Page 57 of 106
PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
6 To install the cowling
1. Place the cowling in the original
position, and then install the bolts,
quick fasteners, and quick fastener
screw.
2. Connect the turn signal light lead
coupler.
3. Install cowling A (to complete the
installation of cowling C) or cowl-
ing B (to complete the installation
of cowling D).
EAU39091
Cowling E
To remove the cowling1. Remove cowling B and panel B.
(See page 6-6.)2. Unfasten the wire harness by
pressing on the tab to open the
plastic fastener.
3. Remove the bolts and the quick
fastener, and then pull the cowling
off as shown.
1. Cowling D
2. Bolt
3. Turn signal light lead coupler
4. Quick fastener
1. Quick fastener
1. Quick fastener screw
1. Plastic fastener
2. Tab
3. Wire harness
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-10
6
EAU19651
Checking the spark plugs The spark plugs are important engine
components, which should be checked
periodically, preferably by a Yamaha
dealer. Since heat and deposits will
cause any spark plug to slowly erode,
they should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plugs can re-
veal the condition of the engine.
The porcelain insulator around the cen-
ter 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 en-
gine should have the same color. If any
spark plug shows a distinctly different
color, the engine could be defective. Do
not attempt to diagnose such problems
yourself. Instead, have a Yamaha deal-
er check the vehicle.
If a spark plug shows signs of electrode
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.
NOTE: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 speci-fied torque as soon as possible.CAUTION:
ECA10840
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, twistit back and forth while pushing it in.
Specified spark plug:
NGK/CR10EK
1. Spark plug gap
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Tightening torque:
Spark plug:
12.5 Nm (1.25 m·kgf, 9.0 ft·lbf)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-11
6
EAU38992
Engine oil and oil filter
cartridge 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 a level sur-
face and hold it in an upright posi-
tion.NOTE:
Make sure that the vehicle is positioned
straight up when checking the oil level.
A slight tilt to the side can result in afalse 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.4. Remove the engine oil dipstick and
wipe it clean, insert it back into the
hole (without screwing it in), and
then remove it again to check the
oil level.
NOTE:The engine oil should be between theminimum and maximum level marks.
5. If the engine oil is at or below the
minimum level mark, remove the
oil filler cap, and then add sufficient
oil of the recommended type to
raise it to the correct level.6. Insert and tighten the engine oil
dipstick, and then install and tight-
en the oil filler cap.
To change the engine oil (with or
without oil filter cartridge replace-
ment)
1. Remove cowling C. (See page
6-6.)
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
and drain bolt to drain the oil from
the crankcase.1. Dipstick
2. Maximum level mark
3. Minimum level mark
1. Engine oil filler cap
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-14
6
Make sure that no foreign mate-rial enters the crankcase.
14. 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.
NOTE:After the engine is started, the engine
oil level warning light should go off if theoil level is sufficient.CAUTION:
ECA10400
If the oil level warning light flickers
or remains on, immediately turn the
engine off and have a Yamaha dealercheck the vehicle.
15. Turn the engine off, and then
check the oil level and correct it if
necessary.
16. Install the cowling.
EAU20070
Coolant The coolant level should be checked
before each ride. In addition, the cool-
ant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAU39082
To check the coolant level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.NOTE:
The coolant level must be checked
on a cold engine since the level
varies with engine temperature.
Make sure that the vehicle is posi-
tioned straight up when checking
the coolant level. A slight tilt to theside can result in a false reading.
2. Check the coolant level in the cool-
ant reservoir.
NOTE:The coolant should be between theminimum and maximum level marks.3. If the coolant is at or below the
minimum level mark, remove pan-
el B (See page 6-6.).
4. Remove the reservoir cap, add
coolant to the maximum level
mark, and then install the reservoir
cap.
1. Coolant reservoir
2. Maximum level mark
3. Minimum level mark
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-22
6
NOTE:If the specified clutch lever free play
cannot be obtained as describedabove, proceed as follows.
1. Fully turn the adjusting bolt at the
clutch lever in direction (a) to loos-
en the clutch cable.
2. Loosen the locknut at the crank-
case.
3. To increase the clutch lever free
play, turn the adjusting nut in direc-
tion (a). To decrease the clutch le-
ver free play, turn the adjusting nut
in direction (b).
