Page 41 of 74
PERIODIC MAINTENANCE AND ADJUSTMENT
6-7
6 To install the cowling
1. Connect the headlight coupler,
and the auxiliary light lead coupler.
2. Place the cowling in the original
position, and then install the
screws.
EAU19281
Panel A
To remove the panelRemove the screw, and then pull the
panel off as shown.To install the panel
Place the panel in the original position,
and then install the screw.
EAU45450
Panel B
To remove the panel1. Pull up the floorboard mat.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. Place the floorboard mat in the
original position.
1. Headlight coupler
2. Auxiliary light lead coupler
1
2
1. Screw
1
1. Floorboard mat
1. Screw
1
1
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PERIODIC MAINTENANCE AND ADJUSTMENT
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 3-10.)
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 check
the 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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PERIODIC MAINTENANCE AND ADJUSTMENT
6-9
6 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 panel.
EAU45482
Engine oil The engine oil level should be checked
before each ride. In addition, the oil
must be changed at the intervals spec-
ified in the periodic maintenance and
lubrication chart.
The engine oil must also be changed at
the initial 1000 km (600 mi) and when
the oil change indicator color changes
from green to red. The oil change indi-
cator must be reset after the initial 1000
km (600 mi). (See page 3-2 for reset
procedures.)
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 until the oil set-
tles, remove the oil filler cap, wipe
the engine oil dipstick clean, insert
it back into the oil filler hole (with-
out screwing it in), and then re-
move it again to check the oil level.
1. Spark plug gapSpark plug gap:
0.7–0.8 mm (0.028–0.031 in)
Tightening torque:
Spark plug:
13 Nm (1.3 m·kgf, 9.4 ft·lbf)
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-10
6
TIPThe engine oil should be between the
tip of the dipstick and maximum level
mark.4. If the engine oil is not between the
tip of the dipstick and the maxi-
mum level mark, add sufficient oil
of the recommended type to raise
it to the correct level.
5. Insert the engine oil dipstick into
the oil filler hole, and then tighten
the oil filler cap.To change the engine oil
1. Place the vehicle on the center-
stand.
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 then remove the engine oil
drain bolt and its gasket to drain
the oil from the crankcase.
5. Install the engine oil drain bolt and
its new gasket, and then tighten
the bolt to the specified torque.6. Refill with the specified amount of
the recommended engine oil, and
then install and tighten the engine
oil filler cap.
NOTICE
ECA11670
Do not use oils with a diesel
specification of “CD” or oils of a
higher quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.
Be sure no foreign material en-
ters the crankcase.
7. 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.
1. Engine oil filler cap
2. Engine oil dipstick
3. Maximum level mark
4. Tip of the engine oil dipstick
32
1 4
1. Engine oil drain bolt
2. Gasket
1 1
2
Tightening torque:
Engine oil drain bolt
20 Nm (2.0 m·kgf, 14 ft·lbf)
Recommended engine oil:
See page 8-1.
Oil quantity:
1.00 L (1.06 US qt, 0.88 Imp.qt)
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-11
6 8. Turn the engine off, and then
check the oil level and correct it if
necessary.
9. Reset the oil change indicator.
(See page 3-2 for reset proce-
dures.)
TIPIf the engine oil is changed before the
oil change indicator color changes from
green to red (i.e. before the periodic oil
change interval has been reached), the
oil change indicator must be reset after
the oil change for the next periodic oil
change to be indicated at the correct
time.
EAU20065
Final transmission oil The final transmission case must be
checked for oil leakage before each
ride. If any leakage is found, have a
Yamaha dealer check and repair the
scooter. In addition, the final transmis-
sion oil must be changed as follows at
the intervals specified in the periodic
maintenance and lubrication chart.
1. Start the engine, warm up the final
transmission oil by riding the
scooter for several minutes, and
then stop the engine.
2. Place the scooter on the center-
stand.
3. Place an oil pan under the final
transmission case to collect the
used oil.
4. Remove the final transmission oil
filler cap and its O-ring from the fi-
nal transmission case.
5. Remove the final transmission oil
drain bolt and its gasket to drain
the oil from the final transmission
case.6. Install the final transmission oil
drain bolt and its new gasket, and
then tighten the bolt to the speci-
fied torque.
