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PERIODIC MAINTENANCE AND ADJUSTMENT
6-6
6
EAU18722
Removing and installing the
cowling and panels The cowling and panels shown need to
be removed to perform some of the
maintenance jobs described in this
chapter. Refer to this section each time
the cowling or a panel needs to be re-
moved and installed.
EAU19042
Cowling A
To remove the cowling1. Remove the seat and panel A.
(See pages 3-10 and 6-6.)2. Remove the screws, and then pull
the cowling off as shown.
To install the cowling
1. Place the cowling in the original
position, and then install the
screws.
2. Install the panel and the seat.
1. Panel B
1. Cowling A
2. Panel A
1. Screw
2. Quick fastener
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-7
6
EAUW0112
Panels A and B
To remove one of the panels1. Remove the seat. (See page
3-10.)
2. Remove the screws, and then pull
the panel off as shown.To install the panel
1. Place the panel in the original posi-
tion, and then install the screws.
2. Install the seat.
EAU19632
Checking the spark plug The spark plug is an important engine
component, which is easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plug should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plug can re-
veal the condition of the engine.
To remove the spark plug
1. Remove cowling A. (See page
6-6.)
2. Remove the spark plug cap.
1. Screw
2. Quick fastener
1. Spark plug cap
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-8
6 3. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner’s tool kit.
To check the spark plug
1. Check that the porcelain insulator
around the center electrode of the
spark plug is a medium-to-light tan
(the ideal color when the vehicle is
ridden normally).
TIPIf the spark plug shows a distinctly dif-
ferent color, the engine could be oper-
ating improperly. Do not attempt to
diagnose such problems yourself. In-
stead, have a Yamaha dealer checkthe vehicle.2. Check the spark plug for electrode
erosion and excessive carbon or
other deposits, and replace it if
necessary.
To install the spark plug
1. Measure the spark plug gap with a
wire thickness gauge and, if nec-
essary, adjust the gap to specifica-
tion.2. Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
3. Install the spark plug with the
spark plug wrench, and then tight-
en it to the specified torque.
TIPIf 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 speci-fied torque as soon as possible.
4. Install the spark plug cap.
5. Install the cowling.
1. Spark plug wrench
Specified spark plug:
NGK/DR8EA
1. Spark plug gap
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Tightening torque:
Spark plug:
17.5 Nm (1.75 m·kgf, 13 ft·lbf)
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-9
6
EAU37804
Engine oil and oil filter ele-
ment The engine oil level should be checked
before each ride. In addition, the oil
must be changed and the oil filter ele-
ment replaced at the intervals specified
in the General periodic maintenance
and lubrication chart.
To check the engine oil level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion. 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 until the oil set-
tles, and then check the oil level
through the check window located
at the bottom-right side of the
crankcase.TIPThe engine oil should be between theminimum and maximum level marks.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.
To change the engine oil (with or
without oil filter element replace-
ment)
1. Place the vehicle on a level sur-
face.
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 bolt
and drain bolt to drain the oil from
the crankcase.
TIPCheck the washer for damage and re-place it if necessary.
1. Engine oil filler cap
2. Maximum level mark
3. Minimum level mark
1. Dipstick
1. Engine oil drain bolt
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-10
6 5. Remove the oil filter element drain
bolt to drain the oil from the oil filter
element.
TIPSkip steps 6–8 if the oil filter element isnot being replaced.
6. Remove the oil filter element cover
by removing the bolts.7. Remove and replace the oil filter
element and O-rings.
TIPMake sure that the O-rings are properlyseated.
8. Install the oil filter element cover by
installing the bolts, then tightening
them to the specified torque.
9. Install the engine oil drain bolt, and
then tighten it to the specified
torque.10. Install the oil filter element drain
bolt, and then tighten it to the spec-
ified torque.
11. Refill with the specified amount of
the recommended engine oil, and
then install and tighten the oil filler
bolt.
TIPBe sure to wipe off spilled oil on any
parts after the engine and exhaust sys-tem have cooled down.
