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5-3
5
EBU38000FuelMake sure there is sufficient gasoline in the tank
before starting off. Refuel if necessary. (See page
4-22.)EBU19561Engine oilMake sure that the engine oil is at the specified
level. Add oil as necessary. (See page 8-19.)EBU19591Final gear oilMake sure that the final gear oil is at the specified
level. Add oil as necessary. (See page 8-24.)EBU19601Differential gear oilMake sure that the differential gear oil is at the
specified level. Add oil as necessary. (See page
8-26.)EBU19632CoolantMake sure that the coolant is at the specified level.
Add coolant as necessary. (See page 8-28.)
TIPThe coolant level must be checked on a cold en-
gine since the level varies with engine tempera-
ture. EBU28533Front and rear brakesBrake levers and brake pedal
Check that there is no free play in the front
brake lever. If there is free play, have a Yamaha
dealer check the brake system.
Check for correct free play in the rear brake le-
ver and brake pedal. If the free play is incorrect,
adjust it. (See page 8-44.)
Check operation of the levers and pedal. They
should move smoothly and there should be a
firm feeling when the brake is applied. If not,
have a Yamaha dealer check them.
Brake fluid level (front brake)
Check the brake fluid level. Add fluid if necessary.
(See page 8-43.)
Specified brake fluid:DOT 4
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6-1
6
EBU19882
OPERATION
EBU19902Read the Owner’s Manual carefully before riding
the ATV. If there is a control or function you do not
understand, ask your Yamaha dealer.
WARNING
EWB00632Read the Owner’s Manual carefully to become
familiar with all controls in order to help pre-
vent any loss of control, which could cause an
accident or injury. EBU38301Starting the engineThis model is equipped with an ignition circuit cut-
off system. To enable starting one of the following
conditions must be met:
The drive select lever is in the neutral or park po-
sition.
The rear brake lever or brake pedal is applied.TIPIt is recommended to shift into neutral or park and
apply the rear brake when starting the engine.
NOTICEECB00151See the “Engine break-in” section on page 6-4
prior to operating the engine for the first time. To start the engine
1. Turn the key to “ ” (on) and the engine stop switch to “ ” (run).
YFM70KDXK / YFM70KDHK
The coolant temperature warning light, the
engine trouble warning light, and the fuel level
warning light should come on for a few sec-
onds, then go off.
YFM70KPXK / YFM70KPAK /
YFM70KPHK / YFM70KPSK / YFM70KPLK
The battery voltage warning light, the cool-
ant temperature warning light, and the en-
gine trouble warning light should come on
for a few seconds, then go off.
The electric power steering warning light
should come on and stay on until the en-
gine is started.
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8-7
8
14*Steering shaft • Lubricate with lithium-soap-based grease. √√√
15 *Steering system • Check operation and repair or replace if dam-
aged.
• Check toe-in and adjust if necessary. √√√√√
16 *Engine mount • Check for cracks or other damage, and replace if
necessary. √√√
17 *Axle boots • Check for cracks or other damage, and replace if
necessary. √√√√√
18 Engine oil • Change.
• Check ATV for oil leakage, and correct if neces-
sary. √ √√√
19 Engine oil filter car-
tridge • Replace.
√√√
20 Differential gear oil • Change.
• Check ATV for oil leakage, and correct if neces-
sary. √√
21 Final gear oil • Change.
• Check ATV for oil leakage, and correct if neces-
sary. √ √√√
22 Cooling system • Check coolant level and ATV for coolant leakage,
and correct if necessary. √√√√√
• Replace coolant. Every 2 years
NO.
