2005 YAMAHA YFZ450 warning

8-5
WARNING
_ Never modify this ATV through improper in-
stallation or use of accessories. Improper in-
stallation of accessories or modification of this
vehicle may cause changes in handling which
in some situations could lead to an accident.
All parts and accessories added to this vehicle
should be genuine Yamaha or equivalent com-
ponents designed for use on this ATV and
should be installed and used according to in-
structions. If you have questions, consult an
authorized Yamaha ATV dealer. _
U5TG61.book Page 5 Friday, April 2, 2004 11:28 AM

8-45 1. Coolant drain bolt 2. Trough
1. Boulon de vidange du liquide de refroidissement
2. Feuille de papier pliée comme illustré
1. Perno de drenaje de refrigerante
2. Elemento de paso
1. Radiator cap
1. Bouchon de radiateur
1. Tapa del radiador
EBU14130
Changing the coolant
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. _1. Place the ATV on a level surface.
2. Remove panel A. (See page 8-17 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.
U5TG61.book Page 45 Friday, April 2, 2004 11:28 AM

8-53 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
EBU14142
Spark plug inspection
Removal
1. Remove the seat. (See page 4-27 for seat re-
moval and installation procedures.)
2. Remove the bolts and the quick fastener
screws.
3. Remove the fuel tank cap by turning it coun-
terclockwise.
WARNING
_

Always turn off the engine when removing
the fuel tank cap.


Do not remove the fuel tank cap immedi-
ately after the engine has been running
and is still very hot.


Do not spill gasoline on the engine, ex-
haust pipe or muffler.


Never 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.
_
U5TG61.book Page 53 Friday, April 2, 2004 11:28 AM

8-55 1. Bolt
1. Boulon
1. Perno
1. Spark plug cap
1. Capuchon de bougie
1. Tapa de bujía
4. Pull the panel backward, and then remove it.
5. Install the fuel tank cap by turning it clock-
wise.
6. Remove the bolt, lift the rear of the fuel tank,
and then tilt it back.
WARNING
_ Before lifting the fuel tank, make sure that the
fuel cock is in the “OFF” position and the fuel
tank cap is securely tightened. Otherwise, fuel
may leak out of the carburetor or fuel tank. _7. Remove the spark plug cap.
U5TG61.book Page 55 Friday, April 2, 2004 11:28 AM

8-67 1. Wing bolt 2. Air filter element
1. Boulon papillon 2.Élément du filtre à air
1. Perno de aletas 2. Elemento del filtro de aire
1. Air filter element 2. Frame
1.Élément du filtre à air 2. Armature
1. Elemento del filtro de aire 2. Bastidor
3. Remove the air filter element by removing the
wing bolt.
4. Remove the air filter element from its frame.
5. Wash the air filter element gently but thor-
oughly in solvent.
WARNING
_ Always use parts cleaning solvent to clean the
air filter element. Never use low flash point sol-
vents or gasoline to clean the air filter element
because the engine could catch fire or ex-
plode. _
U5TG61.book Page 67 Friday, April 2, 2004 11:28 AM

8-89 a. Brake lever free play
a. Jeu du levier de frein
a. Juego de la palanca de freno
EBU11880
Front brake lever free play
The front brake lever should have a free play of
zero mm at the lever end. If not, have a Yamaha
dealer check the brake system.
WARNING
_ Operating with improperly serviced or adjust-
ed brakes could cause loss of braking ability
which could lead to an accident.
After servicing:

Make sure the brakes operate smoothly
and that the free play is correct.


Make sure the brakes do not drag.


Make sure the brakes are not spongy. All
air must be bled from the brake system.
Replacement of brake components requires
professional knowledge. These procedures
should be performed by a Yamaha dealer.
_
U5TG61.book Page 89 Friday, April 2, 2004 11:28 AM

8-91 a. Brake pedal position
a. Position de la pédale de frein
a. Posición del pedal del freno
EBU10790
Brake pedal height adjustment
The top of the brake pedal should be positioned
11.7 mm below the top of the footrest. If not, have
a Yamaha dealer adjust it.
WARNING
_ Operating with improperly serviced or adjust-
ed brakes could cause loss of braking ability,
which could lead to an accident. After servic-
ing:

Make sure the brakes operate smoothly
and that the brake pedal position is cor-
rect.


Make sure the brakes do not drag.


Make sure the brakes are not spongy. All
air must be bled from the brake system.
Replacement of brake components requires
professional knowledge. These procedures
should be performed by a Yamaha dealer.
_
U5TG61.book Page 91 Friday, April 2, 2004 11:28 AM

8-95
5. Screw in the adjusting bolt at the rear brake
caliper by hand until it feels tight, then screw it
out 1/8 turn. Tighten the locknut to the speci-
fied torque.CAUTION:_ When tightening the locknut, hold the adjust-
ing bolt with a wrench so that the adjusting
bolt does not turn together with the locknut. _
WARNING
_ Operating with improperly adjusted brakes
could cause the brakes to malfunction, result-
ing in reduced braking performance. This
could increase the chance of a collision or ac-
cident. After adjusting the parking brake, block
the rear of the machine off the ground and spin
the rear wheels. Check to make sure there is
no brake drag. If brake drag is noticed, perform
the adjustment again. _
Tightening torque:
Locknut:
16 Nm (1.6 m·kgf)
U5TG61.book Page 95 Friday, April 2, 2004 11:28 AM