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8
EBU30521Replacing a fuse
The main fuse, the fuel injection system fuse, the
EPS fuse, and the fuse box are located under pan-
el A. (See page 8-10.)
If a fuse is blown, replace it as follows.1. Turn the key to “ ” (off) and turn off all elec- trical circuits.
1. Fuse box
2. Main fuse
3. EPS fuse
4. Fuel injection system spare fuse
5. Fuel injection system fuse
2345
1
1. Headlight fuse
2. Signaling system fuse
3. Radiator fan motor fuse
4. Ignition fuse
5. Four-wheel-drive motor fuse
6. Auxiliary DC jack fuse
7. Spare fuse
123456
7
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8
NOTICEECB00641To prevent accidental short-circuiting, turn off
the main switch when checking or replacing a
fuse. 2. Remove the blown fuse, and then install anew 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]
3. Turn the key to “ ” (on) and turn on the elec-trical circuits to check if the devices operate.
4. If the fuse immediately blows again, have a Yamaha dealer check the electrical system.
Specified fuses:
Main fuse:40.0 A
Headlight fuse: 10.0 A
Ignition fuse: 10.0 A
Four-wheel-drive motor fuse: 10.0 A
Signaling system fuse: 10.0 A
Auxiliary DC jack fuse: 10.0 A
Radiator fan motor fuse: 20.0 A
Fuel injection system fuse: 15.0 A
EPS fuse: 40.0 A
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EBU34711Replacing a headlight bulbCenter headlight
If the headlight bulb burns out, replace it as fol-
lows.1. Remove the headlight cover by removing the quick fasteners.
2. Remove the bulb cover by pulling it off. 3. Remove the socket by pushing it in and turn-
ing it counterclockwise.1. Headlight cover
2. Quick fastener
1
2
2
1. Bulb cover
1. Socket
1
1
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8-60
84. Remove the burnt-out bulb.
5. 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.
[ECB00652]
6. Install the socket by pushing it in and turning it clockwise. 7. Install the bulb cover.
NOTICE: Make sure
the bulb cover is securely fitted over the
socket and seated properly.
[ECB03320]
8. Install the headlight cover as shown, and then install the quick fasteners.
9. Adjust the headlight beam if necessary.
Left and right headlights
This model is equipped with LED-type headlights
for the left and right headlights.
If the left or right headlight does not come on, have
a Yamaha dealer check it.
1. Do not touch the glass part of the bulb.
1
1. Headlight cover
1
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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).
EBU26921Tail/brake lightThis 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.EBU25652Removing a wheel1. Place the ATV on a level surface.
2. Loosen the wheel nuts.
1. Adjusting screw (center headlight)
(b)
(a)
1
1. Adjusting screw (left and right headlights)
(b)
(a)
1
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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.
EBU36241Installing a wheel1. Install the wheel and the nuts.TIP The arrow mark “ ” on the tire must point to-
ward the rotating direction of the wheel.
For YFM70GPXH / YFM70GPHH: tapered nuts
are used for both the front and rear wheels. In-
stall the nuts with their tapered side towards the
wheel.
1. Wheel nut
1
1
1. Arrow mark
1
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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 Nm (5.5 m·kgf, 40 ft·lbf)
Rear wheel nut: 55 Nm (5.5 m·kgf, 40 ft·lbf)1
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EBU27695Troubleshooting chartsStarting 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 battery.
Supply fuel.
The engine does not start.
Check the battery.
Operate the electric starter.4. Compression
There is compression.
There is no compression.
The engine does not start.
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.
Check the compression.
DryWet
Operate the electric starter.
Have a Yamaha dealer check the ATV.
The engine does not start.
Check the ignition.
Operate the electric starter.2. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and have a Yamaha dealer charge
the battery if necessary.
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