2009 YAMAHA MAJESTY 125 check engine

1. V-belt case air filter element
3. Check the air filter element for
damage and replace it if neces-
sary.
4. Install the air filter element with
the colored side facing outward.
5. Install the V-belt case air filter
cover by installing the screws.
NOTICE: Make sure that each
filter element is properly sea-
ted in its case. The engine
should never be operated wit-
hout the filter elements insta-
lled, otherwise the piston(s)
and/or cylinder(s) may become
excessively worn.
[ECA10531]EAU21300
Adjusting the carburetor
The carburetor is an important part of
the engine and requires very sophisti-
cated adjustment. Therefore, all car-
buretor adjustments should be left to
a Yamaha dealer, who has the neces-
sary professional knowledge and
experience.
EAU21370
Adjusting the throttle cable
free play
1. Throttle cable free play
The throttle cable free play should
measure 4.0–6.0 mm (0.16–0.24 in) at
the throttle grip. Periodically check
the throttle cable free play and, if
necessary, adjust it as follows.
TIP
The engine idling speed must be
correctly adjusted before checking
and adjusting the throttle cable free
play.
1. Loosen the locknut.
2. To increase the throttle cable free
play, turn the adjusting nut in
1
1
ZAUM0706
PERIODIC MAINTENANCE AND ADJUSTMENT
6-15
6
5D8-F8199-E1.QXD 10/7/08 07:39 Página 52

direction (a). To decrease the
throttle cable free play, turn the
adjusting nut in direction (b).
1. Locknut
2. Adjusting nut
3. Tighten the locknut.
EAU21401
Valve clearance
The valve clearance changes with
use, resulting in improper air-fuel mix-
ture and/or engine noise. To prevent
this from occurring, the valve clearan-
ce must be adjusted by a Yamaha
dealer at the intervals specified in the
periodic maintenance and lubrication
chart.
EAU21872
Tires
To maximize the performance, durabi-
lity, and safe operation of your vehi-
cle, note the following points regar-
ding the specified tires.
Tire air pressure
The tire air pressure should be chec-
ked and, if necessary, adjusted befo-
re each ride.
EWA10501
s s
WARNING
Operation of this vehicle with
improper tire pressure may cause
severe injury or death from loss of
control.
●The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the temperatu-
ZAUM0053
a
b
21
PERIODIC MAINTENANCE AND ADJUSTMENT
6-16
6
5D8-F8199-E1.QXD 10/7/08 07:39 Página 53

EAU22721
Changing the brake fluid
Have a Yamaha dealer change the
brake fluid at the intervals specified in
the TIP after the periodic maintenan-
ce and lubrication chart. In addition,
have the oil seals of the brake master
cylinder and caliper as well as the
brake hose replaced at the intervals
listed below or whenever they are
damaged or leaking.
●Oil seals: Replace every two
years.
●Brake hose: Replace every four
years.
EAU23101
Checking and lubricating the
cables
The operation of all control cables
and the condition of the cables
should be checked before each ride,
and the cables and cable ends should
be lubricated if necessary. If a cable is
damaged or does not move smoothly,
have a Yamaha dealer check or repla-
ce it. WARNING! Damage to the
outer sheath may interfere with
proper cable operation and will
cause the inner cable to rust.
Replace a damaged cable as soon
as possible to prevent unsafe con-
ditions.
[EWA10721]EAU23172
Lubricating the front and
rear brake levers
Front brake lever
Rear brake lever
The pivoting points of the front and
rear brake levers must be lubricated
Recommended lubricant:
Engine oil
PERIODIC MAINTENANCE AND ADJUSTMENT
6-21
6
5D8-F8199-E1.QXD 10/7/08 07:39 Página 58

PERIODIC MAINTENANCE AND ADJUSTMENT
6-32
6
EAUM2441
Troubleshooting charts
Starting problems or poor engine performance
Check the fuel level in
the fuel tank.
1. FuelThere is enough fuel.
There is no fuel.Check the compression.
Supply fuel.
Operate the electric starter.
2. CompressionThere is compression.
There is no compression.Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.
3. IgnitionWe t
DryWipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the vehicle.The engine does not start.
Check the battery.Operate the electric starter.
Operate the electric starter.
4. BatteryThe engine turns over
quickly.
The engine turns over
slowly.The battery is good.
Check the electrolyte and battery
lead connections, and charge the
battery if necessary.The engine does not start.
Have a Yamaha dealer
check the vehicle.
The engine does not start.
Check the compression.
5D8-F8199-E1.QXD 10/7/08 07:39 Página 69

PERIODIC MAINTENANCE AND ADJUSTMENT
6-33
6Engine overheating
EWA10400
s s
WARNING
●Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be
blown out under pressure, which could cause serious injury. Be sure to wait until the engine has cooled.
●After removing the radiator cap retaining bolt, place a thick rag, like a towel, over the radiator cap, and then
slowly rotate the cap counterclockwise to the detent to allow any residual pressure to escape. When the his-
sing sound has stopped, press down on the cap while turning it counterclockwise, and then remove the cap.
TIP
If coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended
coolant as soon as possible.
Wait until the
engine has cooled.Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.
The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer checkand repair the cooling system.
Add coolant. (See TIP.)
Start the engine. If the engine overheats again, have a
Yamaha dealer check and repair the cooling system.
There is
leakage.
There is
no leakage.
5D8-F8199-E1.QXD 10/7/08 07:39 Página 70

