2008 YAMAHA VITY 125 check engine light

TABLE OF CONTENTSSAFETY INFORMATION ..................1-1
Further safe-riding points ................1-4
DESCRIPTION ..................................2-1
Left view ..........................................2-1
Right view ........................................2-2
Controls and instruments.................2-3
INSTRUMENT AND CONTROL
FUNCTIONS.......................................3-1
Main switch/steering lock ................3-1
Keyhole cover .................................3-2
Indicator, indicator lights and
warning light ................................3-2
Speedometer unit ...........................3-3
Self-diagnosis device ......................3-4
Fuel gauge ......................................3-4
Anti-theft alarm (optional) ...............3-4
Handlebar switches ........................3-5
Front brake lever ............................3-5
Rear brake lever .............................3-6
Fuel tank cap ..................................3-6
Fuel .................................................3-7
Catalytic converters ........................3-8
Seat ................................................3-8
Helmet holders ...............................3-9
Storage compartments ...................3-9
Carrier ...........................................3-10
Luggage hook ...............................3-11
Sidestand ......................................3-11
Ignition circuit cut-off system ........3-12PRE-OPERATION CHECKS............. 4-1
Pre-operation check list .................. 4-2
OPERATION AND IMPORTANT
RIDING POINTS................................. 5-1
Starting the engine ......................... 5-1
Starting off ...................................... 5-2
Acceleration and deceleration ........ 5-3
Braking ........................................... 5-3
Tips for reducing fuel
consumption ............................... 5-4
Engine break-in .............................. 5-4
Parking ........................................... 5-5
PERIODIC MAINTENANCE AND
MINOR REPAIR................................. 6-1
Periodic maintenance and
lubrication chart .......................... 6-2
Removing and installing cowlings
and panels .................................. 6-6
Checking the spark plug ................. 6-8
Engine oil ....................................... 6-9
Final transmission oil .................... 6-11
Air filter and V-belt case air filter
elements ................................... 6-12
Checking the throttle cable free
play ........................................... 6-15
Valve clearance ............................ 6-15
Tires ............................................. 6-15
Cast wheels .................................. 6-17Checking the front brake lever
free play .................................... 6-17
Adjusting the rear brake lever
free play .................................... 6-18
Checking the front brake pads
and rear brake shoes ............... 6-18
Checking the front brake fluid
level .......................................... 6-19
Changing the brake fluid .............. 6-20
Checking and lubricating the
cables ....................................... 6-20
Checking and lubricating the
throttle grip and cable ............... 6-21
Lubricating the front and rear
brake levers .............................. 6-21
Checking and lubricating the
centerstand and sidestand ....... 6-22
Checking the front fork ................. 6-22
Checking the steering .................. 6-23
Checking the wheel bearings ....... 6-23
Battery ......................................... 6-23
Replacing the fuse ....................... 6-25
Replacing the headlight bulb ....... 6-25
Replacing a front turn signal
light bulb ................................... 6-26
Rear turn signal light and
tail/brake light ........................... 6-27
Replacing the auxiliary light
bulb ........................................... 6-27
Troubleshooting ........................... 6-28
Troubleshooting chart .................. 6-29U4P7E1E0.book Page 1 Wednesday, December 12, 2007 9:37 AM

SAFETY INFORMATION
1-3
1When loading within this weight limit,
keep the following in mind:


Cargo and accessory weight
should be kept as low and close to
the scooter as possible. Make sure
to distribute the weight as evenly
as possible on both sides of the
scooter to minimize imbalance or
instability.


Shifting weights can create a sud-
den imbalance. Make sure that ac-
cessories and cargo are securely
attached to the scooter before
riding. Check accessory mounts
and cargo restraints frequently.


Never attach any large or heavy
items to the handlebar, front fork,
or front fender. Such items can
create unstable handling or a slow
steering response.
Accessories
Genuine Yamaha accessories have
been specifically designed for use on
this scooter. Since Yamaha cannot test
all other accessories that may be avail-
able, you must personally be responsi-
ble for the proper selection, installationand use of non-Yamaha accessories.
Use extreme caution when selecting
and installing any accessories.
Keep the following guidelines in mind,
as well as those provided under “Load-
ing” when mounting accessories.


