2006 YAMAHA YFZ450 light

LOCATION OF THE WARNING AND
SPECIFICATION LABELS ..................1-1
SAFETY INFORMATION ..................... 2-1
DESCRIPTION AND MACHINE
IDENTIFICATION ............................... 3-1
Identification number records ............. 3-3
Key identification number ................... 3-5
Vehicle identification number ............. 3-5
Model label ......................................... 3-7
CONTROL FUNCTIONS ...................... 4-1
Main switch ......................................... 4-1
Indicator and warning lights ................ 4-3
Handlebar switches ............................ 4-7
Throttle lever .................................... 4-11
Speed limiter .................................... 4-13
Clutch lever ...................................... 4-15
Brake lever ....................................... 4-17Brake pedal ...................................... 4-17
Parking brake lever .......................... 4-19
Shift pedal ........................................ 4-21
Fuel tank cap .................................... 4-21
Fuel cock .......................................... 4-23
Starter (choke) ................................... 4-25
Seat .................................................. 4-27
Front shock absorber adjustment ..... 4-29
Rear shock absorber adjustment ..... 4-39
PRE-OPERATION CHECKS ................ 5-1
Front and rear brakes ......................... 5-7
Fuel .................................................. 5-13
Engine oil .......................................... 5-17
Coolant ............................................. 5-19
Chain ................................................ 5-21
Throttle lever .................................... 5-21
Tires ................................................. 5-23
How to measure tire pressure .......... 5-27
Tire wear limit ................................... 5-29
Fittings and fasteners ....................... 5-29
EBU00150
CONTENTS
1
2
3
4
5
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Lights ................................................ 5-29
Switches ........................................... 5-29
OPERATION ........................................ 6-1
Starting a cold engine ......................... 6-3
Starting a warm engine ...................... 6-9
Warming up ........................................ 6-9
Shifting ............................................. 6-11
To start out and accelerate ............... 6-13
To decelerate ................................... 6-17
Engine break-in ................................ 6-19
Parking ............................................. 6-23
Parking on a slope ............................ 6-25
Accessories and loading .................. 6-29
RIDING YOUR ATV .............................. 7-1
GETTING TO KNOW YOUR ATV ...... 7-3
RIDE WITH CARE AND GOOD
JUDGEMENT ................................... 7-5
BE CAREFUL WHERE YOU RIDE ... 7-27
TURNING YOUR ATV ...................... 7-41CLIMBING UPHILL .......................... 7-47
RIDING DOWNHILL ......................... 7-57
CROSSING A SLOPE .......................7-61
CROSSING THROUGH SHALLOW
WATER .......................................... 7-65
RIDING OVER ROUGH TERRAIN ....7-69
SLIDING AND SKIDDING .................7-71
WHAT TO DO IF ... ...........................7-75
WHAT TO DO ... .............................. 7-75
PERIODIC MAINTENANCE AND
ADJUSTMENT ................................... 8-1
Owner’s manual and tool kit ............... 8-3
PERIODIC MAINTENANCE/
LUBRICATION .................................. 8-7
Panel removal and installation ......... 8-19
Engine oil and oil filter element ........ 8-25
Cooling system ................................. 8-43
Changing the coolant ....................... 8-47
Spark plug inspection ....................... 8-55
Air filter element cleaning ................. 8-67
6
7
8
5TG-9-62 1-3 5/13/05 10:06 AM Page 13

