-26
88. Wash the sponge material gently but thor-
oughly in solvent. WARNING! Always use
parts cleaning solvent to clean the sponge
material. Never use low-flash-point sol-
vents or gasoline to clean the sponge ma-
terial because the engine could catch fire
or explode.
[EWB01941]
9. Squeeze the excess solvent out of the sponge material and let it dry. NOTICE: Do not twist
the sponge material when squeezing it.
[ECB00441]
10. Check the sponge material and replace it if damaged.
11. Apply Yamaha foam air filter oil or other qual- ity foam air filter oil to the sponge material.TIPThe sponge material should be wet but not drip-
ping.12. Pull the sponge material over the air filter ele-ment frame.
13. Apply all-purpose grease to the air filter ele- ment seat.
1. Sponge material
2. Air filter element frame
1
2
U1PD60E0.book Page 26 Monday, June 13, 2011 2:57 PM

8-35
8
5. Install the brake fluid reservoir bracket bolt.
6. Install the seat.
WARNING
EWB02720Improper maintenance can result in loss of
braking ability. Observe these precautions:

Insufficient brake fluid may allow air to enter
the brake system, reducing braking perfor-
mance.
Clean the filler cap before removing. Use
only DOT 4 brake fluid from a sealed contain-
er.
Use only the specified brake fluid; otherwise,
the rubber seals may deteriorate, causing
leakage.
Refill with the same type of brake fluid. Add-
ing a brake fluid other than DOT 4 may result
in a harmful chemical reaction.
Be careful that water does not enter the
brake fluid reservoir when refilling. Water
will significantly lower the boiling point of
the fluid and may result in vapor lock.NOTICEECB01160Brake fluid may damage painted surfaces or
plastic parts. Always clean up spilled fluid im-
mediately.As the brake pads wear, it is normal for the brake
fluid level to gradually go down. A low brake fluid
level may indicate worn brake pads and/or brake
system leakage; therefore, be sure to check the
1. Frame
2. Projection
3. Brake fluid reservoir bracket
4. BoltSpecified brake fluid:
DOT 4
2 3
1 4
U1PD60E0.book Page 35 Monday, June 13, 2011 2:57 PM