2005 YAMAHA YFZ450 clutch

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

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

6-11 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.
_
U5TG61.book Page 11 Friday, April 2, 2004 11:28 AM

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

6-15
6. Shift into second gear (be careful not to shift
into neutral).
7. Open the throttle part way and gradually re-
lease the clutch lever.
8. Follow the same procedure when shifting to
the next higher gear.
WARNING
_ Opening the throttle abruptly or releasing the
clutch lever too quickly would increase the
chance of an accident or could make the ma-
chine wheelie including overturn. Always open
the throttle gradually and release the clutch le-
ver gradually. _
U5TG61.book Page 15 Friday, April 2, 2004 11:28 AM

6-25
EBU14270
Parking on a slope
WARNING
_ Avoid parking on hills or other inclines. Park-
ing on a hill or other incline could cause the
ATV to roll out of control, increasing the
chance of an accident. If you must park on an
incline, put the machine in low gear, apply the
parking brake, and block the front and rear
wheels with rocks or other objects.
Do not park the ATV at all on hills that are so
steep you could not walk up them easily. _1. Bring the machine to a stop by applying the
front brake.
2. With the front and rear brake applied, pull the
clutch lever, shift into the neutral position,
and then apply the parking brake.
3. Stop the engine by setting the engine stop
switch to “OFF”.
U5TG61.book Page 25 Friday, April 2, 2004 11:28 AM

6-27
4. With the front and rear brakes applied, pull
the clutch lever, shift into 1st gear, and then
slowly release the clutch lever, brake lever
and brake pedal.NOTE:_ Make sure that the neutral indicator light goes off. _5. Turn the key to “OFF”.
U5TG61.book Page 27 Friday, April 2, 2004 11:28 AM

7-37
With the engine idling, pull the clutch lever to dis-
engage the clutch and shift into 1st gear, and then
release the parking brake. Open the throttle grad-
ually, and at the same time, release the clutch le-
ver slowly. Once the ATV has attained adequate
speed, release the throttle lever and at the same
time, quickly pull in the clutch lever and shift into
2nd gear. Open the throttle part way and gradually
release the clutch. Use this same procedure as
you move into the higher gears. Be sure to coordi-
nate the use of the throttle and shift pedal properly.
If the throttle is applied too abruptly or if the throttle
is not released during shifting, or if the shift pedal
is not released before applying the throttle, the
front wheels may lift off the ground resulting in a
loss of directional control. Avoid higher speeds un-
til you are thoroughly familiar with the operation of
your ATV.
WARNING
_ Always open the throttle gradually and release
the clutch lever slowly. Otherwise, the ATV
could wheelie which would increase the
chance of an accident. _
U5TG61.book Page 37 Friday, April 2, 2004 11:28 AM