Carburetor adjustment ...................... 8-75
Idle speed adjustment ...................... 8-77
Valve clearance adjustment ............. 8-77
Throttle lever adjustment .................. 8-79
Front brake pad inspection ............... 8-81
Rear brake pad inspection ............... 8-83
Brake fluid level inspection ............... 8-85
Brake fluid replacement .................... 8-91
Front brake lever free play ............... 8-93
Brake pedal height adjustment ......... 8-95
Parking brake adjustment ................. 8-97
Adjusting the rear brake light switch.... 8-101
Clutch lever free play adjustment .... 8-103
Drive chain slack check .................. 8-105
Adjusting the drive chain slack ....... 8-107
Lubricating the drive chain ............. 8-111
Cable inspection and lubrication .... 8-115
Brake pedal, brake lever and
clutch lever lubrication .................. 8-117
Front upper and lower arm pivot
lubrication ..................................... 8-121Rear arm pivot lubrication .............. 8-123
Wheel removal ............................... 8-125
Wheel installation ........................... 8-127
Battery ............................................ 8-129
Battery maintenance ...................... 8-133
Fuse replacement ........................... 8-135
Replacing a headlight bulb ............. 8-137
Headlight beam adjustment ............ 8-143
Tail/brake light ................................ 8-143
Troubleshooting .............................. 8-145
Troubleshooting chart ..................... 8-149
CLEANING AND STORAGE ................ 9-1
A. CLEANING ..................................... 9-1
B. STORAGE ..................................... 9-7
SPECIFICATIONS .............................. 10-1
Conversion table ................................. 11-1
9
10
11
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2-17
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8Always turn off the engine when refueling.
8Do not refuel immediately after the engine
has been running and is still very hot.
8Do not spill gasoline on the engine or
exhaust pipe/muffler when refueling.
Never refuel while smoking or in the vicini-
ty of sparks, open flames, or other
sources of ignition such as the pilot lights
of water heaters and clothes dryers.
Gasoline can catch fire. You could be
burned.
8When transporting the machine in another
vehicle, be sure it is kept upright and that
the fuel cock is in the “OFF” position.
Otherwise, fuel may leak out of the carbu-
retor or fuel tank.
8Gasoline is poisonous. If you should swal-
low some gasoline or inhale a lot of gaso-
line vapor, or get some gasoline in your
eyes, see your doctor immediately. If
gasoline spills on your skin, wash with
soap and water. If gasoline spills on your
clothing, change your clothes.
5TG-9-62 1-3 5/13/05 10:06 AM Page 2-17

3-1
EBU00320
DESCRIPTION AND MACHINE
IDENTIFICATION
1. Seat 11. Tail/brake light
2. Fuel tank cap 12. Coolant reservoir
3. Radiator cap 13. Shift pedal
4. Oil filter element 14. Engine oil tank
5. Brake pedal 15. Clutch lever
6. Headlights 16 Handlebar switches
7. Fuel cock 17. Parking brake lever
8. Starter (choke) 18. Main switch
9. Throttle stop screw 19. Throttle lever
10. Fuse 20. Brake lever
NOTE:
The machine you have purchased may differ
slightly from those shown in the figures of this
manual.
5TG-9-62 1-3 5/13/05 10:06 AM Page 3-1

4-3
1. Neutral indicator light “N”
2. Coolant temperature warning light “ ”
1. Témoin de point mort “N”
2. Témoin d’avvertissement de la température du liquide de
refroidissement “ ”
1. Luz de control de punto muerto “N”
2. Luz de aviso de la temperatura del refrigerante “ ”
EBU08020
Indicator and warning lights
EBU06030
Neutral indicator light “N”
This indicator light comes on when the transmis-
sion is in neutral.
EBU13850
Coolant temperature warning light “ ”
When the coolant temperature reaches a speci-
fied level, this light comes on to warn that the
coolant temperature is too hot. If the light comes
on during operation, stop the engine as soon as
it is safe to do so and allow the engine to cool
down for about 10 minutes.
The electrical circuit of the warning light can be
checked according to the following procedures.
1. Set the engine stop switch to “RUN” and
turn the key to “ON”.
2. Shift the transmission into the neutral posi-
tion or pull the clutch lever.
5TG-9-62 4 5/12/05 5:18 PM Page 4-3

4-5
3. Push the start switch. If the warning light
does not come on while the start switch is
pushed, have a Yamaha dealer check the
electrical circuit.
cC
8The engine may overheat if the ATV is
overloaded. If this happens, reduce the
load to specification.
8Restart after making sure that the light is
off. Continuous use while the light is on
may cause damage to the engine.
5TG-9-62 4 5/12/05 5:18 PM Page 4-5

4-7
1. Light switch “LIGHTS”
2. Engine stop switch “ENG. STOP”
3. Start switch “START”
1. Contacteur d’éclairage “LIGHTS”
2. Coupe-circuit du moteur “ENG. STOP”
3. Contacteur du démarreur “START”
1. Interruptor de luces “LIGHTS”
2. Interruptor de paro del motor “ENG. STOP”
3. Interruptor de arranque “START”
EBU00530
Handlebar switches
EBU13741
Light switch “LIGHTS”
Set the switch to the “LO” position to turn on the
low beam and the taillight.
Set the switch to the “HI” position to turn on the
high beam and the taillight.
Set the switch to the “OFF” position to turn off all
the lights.
NOTE:
The headlights and the taillight can be turned on
only when the engine is started.
EBU06470
Start switch “START”
The starter motor cranks the engine when this
switch is pushed.
cC
See the starting instructions on page 6-3
prior to starting the engine.
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