2011 YAMAHA YFZ450R fuel

EBU17420
TABLE OF CONTENTS
LOCATION OF THE WARNING AND
SPECIFICATION LABELS ............................ 1-1
SAFETY INFORMATION .............................. 2-1
DESCRIPTION .............................................. 3-1
Left view ...................................................... 3-1
Right view.................................................... 3-1
Controls and instruments ............................ 3-2
INSTRUMENT AND CONTROL
FUNCTIONS .................................................. 4-1
Main switch ................................................ 4-1
Indicator light and warning lights ................ 4-2
Handlebar switches .................................... 4-3
Throttle lever .............................................. 4-4
Speed limiter .............................................. 4-5
Clutch lever ................................................ 4-5
Brake lever ................................................. 4-6
Brake pedal ................................................ 4-6
Parking brake lever .................................... 4-7
Shift pedal .................................................. 4-8
Fuel tank cap .............................................. 4-8
Fuel ............................................................ 4-9Seat ..........................................................4-10
Adjusting the front shock absorber
assemblies ..............................................4-11
Adjusting the rear shock absorber
assembly .................................................4-16
Handlebar position ....................................4-24
PRE-OPERATION CHECKS ..........................5-1
Fuel .............................................................5-4
Engine oil ....................................................5-4
Coolant .......................................................5-4
Front and rear brakes .................................5-4
Throttle lever ...............................................5-5
Drive chain ..................................................5-5
Tires ............................................................5-5
Chassis fasteners .......................................5-7
Instruments, lights and switches .................5-7
OPERATION...................................................6-1
Starting the engine ......................................6-1
Shifting ........................................................6-2
Engine break-in ...........................................6-4
Parking ........................................................6-4
Parking on a slope ......................................6-5U18P64E0.book Page 1 Thursday, May 13, 2010 6:00 PM

1-5
1
**.* kPa
*.** kgf/cm²
*.* psi**.* kPa
*.** kgf/cm²
*.* psi
NEVER use with drugs or alcohol.
NEVER store fuel or flammable liquids.
This unit contains high-pressure nitrogen
gas.
Mishandling can cause an explosion. Do not
incinerate, puncture or open.
Use unleaded gasoline only.
Measure the tire pressure when the tires are
cold.Adjust the tire pressure.
Improper tire pressure can cause loss of
control.
Loss of control can result in severe injury or
death.
Turning the ATV in 4WD-LOCK
(“DIFF.LOCK”) takes more effort.
Operate at a slow speed and allow extra
time and distance for maneuvers to avoid
loss of control.
This pictogram shows the loading limits
and/or maximum load capacity for this ATV.
Follow all load limits and other loading
guidelines in this manual.
Load may include the driver, passenger,
human protective gear, accessories, goods,
luggage, and all other load related items.
Make sure you do not exceed the load limits.
Overloading can cause loss of control.
Loss of control can result in severe injury or
death.
U18P64E0.book Page 5 Thursday, May 13, 2010 6:00 PM

3-2
3
EBU17712Controls and instrumentsTIPThe ATV you have purchased may differ slightly
from the figures shown in this manual.1. Clutch lever
2. Parking brake lever
3. Handlebar switches
4. Fuel tank cap
5. Main switch
6. Front brake fluid reservoir
7. Throttle lever
8. Brake lever
2
1
3
7
6
5
8
4
U18P64E0.book Page 2 Thursday, May 13, 2010 6:00 PM

4-2
4
EBU29382Indicator light and warning lights EBU17860Neutral indicator light“”
This indicator light comes on when the transmis-
sion is in the neutral position.
EBU29920Coolant temperature warning light“”
This warning light comes on when the engine over-
heats. When this occurs during operation, stop the
engine as soon as it is safe to do so and allow it to
cool down for about 10 minutes.
The electrical circuit of the warning light can be
checked by turning the key to“”. The warning
light should come on for a few seconds, and then
go off.
If the warning light does not come on initially when
the key is turned to“”, or if the warning light re-
mains on, have a Yamaha dealer check the electri-
cal circuit.NOTICEECB00010
The engine may overheat if the ATV is over-
loaded. In this case, reduce the load to spec-
ification.
Start the engine after making sure that the
warning light is out. Continuous use while
the warning light is on may cause damage to
the engine.
1. Fuel level warning light“”
2. Engine trouble warning light“”
3. Coolant temperature warning light“”
4. Neutral indicator light “N”
12 3 4
U18P64E0.book Page 2 Thursday, May 13, 2010 6:00 PM

