YAMAHA WOLVERINE 2015 Owners Manual

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8
22. Stop the engine and allow it to cool. If thecoolant level has dropped after the en-
gine has cooled, add sufficient coolant
until it reaches the top of the radiator, and
then install the radiator cap.
23. Check the coolant level in the reservoir. If necessary, remove the coolant reservoir
cap, add coolant to the maximum level
mark, and then install the cap.
24. Start the engine, and then check for cool- ant leakage.TIPIf any leakage is found, have a Yamaha dealer
check the cooling system. 25. Install the panels and the hood.EBU32400Axle bootsCheck the axle boots for holes or tears.
If any damage is found, have them replaced
by a Yamaha dealer.
1. Front axle boot
1. Rear axle boot
1
1
1
1
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EBU33570Spark plug inspectionRemoval1. Remove the spark plug cap.
2. Use the spark plug wrench in the tool kit to remove the spark plug as shown. Inspection
The spark plug is an important engine com-
ponent 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 down1. Spark plug cap
1
1. Spark plug wrench
1
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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.
Measure the spark plug gap with a wire thick-
ness gauge and, if necessary, adjust the gap
to specification.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 cor-
rect 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.Specified spark plug: NGK/CPR7EA-91. Spark plug gap
1
Spark plug gap:0.8–0.9 mm (0.031–0.035 in)
Tightening torque: Spark plug:11 Nm (1.1 m·kgf, 8.0 ft·lbf)
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EBU33580Cleaning 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.NOTICEECB02270Never operate the engine with the air filter
element removed. Doing so would allow
unfiltered air to enter, causing rapid en-
gine wear and possible engine damage.
Additionally, the fuel injection system
would be affected, resulting in poor engine
performance and possible overheating.
1. Remove the storage compartment locat-ed between the driver seat and the pas-
senger seat as shown.
2. Remove the air filter case cover by un- hooking the holders.1. Storage compartment
1
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3. Remove the air filter element.4. While pushing the projections on the air
filter frame inward, remove the air filter el-
ement holder.
5. Remove the sponge material from the air filter frame.1. Air filter case cover
2. Air filter case cover holder
1. Air filter element
1
2
2
1
1. Air filter element holder
2. Projection
1
2
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6. Wash the sponge material gently butthoroughly in parts cleaning solvent.
WARNING! Using gasoline or other flammable solvents to clean the air fil-
ter element can cause a fire or explo-
sion, which could lead to serious
injury.
[EWB03360]
7. Squeeze the excess solvent out of the
sponge material. NOTICE: Do not twist
the sponge material when squeezing
it.
[ECB00442]
8. Wash the sponge material in warm soapy
water to remove remaining solvent, then
rinse thoroughly with plain warm water.
9. Squeeze excess water out of the sponge
material. NOTICE: Do not twist the
sponge material when squeezing it.
[ECB00442]
10. Allow the sponge material to dry thor- oughly. Inspect the sponge material and
replace it if damaged.
1. Air filter element holder
2. Sponge material
3. Air filter frame
3
2
1
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11. Thoroughly apply Yamaha foam air filteroil or other quality liquid foam air filter oil
(not spray type) to the sponge material.
The sponge material should be wet but
not dripping.
12. Pull the sponge material over its frame.
13. Install the air filt er element holder.
14. Install the air filter element.
15. Fit the holders on the air filter case cover
onto the projections on the air filter case,
and then install the air filter case cover by
hooking the holders onto the cover. 16. Install the storage compartment as
shown.
EBU33672Cleaning the air filter case/air duct
check hoseThere is a check hose at the bottom of the air
filter case and at the bottom of the air duct.
The check hoses can be accessed under the
vehicle. If dust or water collects in a check
hose, empty the hose and clean the air filter
element and air filter case.
1. Holder
2. Projection
1
2
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EBU33690V-belt case drain plugThe V-belt case drain plug is located behind
the left panel. (See page 8-11 for left panel re-
moval and installation procedures.)
After riding in water deep enough to allow wa-
ter to enter the V-belt case, remove the drain
plug to drain any water from the case.
If water drains from the V-belt case after re-
moving the drain plug, have a Yamaha dealer
inspect the vehicle, as the water may affect
other engine parts.
EBU32450Cleaning the spark arrester
WARNING
EWB03370Hot exhaust system may cause burns. To
avoid burns or fires, make sure that the en-
gine is stopped and the exhaust system is
cool before cleaning the spark arrester. Do
not start the engine while cleaning the ex-
haust system. 1. Remove the tailpipe bolts.
1. Air duct check hose
2. Air filter case check hose2
1
1. V-belt case drain plug
1
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2. Remove the tailpipe by pulling it out ofthe muffler, and then remove the gasket.
3. Tap the tailpipe lightly, and then use a
wire brush to remove any carbon depos-
its from the spark arrester portion of the
tailpipe and inside of the tailpipe housing. 4. Install the gasket, and then insert the tail-
pipe into the muffler and align the bolt
holes.
5. Install the bolts and tighten them to the
specified torque.1. Tailpipe bolt
1
1
1. Gasket
2. Spark arrester
3. TailpipeTightening torque:Tailpipe bolt:10 Nm (1.0 m·kgf, 7.2 ft·lbf)
3
2
1
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EBU32460Valve clearanceThe correct valve clearance changes with
use, resulting in improper fuel/air supply or
engine noise. To prevent this, the valve clear-
ance must be adjusted regularly. This adjust-
ment however, should be left to a
professional Yamaha service technician.EBU32470BrakesReplacement of brake components requires
professional knowledge. Brake service
should be performed by a Yamaha dealer.
WARNING
EWB02572Operating with improperly serviced or ad-
justed brakes could lead to a loss in brak-
ing ability and an accident.
EBU32480Checking the front and rear brake padsEach brake pad is provided with wear indica-
tor grooves, which allow you to check the
brake pad wear without having to disassem-
ble the brake. To check the brake pad wear,
check the wear indicator grooves. If a brake
pad has worn to the point that the wear indi-
cator grooves have almost disappeared, have
a Yamaha dealer replace the brake pads as a
set.
The wheels need to be removed to check the
brake pads. (See pages 8-44, 8-46 for wheel
removal and installation procedures.)
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