Never install accessories or carry
cargo that would impair the perfor-
mance of your scooter. Carefully
inspect the accessory before using
it to make sure that it does not in
any way reduce ground clearance
or cornering clearance, limit sus-
pension travel, steering travel or
control operation, or obscure lights
or reflectors.
Accessories fitted to the handle-
bar or the front fork area can
create instability due to improper
weight distribution or aerody-
namic changes. If accessories
are added to the handlebar or
front fork area, they must be as
lightweight as possible and
should be kept to a minimum.
Bulky or large accessories may
seriously affect the stability of
the scooter due to aerodynamic
effects. Wind may attempt to liftthe scooter, or the scooter may
become unstable in cross
winds. These accessories may
also cause instability when
passing or being passed by
large vehicles.
Certain accessories can dis-
place the operator from his or
her normal riding position. This
improper position limits the free-
dom of movement of the opera-
tor and may limit control ability,
therefore, such accessories are
not recommended.


Use caution when adding electri-
cal accessories. If electrical acces-
sories exceed the capacity of the
scooter’s electrical system an
electric failure could result, which
could cause a dangerous loss of
lights or engine power.
Gasoline and exhaust gas


GASOLINE IS HIGHLY FLAMMA-
BLE:
Always turn the engine off when
refueling.
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INSTRUMENT AND CONTROL FUNCTIONS
3-3
3
EAU45400
Oil change indicator
This indicator changes from green to
red every 2000 km (1200 mi) to indicate
that the engine oil should be changed.
After changing the engine oil, push the
oil change indicator reset switch in with
the main switch key.
If the engine oil is changed before the
2000 km (1200 mi) interval, the indica-
tor must be reset after the oil change for
the next periodic oil change to be indi-
cated at the correct time.
NOTE:After resetting the oil change indicator
reset switch, the indicator changesfrom red to green.CAUTION:
ECA10280
After 1000 km (600 mi) of operation,the engine oil must be changed.
EAUT1931
Engine trouble warning light“”
This warning light flashes or stays on
when an electrical circuit monitoring the
engine is defective. When this occurs,
have a Yamaha dealer check the self-
diagnosis system.
The electrical circuit of the warning light
can be checked by turning the key to
“ON”. If the warning light does not come
on for a few seconds, then go off, have
a Yamaha dealer check the electrical
circuit.
EAUT1821
Speedometer unit The speedometer unit is equipped with
a speedometer and an odometer. The
speedometer shows the riding speed.
The odometer shows the total distance
traveled.
1. Oil change indicator
2. Oil change indicator reset switch1
2
1. Speedometer
2. Odometer
OIL
CHANGE2 1
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INSTRUMENT AND CONTROL FUNCTIONS
3-4
3
EAU12090
Self-diagnosis device This model is equipped with a self-diag-
nosis device for various electrical cir-
cuits.
If any of those circuits are defective, the
engine trouble warning light will come
on or flash. If this occurs, have a
Yamaha dealer check the vehicle.CAUTION:
ECA11170
To prevent engine damage, be sure
to consult a Yamaha dealer as soonas possible if this occurs.
EAU45630
Fuel gauge The fuel gauge indicates the amount of
fuel in the fuel tank. The needle moves
towards “E” (Empty) as the fuel level
decreases. When the needle reaches
the red line, refuel as soon as possible.NOTE:Turning the key to “OFF” cancels thefuel gauge reading.
EAU12331
Anti-theft alarm (optional) This model can be equipped with an
optional anti-theft alarm by a Yamaha
dealer. Contact a Yamaha dealer for
more information.
1. Fuel gauge
2. Red line
OIL
CHANGE
1
2
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OPERATION AND IMPORTANT RIDING POINTS
5-1
5
EAU15980
WARNING
EWA10870


Become thoroughly familiar
with all operating controls and
their functions before riding.
Consult a Yamaha dealer re-
garding any control or function
that you do not thoroughly un-
derstand.


Never start the engine or oper-
ate it in a closed area for any
length of time. Exhaust fumes
are poisonous, and inhaling
them can cause loss of con-
sciousness and death within a
short time. Always make sure
that there is adequate ventila-
tion.


