2002 YAMAHA NEO115 light

PERIODIC MAINTENANCE AND MINOR REPAIR
6-7
6
EAUT0004*
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 panel A. (See page 6-4
for panel removal and installation
procedures.)
2. Remove the spark plug cap.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 motor-
cycle is ridden normally).
NOTE:_ If the spark plug shows a distinctly dif-
ferent color, the engine could be defec-
tive. Do not attempt to diagnose such
problems yourself. Instead, have a
Yamaha dealer check the motorcycle. _2. Check the spark plug for electrode
erosion and excessive carbon or
other deposits, and replace it if
necessary.
1. Spark plug cap
1. Spark plug wrench
Specified spark plug:
CR7HSA (NGK)
U5MXE0.book Page 7 Thursday, December 20, 2001 2:08 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
6
EAUT0016*
Engine oil and oil strainer The engine oil level should be checked
before each ride. In addition, the oil
must be changed and the oil strainer
cleaned at the intervals specified in the
periodic maintenance and lubrication
chart.
To check the engine oil level
1. Place the motorcycle on the cen-
terstand.NOTE:_ Make sure that the motorcycle is posi-
tioned straight up when checking the oil
level. 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, remove the oil filler cap, wipe
the dipstick clean, insert it back
into the oil filler hole (without
screwing it in), and then remove it
again to check the oil level.
NOTE:_ The engine oil should be between the
minimum 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.
1. Engine oil filler cap
1. Dipstick
2. Maximum level mark
3. Minimum level mark
U5MXE0.book Page 9 Thursday, December 20, 2001 2:08 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-14
6 5. Lightly tap the air filter element to
remove most of the dust and dirt,
and then blow the remaining dirt
out with compressed air.
6. Check the air filter element for
damage and replace it if neces-
sary.
7. Insert the air filter element into the
air filter case.
8. Install the air filter case cover by
installing the screws.
9. Install the panel.Cleaning the V-belt case air filter
elements
1. Remove V-belt case air filter cover
A by removing the bolts.2. Remove V-belt case air filter cover
B by removing the bolts.
1. V-belt case air filter cover A
2. Bolt (× 2)
1. V-belt case air filter cover B
2. Bolt (× 3)
U5MXE0.book Page 14 Thursday, December 20, 2001 2:08 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-33
6
EAU04134*
Replacing a headlight bulb If a headlight bulb burns out, replace it
as follows.
EC000107
CAUTION:_ It is advisable to have a Yamaha
dealer perform this job. _1. Place the motorcycle on the cen-
terstand.
2. Remove cowling A. (See page 6-5
for cowling removal and installa-
tion procedures.)3. Remove the headlight bulb cover
by turning it counterclockwise.4. Remove the socket by pushing it
in and turning it counterclockwise.
5. Remove the defective bulb.
EW000119
WARNING
_ 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 cooled
down. _6. Place a new headlight bulb into
position.
7. Install the socket by pushing it in
and turning it clockwise.
1. Headlight bulb cover (× 2)
1. Headlight bulb socket (× 2)
U5MXE0.book Page 33 Thursday, December 20, 2001 2:08 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-34
6 8. Install the headlight bulb cover by
turning it clockwise.
9. Install the cowling.
10. Have a Yamaha dealer adjust the
headlight beam if necessary.
EAUT0022*
Replacing a front turn signal
light bulb
EC000107
CAUTION:_ It is advisable to have a Yamaha
dealer perform this job. _1. Place the motorcycle on the cen-
terstand.
2. Remove cowling A. (See page 6-5
for cowling removal and installa-
tion procedures.)3. Remove the socket (together with
the bulb) by turning it counter-
clockwise.
4. Remove the defective bulb.
5. Insert a new bulb into position.
6. Install the socket (together with
the bulb) by turning it clockwise.
7. Install the cowling.
1. Turn signal light bulb socket (× 2)
U5MXE0.book Page 34 Thursday, December 20, 2001 2:08 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-35
6
EAUS0013*
Replacing the tail/brake light
bulb or a rear turn signal light
bulb
EC000107
CAUTION:_ It is advisable to have a Yamaha
dealer perform this job. _Place the motorcycle on the center-
stand.
Tail/brake light bulb
1. Remove panel B. (See page 6-5
for panel removal and installation
procedures.)2. Remove the screws, unhook the
tab from the slot, and then pull the
tail/brake light lens outward.3. Remove the defective bulb by
pushing it in and turning it counter-
clockwise.
4. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.
5. Place the tail/brake light lens into
the original position, and then in-
stall the screws.
EC000108
CAUTION:_ Do not overtighten the screws, oth-
erwise the lens may break. _6. Install the panel.
1. Screw (× 2)
1. Tab
2. Slot
1. Tail/brake light bulb
U5MXE0.book Page 35 Thursday, December 20, 2001 2:08 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-36
6 Turn signal light bulb
1. Remove the tail/brake light lens.
(See “Tail/brake light bulb” for lens
removal and installation proce-
dures.)
2. Pull the turn signal light lens off. 3. Remove the defective bulb.
4. Insert a new bulb into position.
5. Place the turn signal light lens into
the original position.
6. Install the tail/brake light lens.
1. Turn signal light bulb (× 2)
U5MXE0.book Page 36 Thursday, December 20, 2001 2:08 PM

7-1
7
EAK00000
7-MOTORCYCLE CLEANING AND STORAGE
EAK01302*
A. CLEANINGFrequent, thorough cleaning of your
motorcycle will not only enhance its ap-
pearance but will improve its general
performance and extend the useful life
of many components.
1. Rinse the dirt and degreaser off
with a garden hose.
EUU34602
CAUTION:_Excessive hose pressure may cause
water seepage and deterioration of
wheel bearings, front fork, brakes,
transmission seals and electrical
parts.2. After cleaning the motorcycle, dry
all surfaces with a chamois, clean
towel, or soft absorbent cloth.
3. Automotive-type wax may be ap-
plied to all painted and chrome-
plated surfaces. When finished,
start the engine and let it idle for
several minutes.
EAK00700*
B. STORAGELong term storage (60 days or more) of
your motorcycle will require some pre-
ventive procedures to guard against
deterioration. After thoroughly cleaning
the motorcycle, prepare for storage as
follows:
1. Drain the fuel tank, fuel lines, and
carburetor float bowl(s).
2. Lubricate all control cables.
3. Block up the frame to raise both
wheels off the ground.
4. Tie a plastic bag over the exhaust
pipe outlet to prevent moisture
from entering.
5. If storing in a humid or salt-air at-
mosphere, coat all exposed metal
surfaces with a light film of oil. Do
not apply oil to any rubber parts or
the seat cover.6. Remove the battery and charge it.
Store it in a dry place and re-
charge it once a month. Do not
store the battery in an excessively
warm or cold place (less than 0°C
or more than 30°C).
EUU05800
NOTE:_Make any necessary repairs before
storing the motorcycle.
U5MXE0.book Page 1 Thursday, December 20, 2001 2:08 PM