2006 YAMAHA YFZ450 check engine 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
5TG-9-62 1-3 5/13/05 10:06 AM Page 12

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

5-1
EBU01130
PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Front brake9Check operation lever, free play, fluid level and fluid leakage. 5-7–5-11, 8-81,
9Fill with DOT 4 brake fluid if necessary. 8-85–8-91
Rear brake9Check operation, fluid level and fluid leakage. 5-7–5-11
9Fill with DOT 4 brake fluid if necessary. 8-83–8-89, 8-93
Clutch9Check operation, condition and lever free play. 8-103
Parking brake9Check operation, condition and cable length. 8-97–8-99
Fuel 9Check fuel level.
9Fill with fuel if necessary.5-13–5-15
Engine oil9Check oil level.
9Fill with oil if necessary.5-17, 8-25–8-41
Coolant reservoir 9Check coolant level in reservoir.
9Fill with coolant if necessary.5-19–5-21, 8-43–8-53
Drive chain9Check chain slack and condition.
9Adjust if necessary.5-21, 8-105–8-113
Throttle9Check for proper throttle cable operation and free play. 5-21, 8-79
Wheels and tires9Check tire pressure, wear and damage. 5-23–5-29, 8-125–8-127
Fittings and fasteners9Check all fittings and fasteners. 5-29
Lights and switches9Check for proper operation. 5-29, 8-99, 8-137–8-141
5TG-9-62 5-6 5/13/05 1:45 PM Page 5-1

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 engine is warm, check if it responds to the
throttle normally with the starter (choke) turned
off.
5TG-9-62 5-6 5/13/05 1:45 PM Page 6-9

8-9
INITIAL EVERY
month 1 3 6 6 12
ITEM ROUTINEWhichever
km 320 1200 2400 2400 4800 comes first
(mi) (200) (750) (1500) (1500) (3000)
hours 20 75 150 150 300
9Check operation.
Steering system*9Repair if damaged.
22222
9Check toe-in.
9Adjust if necessary.
Engine oil9Replace (Warm engine before draining).2 222
Engine oil filter
9Replace.222
element
9Check coolant leakage.
Cooling system9Repair if necessary.22222
9Replace coolant every 24 months.
9Check operation.
Lights and switches*
9
Adjust headlight beams.22222
5TG-9-62 8 5/13/05 1:48 PM Page 8-9