engine YAMAHA YFZ450 2005 Notices Demploi (in French)

5-11 1. Fuel tank filler tube
2. Fuel level
1. Tube de remplissage du réservoir de carburant
2. Niveau de carburant
1. Tubo de llenado del depósito de combustible
2. Nivel de combustible
WARNING
_

Do not overfill the fuel tank. Fuel expands
when it heats up. If the fuel tank is over-
filled, fuel could spill out due to heat from
the engine or the sun.


Be careful not to spill fuel, especially on
the engine or exhaust pipe which can
cause a fire and severe injury. Wipe up any
spilled fuel immediately.


Do not refuel right after the engine has
been running and is still very hot.


Be sure the fuel tank cap is closed secure-
ly.
_
U5TG61.book Page 11 Friday, April 2, 2004 11:28 AM

5-13
EBU10842
Engine oil
Make sure the engine oil is at the specified level.
Add oil as necessary. (See page 8-23.)CAUTION:_

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 a higher quality than specified. In
addition, do not use oils labeled “ENERGY
CONSERVING II” or higher.


Make sure that no foreign material enters
the crankcase.
_
Recommended engine oil type and quantity:
See page 10-2.
U5TG61.book Page 13 Friday, April 2, 2004 11:28 AM

5-15
EBU13160
Coolant
Check the coolant level in the coolant reservoir
when the engine is cold. (The coolant level will
vary with engine temperature.) The coolant level is
satisfactory if it is between the minimum and max-
imum level marks on the coolant reservoir. If the
coolant level is at or below the minimum level
mark, add distilled water to bring the level up to the
maximum level mark. Change the coolant every
two years. (See pages 8-41–8-51 for details.)CAUTION:_ Hard water or salt water is harmful to the en-
gine. You may use soft water if you cannot get
distilled water. _
Coolant reservoir capacity
(up to the maximum level mark):
0.29 L
U5TG61.book Page 15 Friday, April 2, 2004 11:28 AM

5-17
WARNING
_ 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. _
EBU04980
Chain
Check the general condition of the chain and
check the chain slack before every ride. Lubricate
and adjust the chain as necessary. (See pages
8-101–8-109 for details.)
EBU10830
Throttle lever
Check to see that the throttle lever operates cor-
rectly. It must open smoothly and spring back to
the idle position when released. Have a Yamaha
dealer repair as necessary for proper operation.
U5TG61.book Page 17 Friday, April 2, 2004 11:28 AM

6-3
EBU14120
Starting a cold engine
WARNING
_ Always make sure all control cables work
smoothly before you begin riding in cold
weather. If the control cables are frozen or do
not work smoothly, you could be unable to
control the ATV, which could lead to an acci-
dent or collision. _1. Apply the parking brake.
2. Turn the fuel cock to “ON”.
3. Turn the main switch to “ON” and the engine
stop switch to “RUN”.
4. Shift the transmission into neutral.
U5TG61.book Page 3 Friday, April 2, 2004 11:28 AM

6-5 1. Fully open 2. Half open
3. Closed a. Starter (choke)
1. Complètement ouvert 2. Mi- ouvert
3. Ferméa. Starter (enrichisseur)
1. Abre completamente 2. Semiabierto
3. Cerrado a. Arrancador (estrangulador)
NOTE:_ This model is equipped with an ignition circuit cut-
off system. The engine can be started under the
following conditions.

When the transmission is in neutral. At this
time the neutral indicator light should come
on. If the light does not come on, ask a
Yamaha dealer to inspect it.


When the clutch is disengaged with the trans-
mission in any position. However, it is recom-
mended to shift into neutral before starting
the engine.
_5. Use the starter (choke) in reference to the fig-
ure:
Position
1: Cold engine start-
ambient temperature below 5 °C.
Position
2: Cold engine start-
ambient temperature at 0 °C – 30°C
and warming up position.
Position
3: Cold engine start-
ambient temperature above 25°C
and warm engine start position.
U5TG61.book Page 5 Friday, April 2, 2004 11:28 AM

6-7
6. Completely close the throttle lever and start
the engine by pushing the start switch.NOTE:_ If the engine fails to start, release the start switch,
then push it again. Pause a few seconds before
the next attempt. Each cranking should be as short
as possible to preserve battery energy. Do not
crank the engine more than 10 seconds on each
attempt. _7. If the engine is started with the starter (choke)
in position
1, the starter (choke) should be
returned to position
2 to warm up the en-
gine. If the engine is started with the starter
(choke) in position
2, keep the starter
(choke) in this position to warm up the en-
gine.
8. Continue warming up the engine until it idles
smoothly and return the starter (choke) to po-
sition
3 before riding.CAUTION:_ See the “Engine break-in” section prior to op-
erating the engine for the first time. _
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6-9
EBU01800
Starting a warm engine
To start a warm engine, refer to the “Starting a cold
engine” section. The starter (choke) should not be
used. The throttle should be opened slightly.
EBU01820
Warming up
To get maximum engine life, always warm up the
engine before starting off. Never accelerate hard
with a cold engine! To see whether or not the en-
gine is warm, check if it responds to the throttle
normally with the starter (choke) turned off.
U5TG61.book Page 9 Friday, April 2, 2004 11:28 AM

6-11 1. Shift pedal N. Neutral position
1. Pédale de sélection N. Point mort
1. Pedal de cambios N. Posición de punto muerto
EBU01981
Shifting
This model has a 5-speed forward transmission.
The transmission allows you to control the amount
of power you have available at a given speed or for
starting, accelerating, climbing hills, etc. To shift
into neutral, return the throttle lever to its original
position, apply the clutch and repeatedly depress
the shift pedal until it stops. When it stops, it will be
in first gear. Raise the pedal slightly to neutral.CAUTION:_

Do not coast for long periods with the en-
gine off, and do not tow the machine a long
distance. Even in neutral position, the
transmission is only properly lubricated
when the engine is running. Inadequate lu-
brication may cause damage.


Always use the clutch when changing
gears. The engine, transmission and drive
train are not designed to withstand the
shock of forced shifting and can be dam-
aged by shifting without the clutch.
_
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6-13
EBU14260
To start out and accelerate:
1. Release the throttle lever, and then release
the parking brake.CAUTION:_ Always close the throttle while shifting gears.
Otherwise, damage to the engine and drive
train may result. _2. Pull the clutch lever to disengage the clutch.
3. Shift into first gear.
4. Open the throttle gradually and at the same
time, release the clutch lever slowly.
5. Once the machine has attained adequate
speed, release the throttle, and at the same
time, quickly pull in the clutch lever.
U5TG61.book Page 13 Friday, April 2, 2004 11:28 AM