1. Oil filter element cover bolt
2. Oil filter element drain bolt
1. Oil filter element
2. O-ring
Tightening torque:
Oil filter element cover bolt:
10 Nm (1.0 m·kgf, 7.4 ft·lbf)
Tightening torques:
Engine oil drain bolt:
20 Nm (2.0 m·kgf, 15 ft·lbf)
Oil filter element drain bolt:
7 Nm (0.7 m·kgf, 5.25 ft·lbf)
Recommended oil:
See page 8-1.
Oil quantity:
Without oil filter element replace-
ment:
1.35 L (1.43 US qt, 1.19 Imp.qt)
With oil filter element replacement:
1.45 L (1.53 US qt, 1.28 Imp.qt)
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-11
6
NOTICE
ECA11620
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.
12. Start the engine, and then let it idle
for several minutes while checking
it for oil leakage. If oil is leaking, im-
mediately turn the engine off and
check for the cause.
13. Turn the engine off, and then
check the oil level and correct it if
necessary.
EAU20881
Cleaning the air filter element The air filter should be cleaned at the
specified intervals. It should be cleaned
more frequently when riding in unusual-
ly wet or dusty areas.
1. Remove panel B. (See page 6-6.)
2. Remove the air filter case by re-
moving the screws.
3. Remove the air filter from the case.4. Remove the air filter element from
its guide and clean it with solvent.
After cleaning, remove the remain-
ing solvent by squeezing the ele-
ment.1. Air filter case cover
2. Screw
1. Air filter element
1
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Page 45 of 80
PERIODIC MAINTENANCE AND ADJUSTMENT
6-12
6 5. Apply recommended oil to the en-
tire surface of the element and
squeeze out the excess oil. It
should be wet but not dripping.
6. Insert the air filter element guide
into the air filter and install it in the
case. NOTICE: Make sure that
the air filter element is properly
seated in the air filter case. The
engine should never be operat-
ed without the air filter element
installed, otherwise the pis-
ton(s) and/or cylinder(s) may
become excessively worn.
[ECA10481]
7. Install the air filter case cover and
panel by installing the screws.
EAU34301
Adjusting the engine idling
speed The engine idling speed must be
checked and, if necessary, adjusted as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.
The engine should be warm before
making this adjustment.
Check the engine idling speed and, if
necessary, adjust it to specification by
turning the idle adjusting screw. To in-
crease the engine idling speed, turn the
screw in direction (a). To decrease the
engine idling speed, turn the screw in
direction (b).TIPIf the specified idling speed cannot be
obtained as described above, have aYamaha dealer make the adjustment.
EAU21382
Checking the throttle cable
free play The throttle cable free play should mea-
sure 3.0–5.0 mm (0.12–0.20 in) at the
throttle grip. Periodically check the
throttle cable free play and, if neces-
sary, have a Yamaha dealer adjust it.
Recommended oil:
Engine oil
Engine idling speed:
1300–1500 r/min
1. Throttle cable free play
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Page 46 of 80
PERIODIC MAINTENANCE AND ADJUSTMENT
6-13
6
EAU21401
Valve clearance The valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
EAU21562
Tires To maximize the performance, durabil-
ity, and safe operation of your motor-
cycle, note the following points
regarding the specified tires.
Tire air pressure
The tire air pressure should be checked
and, if necessary, adjusted before each
ride.
WARNING
EWA10501
Operation of this vehicle with im-
proper tire pressure may cause se-
vere injury or death from loss of
control.
The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the temperature
of the tires equals the ambient
temperature).
The tire air pressure must be ad-
justed in accordance with the
riding speed and with the total
weight of rider, passenger, car-
go, and accessories approvedfor this model.
WARNING
EWA10511
Never overload your vehicle. Opera-
tion of an overloaded vehicle couldcause an accident.Tire air pressure (measured on cold
tires):
0–90 kg (0–198 lb):
Front:
225 kPa (2.25 kgf/cm², 33 psi)
Rear:
250 kPa (2.50 kgf/cm², 36 psi)
90–167 kg (198–368 lb):
Front:
225 kPa (2.25 kgf/cm², 33 psi)
Rear:
250 kPa (2.50 kgf/cm², 36 psi)
Maximum load*:
167 kg (368 lb)
* Total weight of rider, passenger, car-
go and accessories
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