2011 YAMAHA YFZ450R Owners Manual

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8
NOTICEECB00931To charge a VRLA (Valve Regulated Lead Acid)
battery, a special (constant-voltage) battery
charger is required. Using a conventional bat-
tery charger will damage the battery.To store the battery
If the ATV will not be used for more than one
month, remove the battery, fully charge it, and
then place it in a cool, dry place.
If the battery will be stored for more than two
months, check it at least once a month and fully
charge it if necessary.NOTICEECB00940Always keep the battery charged. Storing a dis-
charged battery can cause permanent battery
damage.To install the batteryTIPBe sure the battery is fully charged.1. Place the battery in its compartment.2. Connect the positive battery lead first, then
connect the negative battery lead by installing
their bolt.NOTICE: When installing the bat-
tery, the main switch must be off, and the
positive lead must be connected before
the negative lead.
[ECB01110]
3. Install the battery holding plate by installing
the bolts.
4. Install the seat. (See page 4-10.)1. Positive battery lead (red)
2. Negative battery lead (black)
2
1
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8
EBU29960Replacing the fuse The fuse holder is located under the seat. (See
page 4-10.)
If the fuse is blown, replace it as follows.
1. Turn the key to“” and turn off all electrical
circuits.NOTICEECB00640To prevent accidental short-circuiting, turn off
the main switch when checking or replacing a
fuse.
2. Remove the blown fuse, and then install a
new fuse of the specified amperage.
WARNING! Always use a fuse of the spec-
ified rating, and never use a substitute ob-
ject in place of the proper fuse. An
improper fuse or a substitute object can
cause damage to the electrical system,
which could lead to a fire.
[EWB02172]
3. Turn the key to“” and turn on the electrical
circuits to check if the devices operate.
4. If the fuse immediately blows again, have a
Yamaha dealer check the electrical system.EBU30160Replacing a headlight bulb If a headlight bulb burns out, replace it as follows.
1. Remove the headlight unit by removing the
bolt, and then pulling the headlight unit as
shown.
1. Fuse
2. Spare fuse
1
2
Specified fuse:
20.0 A
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8 2. Remove the headlight bulb holder cover.3. Remove the headlight bulb holder by pushing
it in and turning it counterclockwise, and then
remove the burnt-out bulb.
4. Place a new headlight bulb into position.
NOTICE: Do not touch the glass part of the
headlight bulb to keep it free from oil, oth-
erwise the transparency of the glass, the
luminosity of the bulb, and the bulb life will
be adversely affected. Thoroughly clean
off any dirt and fingerprints on the head-
light bulb using a cloth moistened with al-
cohol or thinner.
[ECB00651]
1. Headlight unit
2. Bolt
1. Headlight bulb holder cover
1
2
1
1. Headlight bulb holder
1
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85. Install the headlight bulb holder by pushing it
in and turning it clockwise.
6. Install the headlight bulb holder cover.
7. Place the headlight unit in the original posi-
tion, and then install the bolt.8. Adjust the headlight beam if necessary.
EBU25561Adjusting a headlight beam NOTICEECB00690It is advisable to have a Yamaha dealer make
this adjustment.To raise a headlight beam, turn the headlight beam
adjusting bolt in direction (a).
To lower a headlight beam, turn the adjusting bolt
in direction (b).
1. Do not touch the glass part of the bulb.U18P64E0.book Page 46 Thursday, May 13, 2010 6:00 PM

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EBU26920Tail/brake light This model is equipped with an LED type of
tail/brake light.
If the tail/brake light does not come on, have a
Yamaha dealer check it.EBU25651Removing a wheel 1. Place the ATV on a level surface.
2. Loosen the wheel nuts.Front
Rear1. Headlight beam adjusting bolt
1
(a)
(b)
1. Wheel nut
1. Wheel nut
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83. Elevate the ATV and place a suitable stand
under the frame.
4. Remove the nuts from the wheel.
5. Remove the wheel.
EBU25681Installing a wheel 1. Place the ATV on a level surface.
2. Install the wheel and the nuts.TIP
When installing a front wheel, make sure its ar-
row mark points toward the rotating direction
of the wheel.
When installing a rear wheel, make sure its
wording “SIDE FACING OUTWARDS” faces
outwards.
Front
Rear1. Arrow mark
1.“SIDE FACING OUTWARDS”
SIDEFACINGOUTWARDS
1
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8 3. Lower the ATV to the ground.
4. Tighten the wheel nuts to the specified
torques.
EBU25740Troubleshooting Although Yamaha ATVs receive a thorough in-
spection before shipment from the factory, trouble
may occur during operation. Any problem in the fu-
el, compression, or ignition systems, for example,
can cause poor starting and loss of power.
The following troubleshooting charts represent
quick and easy procedures for checking these vital
systems yourself. However, should your ATV re-
quire any repair, take it to a Yamaha dealer, whose
skilled technicians have the necessary tools, expe-
rience, and know-how to service the ATV properly.
Use only genuine Yamaha replacement parts. Im-
itation parts may look like Yamaha parts, but they
are often inferior, have a shorter service life and
can lead to expensive repair bills.
WARNING
EWB02280Do not smoke when checking the fuel system.
Fuel can ignite or explode, causing severe inju-
ry or property damage. Make sure there are no
open flames or sparks in the area, including pi-
lot lights from water heaters or furnaces.
Tightening torques:
Front wheel nut:
45 Nm (4.5 m·kgf, 33 ft·lbf)
Rear wheel nut:
45 Nm (4.5 m·kgf, 33 ft·lbf)
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8
EBU27691Troubleshooting charts Starting problems or poor engine performance
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.2. Compression
There is compression.
There is no compression.
Check the ignition.
Have a Yamaha dealer
check the ATV.
Remove the spark plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the ATV.
The engine does not start.
Have a Yamaha dealer
check the ATV.
The engine does not start.
Check the battery.
Operate the electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and charge the battery if necessary.
DryWet
Operate the electric starter.
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