ITEM CHECK OR MAINTENANCE
JOB INITIAL
EVERY
Whichev- er comes first month136612
km (mi) 240
(150) 1300
(800) 2500
(1600) 2500
(1600) 5000
(3200)
hours 20 80 160 160 320UB5K60E0.book Page 7 Monday, May 28, 2018 11:35 AM
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8-29
8
TIPIf genuine Yamaha coolant is not available, use an
ethylene glycol antifreeze containing corrosion in-
hibitors for aluminum engines and mix with dis-
tilled water at a 1:1 ratio. NOTICEECB02190Mix antifreeze with distilled water only. Howev-
er, if distilled water is not available, soft water
may be used for refilling. Do not use hard water
or salt water since they are harmful to the en-
gine. EBU34201To check the coolant level1. Park the ATV on a level surface.
TIPThe coolant level must be checked on a cold en-
gine since the level varies with engine tempera-
ture. 2. Check the coolant level in the coolant reser- voir.TIPThe coolant should be between the minimum and
maximum level marks.
Recommended coolant:YAMALUBE coolant
Coolant quantity: Coolant reservoir (up to full level):0.24 L (0.25 US qt, 0.21 Imp.qt)
Radiator (including all routes): 1.99 L (2.10 US qt, 1.75 Imp.qt)
1. Maximum level mark
2. Minimum level mark
12
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8-30
83. If the coolant is at or below the minimum level
mark, remove panels A and C to access the
coolant reservoir. (See page 8-9.)
4. Remove the coolant reservoir cap, add cool- ant or distilled water to the maximum level
mark, install the reservoir cap, and then install
the panels. NOTICE: If coolant is not avail-
able, use distilled water or soft tap water
instead. Do not use hard water or salt wa-
ter since they are harmful to the engine. If
water has been used instead of coolant,
replace it with coolant as soon as possible,
otherwise the cooling system will not be
protected against frost and corrosion. If
water has been added to the coolant, have
a Yamaha dealer check the antifreeze con-
tent of the coolant as soon as possible,
otherwise the effectiveness of the coolant
will be reduced.
[ECB01012]
TIP The radiator fan is automatically switched on or
off according to the coolant temperature in the
radiator.
If the engine overheats, see page 8-67 for fur-
ther instructions. 1. Coolant reservoir capCoolant reservoir capacity (up to the maxi-
mum level mark):
0.24 L (0.25 US qt, 0.21 Imp.qt)
1
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8-31
8
EBU34213To change the coolant
WARNING
EWB01891Wait for the engine and radiator to cool before
removing the radiator cap. You could be
burned by hot fluid and steam blown out under
pressure. Always place a thick rag over the cap
when opening. Allow any remaining pressure
to escape before completely removing the cap. 1. Park the ATV on a level surface.
2. Remove panels A, B, C, and D. (See page8-9.)
3. Remove the footboard by removing the bolts and nuts. 4. Remove the radiator cap.
1. Footboard
2. Bolt and nut
3. Bolt
3
2
2
3
1
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8-32
85. Place a container under the engine, and then
remove the coolant drain bolt and its gasket.
(Use a trough or a similar object as shown to
prevent coolant from spilling on the engine
guard.)
1. Radiator cap
1
1. Coolant drain bolt
2. Gasket
1. Trough
1
2
1
UB5K60E0.book Page 32 Monday, May 28, 2018 11:35 AM
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8-34
815. When coolant begins to flow out of the bolt
hole, tighten the water pump air bleed bolt to
the specified torque.
16. Remove panel E. (See page 8-9.)
17. Loosen the clamp screw, and then remove the V-belt cooling duct. 18. Loosen the cylinder head air bleed bolt, with-
out removing it, to allow all of the air to es-
cape from the air bleed bolt hole.
19. When coolant begins to flow out of the bolt hole, tighten the cylinder head air bleed bolt
to the specified torque.
20. Start the engine and let it idle for ten minutes.
21. Rev the engine five times.
Tightening torque:
Water pump air bleed bolt:10 N·m (1.0 kgf·m, 7.4 lb·ft)
1. V-belt cooling duct
2. Clamp screw
1
2
1. Cylinder head air bleed boltTightening torque:Cylinder head air bleed bolt:10 N·m (1.0 kgf·m, 7.4 lb·ft)
1
UB5K60E0.book Page 34 Monday, May 28, 2018 11:35 AM