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Periodic maintenance and adjustment
6-10
6
EAU19653
Checking the spark plugs
The spark plugs are important engine
components, which should be
checked periodically, preferably by a
Yamaha dealer. Since heat and depos-
its will cause any spark plug to slowly
erode, they should be removed and
checked in accordance with the peri-
odic maintenance and lubrication
chart. In addition, the condition of the
spark plugs can reveal the condition of
the engine.
The porcelain insulator around the
center electrode of each spark plug
should be a medium-to-light tan (the
ideal color when the vehicle is ridden
normally), and all spark plugs installed
in the engine should have the same
color. If any spark plug shows a dis-
tinctly different color, the engine could
be operating improperly. Do not at-
tempt to diagnose such problems
yourself. Instead, have a Yamaha deal-
er check the vehicle.
If a spark plug shows signs of elec-
trode erosion and excessive carbon or
other deposits, it should be replaced.
Before installing a spark plug, the
spark plug gap should be measured
with a wire thickness gauge and, if
necessary, adjusted to specification.Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the spark
plug threads.
TIP
If a torque wrench is not available
when installing a spark plug, a good
estimate of the correct torque is 1/4…
1/2 turn past finger tight. However, the
spark plug should be tightened to the
specified torque as soon as possible.
NOTICE
ECA10841
Do not use any tools to remove or in-
stall the spark plug cap, otherwise
the ignition coil coupler may get
damaged. The spark plug cap may
be difficult to remove because the
rubber seal on the end of the cap fits
tightly. To remove the spark plug
cap, simply twist it back and forth
while pulling it out; to install it, twist
it back and forth while pushing it in.
Specified spark plug:
NGK/CPR8EA-9
1. Spark plug gap
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
Tightening torque:
Spark plug:
13 N·m (1.3 kgf·m, 9.6 lb·ft)
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Periodic maintenance and adjustment
6-11
6
EAU82180
Canister
This model is equipped with a canister
to prevent the discharging of fuel vapor
into the atmosphere. Before operating
this vehicle, make sure to check the
following:
each hose connection, tighten if
loose.
each hose and the canister body
for damage, replace if damaged.
the canister breather hose is not
blocked off, clean if necessary.
EAU1988A
Engine oil and oil filter car-
tridge
The engine oil level should be checked
before each ride. In addition, the oil
must be changed and the oil filter car-
tridge replaced at the intervals speci-
fied in the periodic maintenance and
lubrication chart.
To check the engine oil level
1. Place the vehicle on the center-
stand. A slight tilt to the side can
result in a false reading.
2. Start the engine, warm it up for
several minutes, and then turn it
off.
3. Wait a few minutes for the oil level
to settle for an accurate reading,
and then check the oil level
through the check window locat-
ed at the bottom-left side of the
crankcase.
TIP
The engine oil should be between the
minimum and maximum level marks.
1. Canister
2. Canister breather hose
2121
2
1. Engine oil level check window
2. Engine oil filler cap
3. Maximum level mark
4. Minimum level mark
31
4
2
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Periodic maintenance and adjustment
6-12
6 4. If the engine oil is below the mini-
mum level mark, add sufficient oil
of the recommended type to raise
it to the correct level.
TIP
Check the O-ring for damage, and re-
place it if necessary.
To change the engine oil (with or
without oil filter cartridge replace-
ment)
1. Place the vehicle on a level surfa-
ce.
2. Start the engine, warm it up for
several minutes, and then turn it
off.
3. Place an oil pan under the engine
to collect the used oil.
4. Remove the engine oil filler cap,
the engine oil drain bolt and its
gasket to drain the oil from the
crankcase.
TIP
Skip steps 5…7 if the oil filter cartridge
is not being replaced.
5. Remove the oil filter cartridge with
an oil filter wrench.
TIP
An oil filter wrench is available at a
Yamaha dealer.
6. Apply a thin coat of clean engine
oil to the O-ring of the new oil filter
cartridge.
1. Engine oil filler cap
2. O-ring
2
11. Engine oil drain bolt
2. Gasket
1. Oil filter wrench
2. Oil filter cartridge
1
2
1
2
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Periodic maintenance and adjustment
6-13
6
TIP
Make sure that the O-ring is properly
seated.
7. Install the new oil filter cartridge,
and then tighten it to the specified
torque with a torque wrench.
8. Install the engine oil drain bolt and
its new gasket, and then tighten
the bolt to the specified torque.
9. Refill with the specified amount of
the recommended engine oil.
TIP
Be sure to wipe off spilled oil on any
parts after the engine and exhaust sys-
tem have cooled down.
NOTICE
ECA11621
In order to prevent clutch slip-
page (since the engine oil also
lubricates the clutch), do not
mix any chemical additives. Do
not use oils with a diesel speci-
fication of “CD” or oils of a high-
er quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.
Make sure that no foreign mate-
rial enters the crankcase.
10. Check the O-ring for damage, and
replace it if necessary.
11. Install and tighten the engine oil
filler cap.
1. O-ring
1. Torque wrench
Tightening torque:
Oil filter cartridge:
17 N·m (1.7 kgf·m, 13 lb·ft)
Tightening torque:
Engine oil drain bolt:
43 N·m (4.3 kgf·m, 32 lb·ft)
1
Recommended engine oil:
See page 8-1.
