2006 YAMAHA YFZ450 brakes

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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2-13
8Always be careful when skidding or sliding.
Learn to safely control skidding or sliding by
practicing at low speeds and on level, smooth
terrain. On extremely slippery surfaces, such
as ice, go slowly and be very cautious in
order to reduce the chance of skidding or slid-
ing out of control.
8Never operate an ATV in fast flowing water or
in water deeper than that recommended in
this manual. Remember that wet brakes may
have reduced stopping ability. Test your
brakes after leaving water. If necessary, apply
them several times to let friction dry out the
linings.
8Always use the size and type of tires specified
in this manual.
8Always maintain proper tire pressure as
described in this manual.
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4-19
1. Parking brake lever (Locked position)1. Levier de frein de stationnement (frein serré)1. Palanca del freno de estacionamiento (posición de bloqueo)
1. Parking brake lever (Unlocked position)
1. Levier de frein de stationnement (frein relâché)1. Palanca del freno de estacionamiento
(posición de desbloqueo)
EBU14072
Parking brake lever
Use the parking brake when you have to start
the engine or park the machine, especially on a
slope. To apply the parking brake, move the
parking brake lever in direction
a. To release
the parking brake, move the parking brake lever
in direction b.
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8Always set the parking brake before start-
ing the engine. The ATV could start mov-
ing unexpectedly if the parking brake is
not applied. This could cause loss of con-
trol or a collision.
8Always be sure you have released the
parking brake before you begin to ride.
The brake could overheat if you ride the
ATV without releasing the parking brake.
You could lose braking performance
which could cause an accident. You could
also wear out the brakes prematurely.
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5-7
EBU11670
Front and rear brakes
Brake lever and brake pedal
8Check that there is no free play in the brake
lever. If there is free play, have a Yamaha
dealer inspect the brake system.
8Check for correct brake pedal height. (See
page 8-93.) If the pedal height is incorrect,
have a Yamaha dealer adjust it.
8Check the operation of the brake lever and
brake pedal. They should move smoothly and
there should be a firm feeling when the
brakes are applied. If not, have a Yamaha
dealer inspect the brake system.
Brake fluid level
Check the brake fluid level. Add fluid if neces-
sary. (See pages 8-85–8-89.)
Recommended brake fluid: DOT 4
5TG-9-62 5-6 5/13/05 1:45 PM Page 5-7

5-9
Brake fluid leakage
Check to see if any brake fluid is leaking out of
the pipe joints or brake fluid reservoirs. Apply
the brakes firmly for one minute. If there is any
leakage, have a Yamaha dealer inspect the
brake system.
Brake operation
Test the brakes at slow speed after starting out
to make sure they are working properly. If the
brakes do not provide proper braking perfor-
mance, inspect the brake pads for wear. (See
page 8-81–8-83.)
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5-11
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Always check the brakes at the start of every
ride. Do not ride the ATV if you find any
problem with the brakes or you could lose
braking ability, which could lead to an acci-
dent. If a problem cannot be corrected by the
adjustment procedures provided in this man-
ual, have a Yamaha dealer check for the
cause.
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6-17
EBU02080
To decelerate:
When slowing down or stopping, release the
throttle and apply the brakes smoothly and
evenly. As you slow down, shift to a lower gear.
Be sure that the engine has sufficiently slowed
before engaging a lower gear. Improper use of
the brakes or shifting can cause the tires to lose
traction, reducing control and increasing the
possibility of an accident.
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Make sure the engine has sufficiently slowed
before shifting to a lower gear. Engaging a
lower gear when the engine speed is too
high could make the wheels stop rotating.
This could cause loss of control, an accident
and injury. It could also cause engine or
drive train damage.
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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”.
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