For safety, always start the en-gine with the centerstand down.
EAU45310
NOTE:This model is equipped with a lean an-
gle sensor to stop the engine in case of
a turnover. To start the engine after a
turnover, be sure to turn the main
switch to “OFF” and then to “ON”. Fail-
ing to do so will prevent the engine from
starting even though the engine willcrank when pushing the start switch.
EAU45420
Starting the engine CAUTION:
ECA10250
See page 5-4 for engine break-in in-
structions prior to operating the ve-hicle for the first time.
In order for the ignition circuit cut-off
system to enable starting, the side-
stand must be up.
WARNING
EWA10290


Before starting the engine,
check the function of the igni-
tion circuit cut-off system ac-
cording to the procedure
described on page 3-12.


Never ride with the sidestanddown.
1. Turn the key to “ON”.
CAUTION:
ECAT1040
The engine trouble warning light
should come on for a few seconds,
then go off. If the warning light does
not go off, have a Yamaha dealercheck the electrical circuit.
2. Close the throttle completely.
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OPERATION AND IMPORTANT RIDING POINTS
5-4
5
EAU16820
Tips for reducing fuel con-
sumption Fuel consumption depends largely on
your riding style. Consider the following
tips to reduce fuel consumption:

Avoid high engine speeds during
acceleration.


Avoid high engine speeds with no
load on the engine.


Turn the engine off instead of let-
ting it idle for an extended length of
time (e.g., in traffic jams, at traffic
lights or at railroad crossings).
EAU16830
Engine break-in There is never a more important period
in the life of your engine than the period
between 0 and 1000 km (600 mi). For
this reason, you should read the follow-
ing material carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1000 km (600 mi). The various parts in
the engine wear and polish themselves
to the correct operating clearances.
During this period, prolonged full-throt-
tle operation or any condition that might
result in engine overheating must be
avoided.
EAU45580
0–150 km (0–90 mi)
Avoid prolonged operation above 1/3
throttle.
150–500 km (90–300 mi)
Avoid prolonged operation above 1/2
throttle.
500–1000 km (300–600 mi)
Avoid prolonged operation above 3/4
throttle.
CAUTION:
ECA16500
After 1000 km (600 mi) of operation,
be sure to change the engine oil and
final transmission oil, and to cleanthe oil strainer.
1000 km (600 mi) and beyond
The vehicle can now be operated nor-
mally.CAUTION:
ECA10270
If any engine trouble should occur
during the engine break-in period,
immediately have a Yamaha dealercheck the vehicle.
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-4
6
19*Shock absorber as-
semblyCheck operation and shock ab-
sorber for oil leakage.√√√√
20*Fuel injectionCheck engine idle speed.√√√√√√
21 Engine oilChange. (See page 6-9.)
Check oil level and vehicle for oil
leakage.√Every 2000 km (1200 mi)
22*Engine oil strainerClean.√
23Final transmission
oilCheck vehicle for oil leakage.√√√√√
Change.√√√
24*V- b e l tReplace. Every 12000 km (7000 mi)
25*Front and rear brake
switchesCheck operation.√√√√√√
26Moving parts and
cablesLubricate.√√√√√
27*Throttle grip hous-
ing and cableCheck operation and free play.
Adjust the throttle cable free play
if necessary.
Lubricate the throttle grip housing
and cable.√√√√√
28*Air induction sys-
temCheck the air cut-off valve, reed
valve, and hose for damage.
Replace any damaged parts if
necessary.√√√√√
29*Lights, signals and
switchesCheck operation.
Adjust headlight beam.√√√√√√ NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING
ANNUAL
CHECK 1000 km
(600 mi)6000 km
(3500 mi)12000 km
(7000 mi)18000 km
(10500 mi)24000 km
(14000 mi)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
6
EAU45590
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. Place the vehicle on the center-
stand.
2. Remove panel A. (See page 6-6.)
3. Remove the spark plug cap.
4. Remove the spark plug as shown,
using the spark plug wrench,
which is located in the rear storage
compartment. (See page 3-9.)
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).
NOTE:If 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.
1. Spark plug wrench
1. Spark plug wrench
1
1
Specified spark plug:
NGK/CR7E
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