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1. Rear axle boot (
× 2 each side)
EVU00750Spark plug inspection
Removal
1. Remove the console. (See page 8-9 for console removal and installation 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 gapInstallation1. 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. Install the console.
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 element
There is a check hose at the bottom of the air
filter case and at the bottom of the air duct un-
der the case. If dust or water collects in a
check hose, empty the hose and clean the air
filter element and air filter case.1. Air filter case check hose1. Air filter case check hose
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1. Open the hood. (See pages 8-7–8-8 forhood opening and closing procedures.)
2. Remove the air intake duct shroud by re-
moving the quick fastener screws.1. Quick fastener screw ( × 2)
2. Air intake duct shroud
3. 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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2
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2
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4. Remove the air filter element.1. Air filter element
5. Remove the sponge material from the airfilter frame.1. Air filter frame 2. Sponge material
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2
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8-30
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.
7. Squeeze the excess solvent out of the sponge material. NOTICE: Do not twist
the sponge material when squeezing
it. 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.
10. Allow the sponge material to dry thor- oughly. Inspect the sponge material and
replace it if damaged.
11. Thoroughly apply Yamaha foam air filter oil 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 filter element.
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14. Insert the projections on the air filter casecover into the holders on the air filter
case, and then install the air filter case
cover by hooking the holders onto the
cover.1. Projection ( × 2) 2. Holder ( × 2)15. Install the air intake duct shroud by in-
stalling the quick fastener screws.
16. Close the hood. The 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.
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