2005 YAMAHA YFZ450 wheel

Brake pedal, brake lever and
clutch lever lubrication.................... 8-113
Front upper and lower arm pivot
lubrication ....................................... 8-117
Rear arm pivot lubrication ................ 8-119
Wheel removal ................................. 8-121
Wheel installation ............................. 8-123
Battery .............................................. 8-125
Battery maintenance ........................ 8-129
Fuse replacement............................. 8-131
Replacing a headlight bulb ............... 8-133
Headlight beam adjustment.............. 8-139
Tail/brake light bulb replacement ..... 8-141
Troubleshooting................................ 8-143
Troubleshooting chart....................... 8-147
CLEANING AND STORAGE ................... 9-1
A. Cleaning ........................................... 9-1
B. Storage ............................................ 9-7
SPECIFICATIONS ................................ 10-1
CONVERSION TABLE .......................... 11-1
91011U5TG61.book Page 3 Friday, April 2, 2004 11:28 AM

2-5

Never operate at speeds too fast for your skills
or the conditions. Always go at a speed that is
proper for the terrain, visibility, operating condi-
tions, and your experience.


Never attempt wheelies, jumps, or other stunts.


Always inspect your ATV each time you use it
to make sure it is in safe operating condition.
Always follow the inspection and maintenance
procedures and schedules described in this
manual.


Always keep both hands on the handlebars
and both feet on the footrests of the ATV during
operation.


Always go slowly and be extra careful when op-
erating on unfamiliar terrain. Always be alert to
changing terrain conditions when operating the
ATV.
U5TG61.book Page 5 Friday, April 2, 2004 11:28 AM

5-1
EBU01130
1-PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Front brakeCheck operation, lever free play, fluid level and fluid leakage.
Fill with DOT 4 brake fluid if necessary.5-5–5-7, 8-79,
8-83–8-89
Rear brakeCheck operation, fluid level and fluid leakage.
Fill with DOT 4 brake fluid if necessary.5-5–5-7,
8-81–8-87, 8-91
ClutchCheck operation, condition and lever free play. 8-99
Parking brakeCheck operation, condition and cable length. 8-93–8-95
FuelCheck fuel level.
Fill with fuel if necessary.5-9–5-11
Engine oilCheck oil level.
Fill with oil if necessary.5-13, 8-23–8-39
Coolant reservoirCheck coolant level in reservoir.
Fill with coolant if necessary.5-15–5-17,
8-41–8-51
Drive chainCheck chain slack and condition.
Adjust if necessary.5-17, 8-101–8-109
ThrottleCheck for proper throttle cable operation and free play. 5-17, 8-77
Wheels and tiresCheck tire pressure, wear and damage.5-21–5-27,
8-121–8-123
Fittings and fastenersCheck all fittings and fasteners. 5-19
Lights and switchesCheck for proper operation.5-19, 8-97,
8-133–8-141
U5TG61.book Page 1 Friday, April 2, 2004 11:28 AM

6-15
6. Shift into second gear (be careful not to shift
into neutral).
7. Open the throttle part way and gradually re-
lease the clutch lever.
8. Follow the same procedure when shifting to
the next higher gear.
WARNING
_ Opening the throttle abruptly or releasing the
clutch lever too quickly would increase the
chance of an accident or could make the ma-
chine wheelie including overturn. Always open
the throttle gradually and release the clutch le-
ver gradually. _
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6-17
EBU02080
To decelerate:
When slowing down or stopping, release the throt-
tle 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 shift-
ing can cause the tires to lose traction, reducing
control and increasing the possibility of an acci-
dent.
WARNING
_ Make sure the engine has sufficiently slowed
before shifting to a lower gear. Engaging a low-
er 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. _
U5TG61.book Page 17 Friday, April 2, 2004 11:28 AM

6-25
EBU14270
Parking on a slope
WARNING
_ Avoid parking on hills or other inclines. Park-
ing on a hill or other incline could cause the
ATV to roll out of control, increasing the
chance of an accident. If you must park on an
incline, put the machine in low gear, apply the
parking brake, and block the front and rear
wheels with rocks or other objects.
Do not park the ATV at all on hills that are so
steep you could not walk up them easily. _1. Bring the machine to a stop by applying the
front brake.
2. With the front and rear brake applied, pull the
clutch lever, shift into the neutral position,
and then apply the parking brake.
3. Stop the engine by setting the engine stop
switch to “OFF”.
U5TG61.book Page 25 Friday, April 2, 2004 11:28 AM

7-21
During operation
Always keep your feet on the footboards during
operation. Otherwise your feet may contact the
rear wheels.
WARNING
_ Always keep both hands on the handlebars
and both feet on the footboards of your ATV
during operation. Removing even one hand or
foot can reduce your ability to control the ATV
or could cause you to lose your balance and
fall off of the ATV. If you remove a foot from a
footboard, your foot or leg may come into con-
tact with the rear wheels, which could injure
you or cause an accident. _Avoid wheelies and jumping. You may lose control
of the ATV or overturn.
WARNING
_ Never attempt stunts, such as wheelies or
jumps. Don’t try to show off. _
U5TG61.book Page 21 Friday, April 2, 2004 11:28 AM

7-37
With the engine idling, pull the clutch lever to dis-
engage the clutch and shift into 1st gear, and then
release the parking brake. Open the throttle grad-
ually, and at the same time, release the clutch le-
ver slowly. Once the ATV has attained adequate
speed, release the throttle lever and at the same
time, quickly pull in the clutch lever and shift into
2nd gear. Open the throttle part way and gradually
release the clutch. Use this same procedure as
you move into the higher gears. Be sure to coordi-
nate the use of the throttle and shift pedal properly.
If the throttle is applied too abruptly or if the throttle
is not released during shifting, or if the shift pedal
is not released before applying the throttle, the
front wheels may lift off the ground resulting in a
loss of directional control. Avoid higher speeds un-
til you are thoroughly familiar with the operation of
your ATV.
WARNING
_ Always open the throttle gradually and release
the clutch lever slowly. Otherwise, the ATV
could wheelie which would increase the
chance of an accident. _
U5TG61.book Page 37 Friday, April 2, 2004 11:28 AM