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EBU18102Start switch “ ”
Push this switch to crank the engine with the start-
er. See the starting instructions on page 6-1 prior
to starting the engine.EBU34120Light switch “ / /OFF”
Set this switch to “ ” to turn on the left and right
headlights (low beams) and the taillight. Set the
switch to “ ” to turn on the left and right head-
lights (high beams), the center headlight
(YFM70KPXG / YFM70KPHG / YFM70KPSG),
and the taillight. Set the switch to “OFF” to turn off
all the lights.NOTICEECB00044Do not use the headlights with the engine
turned off for an extended period of time, oth-
erwise the battery may discharge to the point
that the starter motor will not operate properly.
If this should happen, remove the battery and
recharge it. (See page 8-54.) EBU18171Horn switch “ ”
Press the switch to sound the horn.
EBU18192Override switch “OVERRIDE” (YFM70KPSG)
Top speed is normally limited when operating in
differential gear lock. If conditions require more
engine power when riding forward, push and hold
this switch to override the differential gear lock
speed limiting function. (See page 4-12.) Releas-
ing the switch restores the speed limiting function.
While the override switch is pushed, the segments
of the speedometer digits will appear as shown in
the figure.1. Override switch “OVERRIDE”
1
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8-67
8
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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9
EBU27262StorageShort-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. Follow all the instructions in the “Cleaning” section of this chapter.
2. Fill up the fuel tank and add fuel stabilizer (if available) to prevent the fuel from deteriorat-
ing. 3. Perform the following steps to protect the cyl-
inder, piston rings, etc. from 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.
4. Lubricate all control cables and the pivoting points of all levers and pedals.
5. Check and, if necessary, correct the tire air pressure, and then block up the ATV so that
all of its wheels are off the ground. Alterna-
tively, turn the wheels a little every month in
order to prevent the tires from becoming de-
graded in one spot.
Specified amount:
7.5 ml of stabilizer to each liter of fuel (or 1
oz of stabilizer to each gallon of fuel)UB1660E0.book Page 2 Thursday, February 26, 2015 4:01 PM
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10-1
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EBU25962
SPECIFICATIONS
Dimensions:Overall length:2070 mm (81.5 in)
Overall width: 1180 mm (46.5 in)
Overall height:
1240 mm (48.8 in)
Seat height: 860 mm (33.9 in)
Wheelbase: 1250 mm (49.2 in)
Ground clearance:
275 mm (10.8 in)
Minimum turning radius: 3200 mm (126 in)Weight:Curb weight:
300.0 kg (661 lb) (YFM70KDHG, YFM70KDXG)
307.0 kg (677 lb) (YFM70KPHG, YFM70KPXG)
312.0 kg (688 lb) (YFM70KPSG)Noise and vibration level:Noise level (77/311/EEC):80.0 dB(A) at 3125 r/min (EUR/FRA/GBR)
Uncertainty of measurement: 3.0 dB(A) (EUR/FRA/GBR)
Vibration on seat (EN1032, ISO5008): Will not exceed 0.5 m/s² (EUR/FRA/GBR) Uncertainty of measurement:
0.0 m/s² (YFM70KPHG, YFM70KPSG_EUR/FRA/GBR,
YFM70KPXG_EUR/FRA/GBR)
0.1 m/s² (YFM70KDHG, YFM70KDXG_EUR/FRA/GBR)
Vibration on handle (EN1032, ISO5008): Will not exceed 2.5 m/s² (EUR/FRA/GBR)
Uncertainty of measurement:
0.3 m/s² (EUR/FRA/GBR)
Engine:Engine type:Liquid cooled 4-stroke, DOHC
Cylinder arrangement:
Single cylinder
Displacement: 708 cm³
Bore × stroke:
103.0 × 85.0 mm (4.06 × 3.35 in)
Compression ratio:
10.1 : 1
Starting system: Electric starter
Lubrication system: Wet sumpEngine oil:Recommended brand:YAMALUBE
UB1660E0.book Page 1 Thursday, February 26, 2015 4:01 PM