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EBU29704Adjusting the throttle lever free playPeriodically check the throttle lever free play and
adjust if necessary.1. Slide the rubber cover back.
2. Loosen the locknut. 3. To increase the throttle lever free play, turn
the throttle lever free play adjusting bolt in di-
rection (a). To decrease the throttle lever free
play, turn the adjusting bolt in direction (b).
4. Tighten the locknut.
5. Slide the rubber cover to its original position.
EBU24061Valve clearanceThe valve clearance changes with use, resulting in
improper air-fuel mixture and/or engine noise. To
prevent this from occurring, the valve clearance
must be adjusted by a Yamaha dealer at the inter-
vals specified in the periodic maintenance and lu-
brication chart.EBU29602BrakesReplacement of brake components requires pro-
fessional knowledge. Brake service should be
performed by a Yamaha dealer.
WARNING
EWB02572Operating with improperly serviced or adjust-
ed brakes could lead to a loss in braking ability
and an accident.
1. Rubber cover
2. Throttle lever free play adjusting bolt
3. Locknut
4. Throttle lever free playThrottle lever free play: 3.0–5.0 mm (0.12–0.20 in)
2WD
4WD
3
2
1
4
(b)
(a)
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8-56
85. Install the panel.
TIP
Make sure the positive and negative battery
leads are installed as shown.
Fully charge the battery before installing it.
EBU30524Replacing a fuse
Tightening torques:
Carrier bolt (upper):34 N·m (3.4 kgf·m, 25 lb·ft)
Carrier bolt (lower): 34 N·m (3.4 kgf·m, 25 lb·ft)
Carrier bolt (under the fenders): 7 N·m (0.7 kgf·m, 5.2 lb·ft)
1. Fuse box
2. Main fuse
3. EPS fuse
4. Fuel injection system spare fuse
5. Fuel injection system fuse
2345
1
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8-58
84. Turn on the main switch and start the engine.
5. If the fuse immediately blows again, have aYamaha dealer check the vehicle.
EBU34712Replacing a headlight bulbLeft and right headlights
This model is equipped with LED-type headlights.
If a headlight does not come on, have a Yamaha
dealer check the vehicle and replace the headlight
if necessary.
Handlebar-mounted light
If the handlebar-mounted light bulb burns out, re-
place it with the specified bulb as follows.1. Remove the handlebar-mounted light cover by removing the quick fasteners.
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 A1. Handlebar-mounted light cover
2. Quick fastener
1
2
2
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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. UB4F60E0.book Page 63 Wednesday, April 25, 2018 11:52 AM
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8
EBU27696Troubleshooting 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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EBU27264StorageShort-term
Always store your ATV in a cool, dry place and, if
necessary, protect it against dust with a porous
cover. NOTICE: Storing the ATV in a poorly ven-
tilated room or covering it with a tarp while it is
still wet, will allow water and humidity to seep
in and cause rust. To prevent corrosion, avoid
damp cellars, stables (because of the presence
of ammonia) and areas where strong chemi-
cals are stored.
[ECB00722]
Long-term
Before storing your ATV for several months: 1. Make any necessary repairs and perform all outstanding maintenance.
2. Follow all the instructions in the Cleaning sec- tion of this chapter.
3. Fill up the fuel tank and add fuel stabilizer (Fu- el Med Rx if available), and then run the en-
gine for 5 minutes to distribute the treated
fuel. 4. Perform the following steps to protect the en-
gine from internal corrosion.a. Remove the spark plug cap and spark plug.
b. Pour a teaspoonful of engine oil into the spark plug bore.
c. Install the spark plug cap onto the spark plug, and then place the spark plug on the
cylinder head so that the electrodes are
grounded. (This will limit sparking during
the next step.)
d. Turn the engine over several times with the starter. (This will coat the cylinder wall
with oil.)
e. Remove the spark plug cap from the spark plug, and then install the spark plug and
the spark plug cap.
5. Lubricate all control cables and the pivoting points of all levers and pedals.
6. Put the frame on stands or blocks to raise all wheels off the ground. (Alternatively, turn the
wheels each month to prevent the tires from
degrading in one spot.)
7. Cover the muffler outlet with a plastic bag to prevent moisture from entering it.
Specified amount:
7.5 ml per liter of fuel (1 oz per gallon)UB4F60E0.book Page 2 Wednesday, April 25, 2018 11:52 AM
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10
Quantity:0.21 L (0.23 US qt, 0.19 Imp.qt)Coolant quantity:Radiator (including all routes):
1.99 L (2.10 US qt, 1.75 Imp.qt)
Coolant reservoir (up to the maximum level mark): 0.24 L (0.25 US qt, 0.21 Imp.qt)Air filter:Air filter element:
Wet element
Air filter oil grade: Foam air-filter oilFuel:Recommended fuel:
Regular unleaded gasoline only
Minimum research octane: 91
Fuel tank capacity: 18 L (4.8 US gal, 4.0 Imp.gal)
Fuel reserve amount:
4.0 L (1.06 US gal, 0.88 Imp.gal)Throttle body:ID mark:B4F100Spark plug (s):Manufacturer/model:NGK/CPR7EA-9
Spark plug gap: 0.8–0.9 mm (0.031–0.035 in)
Drivetrain:Primary reduction ratio:1.000
Secondary reduction ratio:
10.142 (41/21 x 17/12 x 20/15 x 33/12)
Final drive: Shaft
Clutch type: Wet, centrifugal, shoe
Transmission type:
CVT automatic with reverse
Gear ratio: Transmission ratio:
2.380–0.700 : 1
Reverse gear: 2.000 (23/14 x 28/23)
Low range: 1.938 (31/16)
High range:
1.148 (31/27)Front tire:Size:AT26 x 8-12 (YFM70GPAK, YFM70GPHK, YFM70GPXK)
AT27 x 10-14 (YFM70GPLK)
Manufacturer/model: MAXXIS/MU01 (YFM70GPLK)
MAXXIS/MU05Y (YFM70GPAK, YFM70GPHK,
YFM70GPXK)
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Battery voltage warning light:LEDFuses:Main fuse:
40.0 A
Headlight fuse: 10.0 A
Signaling system fuse: 10.0 A
Ignition fuse:
10.0 A
Auxiliary DC jack fuse: 10.0 A
Fuel injection system fuse: 15.0 A
Four-wheel-drive motor fuse:
10.0 A
Radiator fan motor fuse: 20.0 A
EPS fuse: 40.0 AEBU30403Noise and vibration levels statement (for Eu-
rope)
The figures quoted are emission levels and are not
necessarily safe working levels. Whilst there is a
correlation between the emission and exposure
levels, this cannot be used reliably to determine whether or not further precautions are required.
Factors that influence the actual level of exposure
of work-force include the characteristics of the
work room, the other sources of noise, etc. i.e. the
number of machines and other adjacent process-
es, and the length of time for which an operator is
exposed to the noise. Also the permissible expo-
sure level can vary from country. This information,
however, will enable the user of the machine to
make a better evaluation of the hazard and risk.UB4F60E0.book Page 6 Wednesday, April 25, 2018 11:52 AM