4-3
4
EBU29930Fuel level warning light“”
This warning light comes on when the fuel level
drops below approximately 3.4 L (0.90 US gal,
0.75 Imp.gal). When this occurs, refuel as soon as
possible.
The electrical circuit of the warning light can be
checked by setting the engine stop switch to“”
and turning the key to“”. The warning light
should come on for a few seconds, and then go off.
If the warning light does not come on initially when
the key is turned to“”, or if the warning light re-
mains on, have a Yamaha dealer check the electri-
cal circuit.EBU29941Engine trouble warning light“”
This warning light comes on or flashes when an
electrical circuit monitoring the engine is not work-
ing correctly. When this occurs, have a Yamaha
dealer check the self-diagnosis system.
The electrical circuit of the warning light can be
checked by turning the key to“”. The warning
light should come on for a few seconds, and then
go off.If the warning light does not come on initially when
the key is turned to“”, or if the warning light re-
mains on, have a Yamaha dealer check the electri-
cal circuit.
EBU18061Handlebar switches EBU18080Engine stop switch“/”
Set this switch to“” before starting the engine.
The engine stop switch controls the ignition and
stops the engine when it is running. Use this switch1. Light switch“/ /OFF”
2. Engine stop switch“/”
3. Start switch“”
1
2
3
U18P64E0.book Page 3 Thursday, May 13, 2010 6:00 PM

4-8
4
WARNING
EWB00220
Always set the parking brake before starting
the engine. The ATV could start moving un-
expectedly if the parking brake is not ap-
plied. This could cause loss of control or a
collision.
Always be sure you have released the park-
ing brake before you begin to ride. The brake
could overheat if you ride the ATV without re-
leasing the parking brake. You could lose
braking performance which could cause an
accident. You could also wear out the brakes
prematurely.EBU18530Shift pedal This ATV is equipped with a constant-mesh 5-
speed transmission. The shift pedal is located on
the left side of the engine and is used in combina-
tion with the clutch when shifting.
EBU18720Fuel tank cap Remove the fuel tank cap by turning it counter-
clockwise.1. Shift pedal
1
U18P64E0.book Page 8 Thursday, May 13, 2010 6:00 PM

4-9
4
EBU18814Fuel Make sure there is sufficient gasoline in the tank.
WARNING
EWB02521Gasoline and gasoline vapors are extremely
flammable. To avoid fires and explosions and
to reduce the risk of injury when refueling, fol-
low these instructions.1. Before refueling, turn off the engine and be
sure that no one is sitting on the vehicle. Nev-
er refuel while smoking, or while in the vicinityof sparks, open flames, or other sources of ig-
nition such as the pilot lights of water heaters
and clothes dryers.
2. Do not overfill the fuel tank. When refueling,
be sure to insert the pump nozzle into the fuel
tank filler hole. Stop filling when the fuel reach-
es the bottom of the filler tube. Because fuel
expands when it heats up, heat from the en-
gine or the sun can cause fuel to spill out of
the fuel tank.1. Fuel tank cap
1
1. Maximum fuel level
2. Fuel tank filler tube
2 1
U18P64E0.book Page 9 Thursday, May 13, 2010 6:00 PM

4-10
4
3. Wipe up any spilled fuel immediately.
NOTICE: Immediately wipe off spilled fuel
with a clean, dry, soft cloth, since fuel may
deteriorate painted surfaces or plastic
parts.
[ECB00981]
4. Turn the fuel tank cap fully clockwise to make
sure it is securely closed.
WARNING
EWB02531Gasoline is poisonous and can cause injury or
death. Handle gasoline with care. Never siphon
gasoline by mouth. If you should swallow
some gasoline or inhale a lot of gasoline vapor,
or get some gasoline in your eyes, see yourdoctor immediately. If gasoline spills on your
skin, wash with soap and water. If gasoline
spills on your clothing, change your clothes.
NOTICEECB00070Use only unleaded gasoline. The use of leaded
gasoline will cause severe damage to internal
engine parts, such as the valves and piston
rings, as well as to the exhaust system.Your Yamaha engine has been designed to use
premium unleaded gasoline with a research oc-
tane number of 97 or higher. If knocking (or ping-
ing) occurs, use a gasoline of a different brand.
Use of unleaded fuel will extend spark plug life and
reduce maintenance costs.EBU18891Seat To remove the seat
Insert your hand between the rear of the seat and
the rear fender, pull the seat lock lever upward and
pull up the seat at the rear. Recommended fuel:
PREMIUM UNLEADED GASOLINE ONLY
For Europe: PREMIUM UNLEADED GASO-
LINE ONLY with a research octane number
of 97 or higher
Fuel tank capacity:
10.0 L (2.64 US gal, 2.20 Imp.gal)
Fuel reserve amount:
3.4 L (0.90 US gal, 0.75 Imp.gal)
U18P64E0.book Page 10 Thursday, May 13, 2010 6:00 PM