4. Tighten the locknut.
EAU22270
Adjusting the rear brake light
switch The rear brake light switch, which is ac-
tivated by the brake pedal, is properly
adjusted when the brake light comes
on just before braking takes effect. If
necessary, adjust the brake light switch
as follows.
Turn the adjusting nut while holding the
rear brake light switch in place. To
make the brake light come on earlier,
turn the adjusting nut in direction (a). To
make the brake light come on later, turn
the adjusting nut in direction (b).
EAU22390
Checking the front and rear
brake pads The front and rear brake pads must be
checked for wear at the intervals spec-
ified in the periodic maintenance and
lubrication chart.
EAU36890
Front brake pads
Each front brake pad is provided with
wear indicators, which allows you to
check the brake pad wear without hav-
ing to disassemble the brake. To check
the brake pad wear, check the position
of the wear indicators while applying
the brake. If a brake pad has worn to
1. Locknut
2. Clutch lever free play adjusting nut (crank-
case)
1. Rear brake light switch
2. Rear brake light switch adjusting nut
1. Brake pad wear indicator
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Page 81 of 106
PERIODIC MAINTENANCE AND MINOR REPAIR
6-32
6 sealed-type (MF) battery charg-
er, have a Yamaha dealer
charge your battery.
EAU23703
Replacing the fuses The main fuse and fuse box 1 are locat-
ed under the rider seat. (See page
3-19.)
Fuse box 2 is located under panel A.
(See page 6-6.)If a fuse is blown, replace it as follows.
1. Turn the key to “OFF” and turn off
the electrical circuit in question.
2. Remove the blown fuse, and then
install a new fuse of the specified
amperage.1. Main fuse
2. Fuel injection system spare fuse
3. Fuel injection system fuse
4. Fuse box 1
5. Backup fuse (for odometer, clock and immo-
bilizer system)
6. ETV (electric throttle valve) fuse
7. Spare fuse
1. Fuse box 2
2. Right radiator fan fuse
3. Left radiator fan fuse
4. Signaling system fuse
5. Ignition fuse
6. Taillight fuse
7. Headlight fuse
8. Spare fuse
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-33
6
CAUTION:
ECA10640
Do not use a fuse of a higher amper-
age rating than recommended to
avoid causing extensive damage to
the electrical system and possibly afire.
3. Turn the key to “ON” and turn on
the electrical circuit in question to
check if the device operates.4. If the fuse immediately blows
again, have a Yamaha dealer
check the electrical system.
EAU39010
Replacing a headlight bulb This model is equipped with quartz bulb
headlights. If a headlight bulb burns
out, replace it as follows.
1. Remove the headlight bulb cover
by turning it counterclockwise.
2. Disconnect the headlight coupler.
Specified fuses:
Main fuse:
50.0 A
Fuel injection system fuse:
15.0 A
Electric throttle valve fuse:
7.5 A
Backup fuse:
7.5 A
Radiator fan fuse:
15.0 A × 2
Ignition fuse:
15.0 A
Signaling system fuse:
10.0 A
Taillight fuse:
7.5 A
Headlight fuse:
15.0 A
1. Headlight bulb cover
1. Headlight coupler
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-34
6 3. Unhook the headlight bulb holder,
and then remove the defective
bulb.
WARNING
EWA10790
Headlight bulbs get very hot. There-
fore, keep flammable products away
from a lit headlight bulb, and do not
touch the bulb until it has cooleddown.
4. Place a new headlight bulb into po-
sition, and then secure it with the
bulb holder.CAUTION:
ECA10650
Take care not to damage the follow-
ing parts:
Headlight bulb
Do not touch the glass part of
the headlight bulb to keep it free
from oil, otherwise the transpar-
ency of the glass, the luminosity
of the bulb, and the bulb life will
be adversely affected. Thor-
oughly clean off any dirt and fin-
gerprints on the headlight bulb
using a cloth moistened with al-
cohol or thinner.
Headlight lens
Do not affix any type of tinted
film or stickers to the headlight
lens.
Do not use a headlight bulb of awattage higher than specified.5. Connect the headlight coupler.
6. Install the headlight bulb cover by
turning it clockwise.
7. Have a Yamaha dealer adjust the
headlight beam if necessary.
1. Headlight bulb holder
1. Do not touch the glass part of the bulb.
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