2014 YAMAHA VIKING Owners Manual

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4. Install the differential gear oil drain boltand its new gasket, and then tighten the
bolt to the specified torque.
5. Refill the differential gear case with the recommended oil. NOTICE: Be sure no
foreign material enters the differential
gear case.
6. Check the oil filler bolt gasket for dam- age, and replace it if necessary. 7. Install the differential gear oil filler bolt
and its gasket, and then tighten the bolt
to the specified torque.
8. Check for oil leakage. If oil leakage is found, check for the cause.
Tightening torque:
Differential gear oil drain bolt: 9.8 Nm (0.98 m·kgf, 7.1 ft·lbf)
Recommended oil: SAE 80 API GL-4 Hypoid gear oil
Oil quantity: 0.18 L (0.19 US qt, 0.16 Imp.qt)
Tightening torque:
Differential gear oil filler bolt: 23 Nm (2.3 m·kgf, 17 ft·lbf)
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5B410015CoolantThe coolant level should be checked before
each ride.
Checking the coolant level 1. Park the vehicle on a level surface.
2. Check the coolant level in the coolant
reservoir when the engine is cold as the
coolant level varies with engine tempera-
ture. TIPThe coolant should be between the minimum
and maximum level marks.
1. Coolant reservoir cap
2. Maximum level mark 3. Minimum level mark3. If the coolant is at or below the minimum level mark, remove the coolant reservoir
cap, add coolant to the maximum level
mark, install the reservoir cap.
Coolant reservoir capacity
(up to the maximum level mark): 0.28 L (0.30 US qt, 0.25 Imp.qt)
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Changing the coolant
The coolant must be changed by a Yamaha
dealer at the intervals specified in the periodic
maintenance and lubrication chart.
Adding water instead of coolant lowers the
antifreeze content of the coolant. If water is
used instead of coolant, have a Yamaha deal-
er check the antifreeze content of the coolant
as soon as possible.
The radiator fan is automatically switched on
or off according to the coolant temperature in
the radiator.NOTICEMix antifreeze with distilled water only.
However, if distilled water is not available,
soft water may be used for refilling.If your vehicle overheats, see page 8-57 for
instructions.
EVU00740Axle bootsCheck the axle boots for holes or tears.
If any damage is found, have them replaced
by a Yamaha dealer.1. Front axle boot (× 2 each side)
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1. Rear axle boot ( × 2 each side)
EVU00750Spark plug inspectionRemoval
1. Lift the cargo bed up. (See page 4-26 for cargo bed lifting and lowering proce-
dures.)
2. Remove the spark plug cap.1. Spark plug cap3. Use the spark plug wrench in the tool kit to remove the spark plug as shown.
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1. Spark plug wrench
Inspection
The spark plug is an important engine compo-
nent and is easy to inspect. The condition of
the spark plug can indicate the condition of
the engine.
The ideal color of the porcelain insulator
around the center electrode is a medium-to-
light tan for a vehicle that is being ridden nor-
mally.
You should periodically remove and inspect
the spark plug because heat and deposits will
cause the spark plug to slowly break down
and erode. If electrode erosion becomes ex-
cessive, or if carbon and other deposits are
excessive, you should replace the spark plug
with the specified plug.
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Specified spark plug:CPR7EA-9 (NGK)
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Measure the spark plug gap with a wire thick-
ness gauge and, if necessary, adjust the gap
to specification.a. Spark plug gap
Installation 1. Clean the surface of the spark plug gas- ket and its mating surface, and then wipe
off any grime from the spark plug
threads.
2. Install the spark plug and tighten it to the
specified torque. If a torque wrench is not
available when you are installing the
spark plug, a good estimate of the correct
torque is one-quarter to one-half turn
past finger tight. Have the spark plug
tightened to the specified torque as soon
as possible.
3. Install the spark plug cap.
4. Lower the cargo bed.
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
Tightening torque:Spark plug: 13 Nm (1.3 m·kgf, 9.4 ft·lbf)
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5B410016Cleaning the air filter elementThe air filter element should be cleaned every
20–40 hours. It should be cleaned and lubri-
cated more often if the vehicle is operated in
extremely dusty areas. Each time air filter ele-
ment maintenance is performed, check the air
inlet to the air filter case for obstructions.
Check the air filter element rubber joint to the
throttle body and manifold fittings for an air-
tight seal. Tighten all fittings securely to avoid
the possibility of unfiltered air entering the en-
gine.NOTICENever operate the engine with the air filter
element removed. This will allow unfiltered
air to enter, causing rapid engine wear and
possible engine damage. Additionally, op-
eration without the air filter element will af-
fect the fuel injection system with
subsequent poor performance and possi-
ble engine overheating.
1. Remove the center passenger seat cush-
ion. (See page 4-18 for seat cushion re-
moval and installation procedures.)
2. Remove the air filter case cover by un- hooking the holders.1. Air filter case cover holder ( × 5)
2. Air filter case cover
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3. Remove the air filter element.1. Air filter element
4. While pushing the projections on the air filter frame inward, remove the air filter el-
ement holder.1. Air filter element holder 2. Projection ( × 2)
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