1. Final transmission oil filler cap
2. O-ring
1. Final transmission oil drain bolt
2. Gasket
1
1
2
11
2
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-12
67. Refill with the specified amount of
the recommended final transmis-
sion oil. WARNING! Make sure
that no foreign material enters
the final transmission case.
Make sure that no oil gets on the
tire or wheel.
[EWA11311]
8. Install the final transmission oil fill-
er cap and its new O-ring, and then
tighten the oil filler cap.
9. Check the final transmission case
for oil leakage. If oil is leaking,
check for the cause.
EAU45492
Air filter and V-belt case air fil-
ter elements The air filter element should be re-
placed and the V-belt case air filter ele-
ment should be cleaned at the intervals
specified in the periodic maintenance
and lubrication chart. Service the air fil-
ter elements more frequently if you are
riding in unusually wet or dusty areas.
The air filter check hoses must be fre-
quently checked and cleaned if neces-
sary.
Replacing the air filter element
1. Place the scooter on the center-
stand.
2. Remove the air filter case cover by
removing the screws.3. Pull the air filter element out.
4. Insert a new air filter element into
the air filter case. NOTICE: Make
sure that the air filter element is
properly seated in the air filter
case. The engine should never
Tightening torque:
Final transmission oil drain bolt:
23 Nm (2.3 m·kgf, 17 ft·lbf)
Recommended final transmission
oil:
See page 8-1.
Oil quantity:
0.13 L (0.14 US qt, 0.11 Imp.qt)
1. Air filter case cover
2. Screw
1. Air filter element
2 1
2
1
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Page 47 of 74
![YAMAHA VITY 125 2010 Owners Manual PERIODIC MAINTENANCE AND ADJUSTMENT
6-13
6 be operated without the air filter
element installed, otherwise the
piston(s) and/or cylinder(s) may
become excessively worn.
[ECA10481]
5. Install the air f YAMAHA VITY 125 2010 Owners Manual PERIODIC MAINTENANCE AND ADJUSTMENT
6-13
6 be operated without the air filter
element installed, otherwise the
piston(s) and/or cylinder(s) may
become excessively worn.
[ECA10481]
5. Install the air f](/manual-img/51/51975/w960_51975-46.png)
PERIODIC MAINTENANCE AND ADJUSTMENT
6-13
6 be operated without the air filter
element installed, otherwise the
piston(s) and/or cylinder(s) may
become excessively worn.
[ECA10481]
5. Install the air filter case cover by in-
stalling the screws.
Cleaning the air filter check hoses
1. Check the hoses on the rear side
of the air filter case for accumulat-
ed dirt or water.
2. If dirt or water is visible in the air fil-
ter check hoses, remove the
clamps from them, and then re-
move the plugs to drain the hoses.Cleaning the V-belt case air filter el-
ement
1. Place the scooter on the center-
stand.
2. Remove the screws, and then pull
the V-belt case air filter element
cover outward and away from V-
belt case.
3. Remove the V-belt case air filter
element holder by removing the
screw.4. Pull the V-belt case air filter ele-
ment out, and then clean it with
solvent. After cleaning, remove the
remaining solvent by squeezing
the element. WARNING! Use
only a dedicated parts cleaning
solvent. To avoid the risk of fire
or explosion, do not use gaso-
line or solvents with a low flash
point.
[EWA10431]
NOTICE: To avoid
damaging the air filter element,
handle it gently and carefully,
and do not twist it.
[ECA10521]
1. Air filter check hose
2. Clamp
3. Air filter check hose plug
1
23
1. V-belt case air filter element cover
2. Screw
2 1
1. V-belt case air filter element holder
2. Screw
1
2
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Page 48 of 74
PERIODIC MAINTENANCE AND ADJUSTMENT
6-14
6
5. Apply oil of the recommended type
to the entire surface of the sponge
material, and then squeeze the ex-
cess oil out.
TIPThe air filter element should be wet but
not dripping.
6. Insert the element into the V-belt
case.
7. Install the air filter element holder
by installing the screw.
8. Install the air filter element cover
by installing the screws.
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.
1. V-belt case air filter element
1
Recommended oil:
Yamaha foam air filter oil or other
quality foam air filter oil
1. Throttle cable free play1ZAUM0051
U4P7E2E0.book Page 14 Thursday, August 20, 2009 9:44 AM