2009 YAMAHA YFZ450R air filter

Accessories and loading ........................... 6-5
RIDING YOUR ATV ...................................... 7-1
GETTING TO KNOW YOUR ATV.............. 7-2
RIDE WITH CARE AND GOOD
JUDGEMENT ...........................................7-2
BE CAREFUL WHERE YOU RIDE ............ 7-8
TURNING YOUR ATV ............................. 7-12
CLIMBING UPHILL .................................. 7-14
RIDING DOWNHILL................................. 7-16
CROSSING A SLOPE.............................. 7-17
CROSSING THROUGH SHALLOW
WATER .................................................. 7-18
RIDING OVER ROUGH TERRAIN .......... 7-20
SLIDING AND SKIDDING ........................ 7-20
WHAT TO DO IF... ................................... 7-21
WHAT TO DO... ....................................... 7-21
PERIODIC MAINTENANCE AND MINOR
REPAIR .......................................................... 8-1
Owner’s manual and tool kit ...................... 8-1
Periodic maintenance chart for the
emission control system .......................... 8-3
General maintenance and lubrication
chart ........................................................ 8-4
Removing and installing panels ................ 8-8
Checking the spark plug .......................... 8-13
Engine oil and oil filter element ............... 8-14
Coolant .................................................... 8-19Cleaning the air filter element .................. 8-23
Cleaning the spark arrester ..................... 8-27
Adjusting the throttle cable free play ........ 8-28
Valve clearance ....................................... 8-29
Checking the front and rear brake
pads .......................................................8-29
Checking the brake fluid level .................. 8-30
Changing the brake fluid .......................... 8-32
Checking the front brake lever free
play ........................................................ 8-32
Checking the brake pedal position ........... 8-33
Adjusting the parking brake free play ...... 8-34
Brake light switches ................................. 8-35
Adjusting the clutch lever free play .......... 8-36
Drive chain slack ...................................... 8-37
Lubricating the drive chain ....................... 8-39
Checking and lubricating the cables ........ 8-40
Checking and lubricating the brake and
clutch levers ........................................... 8-40
Checking the shift pedal .......................... 8-41
Checking and lubricating the brake
pedal ......................................................8-41
Checking the wheel hub bearings ............ 8-42
Lubricating the swingarm pivots .............. 8-42
Lubricating the upper and lower arm
pivots .....................................................8-42
Battery ..................................................... 8-43
Replacing the fuse ................................... 8-46
Replacing a headlight bulb ...................... 8-46

4-17
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4. Loosen the clamp screw at the air filter case
side, and then disconnect the air intake duct
from the air filter case.5. Remove the air filter case holding plate by re-
moving the bolts and collars.
1. Coupler
1

1. Clamp screw
1

4-18
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6. Remove the blow-by gas chamber by remov-
ing the bolt.7. Remove the air filter case by removing the
bolts.
1. Bolt
2. Collar
3. Air filter case holding plate
1
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3

1. Blow-by gas chamber
2. Bolt
1
2

4-20
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(0.06 in). 10. Tighten the locknut to the specified torque.
NOTICE

ECB00080
Always tighten the locknut against the adjust-
ing nut, and then tighten it to the specified
torque.
11. Place the air filter case in the original position,
install the bolts, and then tighten them to the
specified torque.
12. Connect the air intake duct to the air filter
case, and then tighten the clamp screw at the
air filter case side.
NOTICE
ECB00970
Make sure that the air intake duct is properly
connected to the air filter case, and that the
Spring preload setting:
Minimum (soft):
Distance A = 273.5 mm (10.77 in)
Standard:
Distance A = 265.0 mm (10.43 in)
Maximum (hard):
Distance A = 253.5 mm (9.98 in)
1. Distance A
1

Tightening torque:
Locknut:
30 Nm (3.0 m·kgf, 22 ft·lbf)
Tightening torque:
Bolt:
6.5 Nm (0.7 m·kgf, 4.7 ft·lbf)

4-21
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clamp screw is tightened securely.
13. Install the blow-by gas chamber by installing
the bolt, and then tighten it to the specified
torque.
14. Install the air filter case holding plate by install-
ing the bolts and collars.
15. Connect the coupler.
16. Connect the air intake duct to the throttle
body, and then tighten the clamp screw at the
throttle body side.
NOTICE

ECB00960
Make sure that the air intake duct is properly
connected to the throttle body, and that the
clamp screw is tightened securely.
17. Install the panel.
Rebound damping force
Turn the adjusting screw in direction (a) to increase
the rebound damping force and thereby harden
the damping, and in direction (b) to decrease therebound damping force and thereby soften the
damping.
Tightening torque:
Bolt:
6.5 Nm (0.7 m·kgf, 4.7 ft·lbf)

1. Position indicator marks
2. Rebound damping force adjusting screw
Rebound damping setting:
Minimum (soft):
20 turn(s) out from the fully turned in posi-
tion
Standard:
11 turn(s) out from the fully turned in posi-
tion
Maximum (hard):
1 turn(s) out from the fully turned in position
12
(a) (b)

7-19
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in water deeper than that specified in your
Owner’s 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 lin-
ings. If the ATV is operated through deep or
fast flowing water, the tires may float, causing
loss of traction and loss of control, which
could lead to an accident.
Test your brakes after leaving the water. Do not
continue to ride your ATV without verifying that youhave regained proper braking ability.
NOTICE

ECB00240
After riding your ATV in water, be sure to drain
the trapped water by removing the check hose
at the bottom of the air filter case. Wash the
ATV in fresh water if it has been operated in
salt water or muddy conditions.

8-23
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otherwise the cooling system will not be pro-
tected against frost and corrosion.

If water has been added to the coolant, have
a Yamaha dealer check the antifreeze con-
tent of the coolant as soon as possible, oth-
erwise the effectiveness of the coolant will
be reduced.
12. Install the radiator cap, start the engine, let it
idle for several minutes, and then turn it off.
13. Remove the radiator cap to check the coolant
level in the radiator. If it is low, add sufficient
coolant until it reaches the top of the radiator,
and then install the radiator cap.
14. Start the engine, and then check for coolant
leakage.
TIP

If any leakage is found, have a Yamaha dealer
check the cooling system.
15. Install the panel.
EBU26802
Cleaning the air filter element
The air filter element should be cleaned at the in-
tervals specified in the periodic maintenance and
lubrication chart. Clean the air filter element morefrequently if you are riding in unusually wet or dusty
areas.
TIP

There is a check hose at the bottom of the air filter
case. If dust or water collects in this hose, empty
the hose and clean the air filter element and air fil-
ter case.
1. Place the ATV on a level surface.
2. Remove the seat. (See page 4-10.)
3. Remove the air filter case cover by unhooking
the holders.
1. Air filter case check hose
1

8-24
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4. Loosen the wing bolt.
5. Remove the air filter element together with the
wing bolt and washer.6. Remove the wing bolt and washer from the air
filter element.
7. Remove the sponge material from the air filter
element frame.
1. Air filter case cover
2. Air filter case cover holder
1
2

1. Wing bolt
2. Air filter element
1
2