Page 140 of 174
8-48
8
EBU29882Brake light switchesThe brake light, which is activated by the brake
pedal and brake levers, should come on just be-
fore braking takes effect.
The rear brake light switch for the brake pedal can
be adjusted as follows, but the other brake light
switches should be adjusted by a Yamaha dealer.
Turn the rear brake light switch adjusting nut while
holding the brake light switch in place. To make
the brake light come on earlier, turn the adjusting
nut in direction (a). To make the brake light come
on later, turn the adjusting nut in direction (b).
1. Front axle boot (each side)
1. Rear axle boot (each side)
1
1
1
1
1. Rear brake light switch
2. Rear brake light switch adjusting nut
12
(a)
(b)
UBB562E0.book Page 48 Thursday, March 14, 2019 9:59 AM
Page 149 of 174
8-57
8
EBU30806Replacing a fuse
If an electrical problem is suspected, check the
fuse and replace it if necessary as follows.NOTICEECB00641To prevent accidental short-circuiting, turn off
the main switch when checking or replacing a
fuse. 1. Turn off all electrical systems. (See page 4-1.)
1. Fuel injection system spare fuse
2. Fuel injection system fuse
3. Main fuse
4. EPS fuse (equipped models)
5. Fuse box
1
2
3
4
5
1. Auxiliary DC jack fuse
2. Four-wheel-drive motor fuse
3. Ignition fuse
4. Radiator fan motor fuse
5. Signaling system fuse
6. Headlight fuse
7. Spare fuse
1
2
34
5
6
7
UBB562E0.book Page 57 Thursday, March 14, 2019 9:59 AM
Page 150 of 174
8-58
82. Remove the seat. (See page 4-18.)
3. 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.
[EWB02173]
4. Turn on the main switch, start the engine, andthen turn on the circuit in question.
5. If the fuse immediately blows again, have a Yamaha dealer check the vehicle.
Specified fuses:
Main fuse:40.0 A
Headlight fuse: 15.0 A
Ignition fuse: 10.0 A
Four-wheel-drive motor fuse: 10.0 A (B5R1/B5R2/B5R3)
3.0 A (BJ5H/BB5R/BJ5D/BJ5E/BB5M)
Signaling system fuse: 10.0 A
Radiator fan motor fuse: 20.0 A
Auxiliary DC jack fuse: 10.0 A
Fuel injection system fuse: 10.0 A
EPS fuse: 40.0 A (YFM450FWBD, YFM45KPAL)
UBB562E0.book Page 58 Thursday, March 14, 2019 9:59 AM
Page 151 of 174
8-59
8
EBU34223Replacing a headlight bulbIf a headlight bulb burns out, replace it with the
specified bulb as follows.
Left and right headlight bulbs1. Remove the cover at the rear of the headlight by pulling it off.
2. Remove the bulb cover by pulling it off. 3. Remove the socket by pushing it in and turn-
ing it counterclockwise.1. Cover at the rear of the headlight
1
1. Bulb cover
1. Socket
11
UBB562E0.book Page 59 Thursday, March 14, 2019 9:59 AM
Page 152 of 174
8-60
84. Remove the burnt-out bulb.
5. Place a new bulb into position.
NOTICE: Do
not touch the glass part of the bulb. Oil
from your fingers or other contamination
will adversely affect the transparency of
the glass, luminosity of the bulb, and bulb
life. Thoroughly clean off any dirt and fin-
gerprints using a cloth moistened with al-
cohol or thinner.
[ECB00653]
6. Install the socket by pushing it in and turning it clockwise. 7. Install the bulb cover and the cover at the rear
of the headlight. NOTICE: Make sure the
bulb cover is securely fitted over the sock-
et and seated properly.
[ECB03320]
8. Adjust the headlight beam if necessary.
Handlebar-mounted light bulb (equipped mod-
els) 1. Remove the handlebar-mounted light cover by removing the quick fasteners.
2. Remove the bulb cover by pulling it off.
1. Do not touch the glass part of the bulb.
1. Handlebar-mounted light cover
2. Quick fastener
1
2
2
UBB562E0.book Page 60 Thursday, March 14, 2019 9:59 AM
Page 154 of 174
8-62
88. Install the handlebar-mounted light cover as
shown, and then install the quick fasteners.
9. Adjust the handlebar-mounted light beam if necessary.
EBU25553Adjusting a headlight beamNOTICEECB00691It is advisable to have a Yamaha dealer make
this adjustment. To raise a headlight beam, turn the headlight
beam adjusting screw in direction (a).
To lower a headlight beam, turn the adjusting
screw in direction (b). For equipped models
1. Headlight beam adjusting screw
1. Handlebar-mounted light beam adjusting screw
(a)
(b)
1
1
(a)
(b)
UBB562E0.book Page 62 Thursday, March 14, 2019 9:59 AM
Page 155 of 174
8-63
8
EBU25615Replacing the brake/tail light bulbIf the brake/tail light bulb burns out, replace it as
follows.1. Remove the brake/tail light bulb holder (to- gether with the bulb) by turning it counter-
clockwise.
2. Remove the burnt-out bulb by pushing it in and turning it counterclockwise. 3. Insert a new bulb into the bulb holder, push it
in, and then turn it clockwise until it stops.
4. Install the bulb holder (together with the bulb) by turning it clockwise.
EBU25653Removing a wheel1. Park the ATV on a level surface.
2. Loosen the wheel nuts.
1. Brake/tail light bulb holder
1
1. Brake/tail light bulb
1
UBB562E0.book Page 63 Thursday, March 14, 2019 9:59 AM
Page 157 of 174

8-65
8
2. Lower the ATV to the ground.
3. Tighten the wheel nuts to the specified
torques.
EBU25741TroubleshootingAlthough Yamaha ATVs receive a thorough in-
spection before shipment from the factory, trouble
may occur during operation. Any problem in the
fuel, compression, or ignition systems, for exam-
ple, can cause poor starting and loss of power.
The following troubleshooting charts represent
quick and easy procedures for checking these vi-
tal systems yourself. However, should your ATV
require any repair, take it to a Yamaha dealer,
whose skilled technicians have the necessary
tools, experience, 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
EWB02281Do 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. Tapered nutTightening torques:Front wheel nut:55 N·m (5.5 kgf·m, 41 lb·ft)
Rear wheel nut: 55 N·m (5.5 kgf·m, 41 lb·ft)1
UBB562E0.book Page 65 Thursday, March 14, 2019 9:59 AM