Page 134 of 154

8-47
8
If a fuse is blown, replace it as follows.
1. Turn the key to “OFF” 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 “ON” 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.
1. Signaling system fuse
2. Headlight fuse
3. Ignition fuse
4. Fuel injection system fuse
5. Spare fuse
1
2
3
4 5
Specified fuses:
Main fuse:
20.0 A
Headlight fuse:
15.0 A
Ignition fuse:
10.0 A
Signaling system fuse:
10.0 A
Fuel injection system fuse:
10.0 A
U1AS61E0.book Page 47 Thursday, February 11, 2010 2:17 PM
Page 135 of 154
8-48
8
EBU29670Replacing a headlight bulb If a headlight bulb burns out, replace it as follows.
1. Remove the headlight unit by removing the
bolts.
2. Disconnect the headlight coupler.
3. Remove the headlight bulb holder cover.4. Remove the headlight bulb holder by pushing
it in and turning it counterclockwise, and then
remove the burnt-out bulb.1. Headlight unit
2. Bolt
1
2
1. Headlight bulb holder cover
2. Headlight coupler
1 2
U1AS61E0.book Page 48 Thursday, February 11, 2010 2:17 PM
Page 136 of 154
8-49
85. 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]
6. Install the headlight bulb holder by pushing it
in and turning it clockwise.
7. Install the headlight bulb holder cover.
8. Connect the headlight coupler.
9. Install the headlight unit by installing the bolts.
10. Adjust the headlight beam if necessary.EBU25561Adjusting a headlight beam NOTICEECB00690It is advisable to have a Yamaha dealer make
this adjustment.
1. Headlight bulb holder
1
1. Do not touch the glass part of the bulb.
U1AS61E0.book Page 49 Thursday, February 11, 2010 2:17 PM
Page 137 of 154
8-50
8 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).
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.
3. Elevate the ATV and place a suitable stand
under the frame.
4. Remove the nuts from the wheel.
5. Remove the wheel.
EBU27481Installing a wheel 1. Place the ATV on a level surface.
2. Install the wheel and the nuts.
1. Headlight beam adjusting bolt1
(a)(b)
1. Wheel nut
U1AS61E0.book Page 50 Thursday, February 11, 2010 2:17 PM
Page 138 of 154

8-51
8
TIPWhen installing the wheel, make sure its arrow
mark points toward the rotating direction of the
wheel.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.
1. Arrow markTightening 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)
U1AS61E0.book Page 51 Thursday, February 11, 2010 2:17 PM
Page 147 of 154
10-4
10
Rear wheel:Wheel type:
Panel wheel
Rim size:
9 x 8.0ATFront brake:Type:
Dual disc brake
Operation:
Right hand operation
Recommended fluid:
DOT 4Rear brake:Type:
Single disc brake
Operation:
Right foot operation
Recommended fluid:
DOT 4Front suspension:Type:
Double wishbone
Spring/shock absorber type:
Coil spring/gas-oil damper
Wheel travel:
230 mm (9.1 in)Rear suspension:Type:
Swingarm (link suspension)
Spring/shock absorber type:
Coil spring/gas-oil damperWheel travel:
256 mm (10.1 in)
Electrical system:Ignition system:
TCI
Charging system:
AC magnetoBattery:Model:
GT9B-4
Voltage, capacity:
12 V, 8.0 AhHeadlight:Bulb type:
Krypton bulbBulb voltage, wattage × quantity:Headlight:
12 V, 30/30 W × 2
Tail/brake light:
LED
Meter lighting:
EL
Neutral indicator light:
LED
Fuel level warning light:
LED
Reverse indicator light:
LED
Coolant temperature warning light:
LED
U1AS61E0.book Page 4 Thursday, February 11, 2010 2:17 PM
Page 148 of 154
10-5
10
Engine trouble warning light:
LEDFuses:Main fuse:
20.0 A
Fuel injection system fuse:
10.0 A
Headlight fuse:
15.0 A
Signaling system fuse:
10.0 A
Ignition fuse:
10.0 A
U1AS61E0.book Page 5 Thursday, February 11, 2010 2:17 PM
Page 151 of 154

INDEX
AAccessories and loading ................................................ 6-7
Air filter element, cleaning ............................................ 8-20BBattery .......................................................................... 8-43
Brake and clutch levers, checking and lubricating ....... 8-40
Brake fluid, changing ................................................... 8-32
Brake fluid level, checking ........................................... 8-30
Brake lever ..................................................................... 4-8
Brake lever free play, checking the front ...................... 8-32
Brake light switches ..................................................... 8-34
Brake pads, checking the front and rear ...................... 8-29
Brake pedal .................................................................... 4-8
Brake pedal, checking and lubricating ......................... 8-40
Brake pedal position, checking .................................... 8-32
Brakes .......................................................................... 8-28
Brakes, front and rear .................................................... 5-4CCables, checking and lubricating ................................. 8-39
Chassis fasteners .......................................................... 5-7
Cleaning ......................................................................... 9-1
Clutch lever .................................................................... 4-7
Clutch lever free play, adjusting ................................... 8-35
Coolant .................................................................. 5-4, 8-16
Coolant temperature warning light ................................. 4-2DDrive chain ..................................................................... 5-5
Drive chain, lubricating ................................................. 8-38Drive chain slack .......................................................... 8-36
EEngine break-in .............................................................. 6-5
Engine idling speed ..................................................... 8-26
Engine oil ....................................................................... 5-4
Engine oil and oil filter element .................................... 8-12
Engine, start ................................................................... 6-1
Engine stop switch ......................................................... 4-6
Engine trouble warning light .......................................... 4-3FFuel ....................................................................... 4-11, 5-4
Fuel level warning light .................................................. 4-3
Fuel tank cap ............................................................... 4-11
Fuses, replacing .......................................................... 8-46HHandlebar switches ....................................................... 4-5
Headlight beam, adjusting ........................................... 8-49
Headlight bulb, replacing ............................................. 8-48IIdentification numbers .................................................. 11-1
Indicator lights and warning lights .................................. 4-2
Instruments, lights and switches .................................... 5-7LLabel locations ............................................................... 1-1
Light switch .................................................................... 4-6MMain switch .................................................................... 4-1
Maintenance and lubrication chart ................................. 8-5
U1AS61E0.book Page 1 Thursday, February 11, 2010 2:17 PM