Oil quantity:
Oil change:
3.80 L (4.02 US qt, 3.34 Imp.qt)
With oil filter removal:
4.00 L (4.23 US qt, 3.52 Imp.qt)
1. Engine oil filler cap
2. O-ring
2
1
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Periodic maintenance and adjustment
6-14
6 12. Start the engine, and then let it idle
for several minutes while checking
it for oil leakage. If oil is leaking,
immediately turn the engine off
and check for the cause.
TIP
After the engine is started, the engine
oil level warning light should go off if
the oil level is sufficient.
NOTICE
ECA10402
If the oil level warning light flickers
or remains on even if the oil level is
correct, immediately turn the engine
off and have a Yamaha dealer check
the vehicle.
13. Turn the engine off, and then
check the oil level and correct it if
necessary.
EAU85450
Why Yamalube
YAMALUBE oil is a Genuine YAMAHA
Part born of the engineers’ passion
and belief that engine oil is an impor-
tant liquid engine component. We form
teams of specialists in the fields of me-
chanical engineering, chemistry, elec-
tronics and track testing, and have
them develop the engine together with
the oil it will use. Yamalube oils take full
advantage of the base oil’s qualities
and blend in the ideal balance of addi-
tives to make sure the final oil clears
our performance standards. Thus,
Yamalube mineral, semisynthetic and
synthetic oils have their own distinct
characters and value. Yamaha’s expe-
rience gained over many years of re-
search and development into oil since
the 1960’s helps make Yamalube the
best choice for your Yamaha engine.
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Periodic maintenance and adjustment
6-16
6 4. Install the final gear oil drain bolt
and its new gasket, and then tight-
en the bolt to the specified torque.
5. Refill with the recommended final
gear oil to the brim of the filler
hole.
6. Check the oil filler bolt gasket for
damage, and replace it if neces-
sary.
7. Install the oil filler bolt and its gas-
ket, and then tighten the bolt to
the specified torque.
8. Check the final gear case for oil
leakage. If oil is leaking, check for
the cause.
EAUS1203
Coolant
The coolant level should be checked
regularly. In addition, the coolant must
be changed at the intervals specified in
the periodic maintenance chart.
TIP
If genuine Yamaha coolant is not avail-
able, use an ethylene glycol antifreeze
containing corrosion inhibitors for alu-
minum engines and mix with distilled
water at a 1:1 ratio.
EAU54164To check the coolant level
1. Wait for the engine to cool. The
coolant level will vary with engine
temperature.
2. Place the vehicle on the center-
stand.
3. Remove the left cowling vent pan-
el. (See page 3-37.)
4. Look at the coolant reservoir.
1. Final gear oil filler bolt
2. Gasket
3. Final gear oil drain bolt
Tightening torque:
Final gear oil drain bolt:
23 N·m (2.3 kgf·m, 17 lb·ft)
Recommended final gear oil:
Yamaha genuine shaft drive gear oil
SAE 80W-90 API GL-5
Oil quantity:
0.20 L (0.21 US qt, 0.18 Imp.qt)
Tightening torque:
Final gear oil filler bolt:
23 N·m (2.3 kgf·m, 17 lb·ft)
1
2
32
Recommended coolant:
YAMALUBE coolant
Coolant quantity:
Coolant reservoir (max level mark):
0.25 L (0.26 US qt, 0.22 Imp.qt)
Radiator (including all routes):
2.60 L (2.75 US qt, 2.29 Imp.qt)
1. Coolant reservoir
2. Maximum level mark
3. Minimum level mark
2
1
3
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Periodic maintenance and adjustment
6-17
65. If the coolant is at or below the mi-
nimum level mark, remove the
coolant reservoir cap. WARNING!
Remove only the coolant reser-
voir cap. Never attempt to re-
move the radiator cap when the
engine is hot.
[EWA15162]
6. Add coolant or distilled water to
raise the coolant to the maximum
level mark, and install the coolant
reservoir cap. NOTICE: If coolant
is not available, use distilled wa-
ter or soft tap water instead. Do
not use hard water or salt water
since it is harmful to the engine.
If water has been used instead
of coolant, replace it with cool-
ant as soon as possible, other-
wise 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 anti-
freeze content of the coolant as
soon as possible, otherwise the
effectiveness of the coolant will
be reduced.
[ECA10473]
7. Install the panel.
EAU33032Changing the coolant
The coolant must be changed at the in-
tervals specified in the periodic mainte-
nance and lubrication chart. Have a
Yamaha dealer change the coolant.
WARNING! Never attempt to remove
the radiator cap when the engine is
hot.
[EWA10382]
1. Coolant reservoir cap
1
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Page 88 of 122
Periodic maintenance and adjustment
6-19
68. Install the intake air shroud by in-
stalling the screw and the quick
fastener screws.
9. Install the panel.
EAU44735
Checking the engine idling
speed
Check the engine idling speed and, if
necessary, have it corrected by a
Yamaha dealer.
1. Fuel tank overflow hose
1
Engine idling speed:
1000–1100 r/min
UB96E2E0.book Page 19 Wednesday, September 18, 2019 10:21 AM