3. Fill up the fuel tank and add fuel
stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating.
4. Perform the following steps to
protect the cylinder, piston rings,
etc. from corrosion.
a. Remove the spark plug cap
and spark plug.
b. Pour a teaspoonful of engine
oil into the spark plug bore.
c. Install the spark plug cap
onto the spark plug, and then
place the spark plug on the
cylinder head so that the
electrodes are grounded.
(This will limit sparking during
the next step.)
d. Turn the engine over several
times with the starter. (This
will coat the cylinder wall with
oil.) WARNING! To prevent
damage or injury from spar-
king, make sure to ground
the spark plug electrodes
while turning the engine
over.
[EWA10951]
e. Remove the spark plug cap
from the spark plug, and theninstall the spark plug and the
spark plug cap.
5. Lubricate all control cables and
the pivoting points of all levers
and pedals as well as of the
sidestand/centerstand.
6. Check and, if necessary, correct
the tire air pressure, and then lift
the scooter so that both of its
wheels are off the ground. Alter-
natively, turn the wheels a little
every month in order to prevent
the tires from becoming degra-
ded in one spot.
7. Cover the muffler outlet with a
plastic bag to prevent moisture
from entering it.
8. Remove the battery and fully
charge it. Store it in a cool, dry
place and charge it once a
month. Do not store the battery in
an excessively cold or warm pla-
ce [less than 0 °C (30 °F) or more
than 30 °C (90 °F)]. For more
information on storing the bat-
tery, see page 6-24.
TIP
Make any necessary repairs before
storing the scooter.
SCOOTER CARE AND STORAGE
7-4
7
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AAcceleration and deceleration ...................5-2
Air filter and V-belt case air filter
elements ................................................6-14
Anti-theft alarm (optional) ..........................3-5
Auxiliary light bulb, replacing ...................6-30
BBattery......................................................6-24
Brake fluid level, checking .......................6-20
Brake fluid, changing ...............................6-21
Brake lever, front ........................................3-7
Brake lever, rear .........................................3-7
Brake levers, lubricating ..........................6-21
Braking .......................................................5-3
CCables, checking and lubricating ............6-21
Carburetor,adjusting.................................6-15
Care............................................................7-1
Catalytic converter ...................................3-10
Centerstand and sidestand, checking
and lubricating .......................................6-22
Clock ..........................................................3-5
Coolant.....................................................6-12
Coolant temperature warning light ............3-2
DDimmer switch ...........................................3-6
EEngine break-in ..........................................5-4
Engine oil ...................................................6-9
FFinal transmission oil ...............................6-11
Front and rear brake lever free play.........6-18
Front and rear brake pads, checking ......6-19
Front fork, checking .................................6-23Fuel ............................................................3-8
Fuel and battery voltage gauge .................3-4
Fuel consumption, tips for reducing ..........5-3
Fuel tank breather/overflow hose ..............3-9
Fuel tank cap .............................................3-7
Fuses, replacing .......................................6-26
HHandlebar switches ...................................3-6
Hazard switch ............................................3-6
Headlight bulb, replacing .........................6-26
High beam indicator light...........................3-2
Horn switch ................................................3-6
IIdentification numbers ...............................9-1
Ignition circuit cut-off system ..................3-14
Indicator and warning lights ......................3-2
KKey identification number ..........................9-1
LLicense plate light bulb, replacing ...........6-30
MMain switch/steering lock ..........................3-1
Matte color, caution ...................................7-1
Model label ................................................9-2
OOil change indicator ...................................3-2
PPanels, removing and installing .................6-7
Parking .......................................................5-4
Part locations .............................................2-1
Periodic maintenance and lubrication
chart .........................................................6-3
Pre-operation check list .............................4-2
SSafe-riding points.......................................1-5
Safety information ......................................1-1
Seat ..........................................................3-10
Shock absorber assemblies, adjusting....3-13
Sidestand .................................................3-13
Spark plug, checking .................................6-8
Specifications.............................................8-1
Speedometer unit ......................................3-3
Start switch ................................................3-6
Starting off .................................................5-2
Starting the engine.....................................5-1
Steering, checking ...................................6-23
Storage.......................................................7-3
Storage compartment ..............................3-11
Storage compartment ..............................3-12
TTail/brake light bulb or rear turn signal light
bulb, replacing .......................................6-29
Throttle cable free play, adjusting ............6-15
Tires .........................................................6-16
Tool kit ........................................................6-1
Troubleshooting .......................................6-31
Troubleshooting charts ............................6-32
Turn signal indicator lights .........................3-2
Turn signal light bulb (front), replacing ....6-28
Turn signal switch ......................................3-6
VValve clearance ........................................6-16
Vehicle identification number .....................9-1
WWheel bearings, checking........................6-24
Wheels .....................................................6-18
INDEX
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