check engine YAMAHA MAJESTY 400 2008 Owner's Manual

PERIODIC MAINTENANCE AND MINOR REPAIR
6-20
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9Left
Right
4. Insert a new air filter element into
the air filter case.
5. Install the air filter case cover by in-
stalling the screws.6. Install the rubber cap.
CAUTION:

ECA12922

Make sure that each filter ele-
ment is properly seated in its
case.

Always replace both air filter el-
ements at the same time, other-
wise poor engine performance
or damage to the engine may re-
sult.

The engine should never be op-
erated without the filter ele-
ments installed, otherwise the
piston(s) and/or cylinder(s) may
become excessively worn.
To clean the air filter check hoses
1. Check the hose at the bottom of
both air filter cases for accumulat-
ed dirt or water.
Left
Right
2. If dirt or water is visible, remove
the hose, clean it, and then install
it.

1. Air filter element
1. Air filter element
1
1

1. Air filter check hose
1. Air filter check hose
1
1

PERIODIC MAINTENANCE AND MINOR REPAIR
6-22
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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.
EAU21401
Valve clearance
The valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
EAU21871
Tires
To maximize the performance, durabil-
ity, and safe operation of your vehicle,
note the following points regarding the
specified tires.
Tire air pressure
The tire air pressure should be checked
and, if necessary, adjusted before each
ride.
WARNING

EWA10500

The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the temperature
of the tires equals the ambient
temperature).

The tire air pressure must be ad-
justed in accordance with the
riding speed and with the total
weight of rider, passenger, car-
go, and accessories approved
for this model.
1. Throttle cable free play
1

PERIODIC MAINTENANCE AND MINOR REPAIR
6-28
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refilling. Water will significantly
lower the boiling point of the fluid
and may result in vapor lock.


Brake fluid may deteriorate paint-
ed surfaces or plastic parts. Al-
ways clean up spilled fluid
immediately.

As the brake pads wear, it is nor-
mal for the brake fluid level to grad-
ually go down. However, if the
brake fluid level goes down sud-
denly, have a Yamaha dealer
check the cause.
EAU22730
Changing the brake fluid
Have a Yamaha dealer change the
brake fluid at the intervals specified in
the NOTE after the periodic mainte-
nance and lubrication chart. In addition,
have the oil seals of the master cylin-
ders and calipers as well as the brake
hoses replaced at the intervals listed
below or whenever they are damaged
or leaking.

Oil seals: Replace every two
years.

Brake hoses: Replace every four
years.
EAU23100
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 ca-
bles and cable ends should be lubricat-
ed if necessary. If a cable is damaged
or does not move smoothly, have a
Yamaha dealer check or replace it.
WARNING

EWA10720
Damage to the outer sheath may in-
terfere with proper cable operation
and will cause the inner cable to
rust. Replace a damaged cable as
soon as possible to prevent unsafe
conditions.
Recommended lubricant:
Engine oil

PERIODIC MAINTENANCE AND MINOR REPAIR
6-31
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EAU23280
Checking the steering
Worn or loose steering bearings may
cause danger. Therefore, the operation
of the steering must be checked as fol-
lows at the intervals specified in the pe-
riodic maintenance and lubrication
chart.
1. Place a stand under the engine to
raise the front wheel off the
ground.
WARNING

EWA10750
Securely support the vehicle so that
there is no danger of it falling over.
2. Hold the lower ends of the front
fork legs and try to move them for-
ward and backward. If any free
play can be felt, have a Yamaha
dealer check or repair the steering.
EAU23290
Checking the wheel bearings
The front and rear wheel bearings must
be checked at the intervals specified in
the periodic maintenance and lubrica-
tion chart. If there is play in the wheel
hub or if the wheel does not turn
smoothly, have a Yamaha dealer check
the wheel bearings.

PERIODIC MAINTENANCE AND MINOR REPAIR
6-40
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EAU42700
Troubleshooting charts
Starting problems or poor engine
performance
WARNING

EWA10840
Keep away open flames and do not smoke while checking or working on the fuel system.
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.2. Compression
There 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. Ignition
Wipe 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.
Have a Yamaha dealer
check the vehicle.
The engine does not start.
Check the battery.
Operate the electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and charge the battery if necessary.
DryWet
Operate the electric starter.

PERIODIC MAINTENANCE AND MINOR REPAIR
6-41
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9 Engine overheating
WARNING

EWAT1040

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.

Place a thick rag, like a towel, over the radiator cap, and then slowly rotate the cap counterclockwise to the de-
tent to allow any residual pressure to escape. When the hissing sound has stopped, press down on the cap
while turning it counterclockwise, and then remove the cap.
NOTE:

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 NOTE.)
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.

SCOOTER CARE AND STORAGE
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fuel from deteriorating.
3. Perform the following steps to pro-
tect 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 spark-
ing during the next step.)
d. Turn the engine over several
times with the starter. (This will
coat the cylinder wall with oil.)
e. Remove the spark plug cap
from the spark plug, and then
install the spark plug and the
spark plug cap.
WARNING

EWA10950
To prevent damage or injury from
sparking, make sure to ground the
spark plug electrodes while turning
the engine over.
4. Lubricate all control cables and thepivoting points of all levers and
pedals as well as of the sidestand/
centerstand.
5. Check and, if necessary, correct
the tire air pressure, and then lift
the scooter so that both of its
wheels are off the ground. Alterna-
tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.
6. Cover the muffler outlet with a
plastic bag to prevent moisture
from entering it.
7. 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 ex-
cessively cold or warm place [less
than 0 °C (30 °F) or more than 30
°C (90 °F)]. For more information
on storing the battery, see page
6-32.
NOTE:

Make any necessary repairs before
storing the scooter.

INDEX
A
ABS (for ABS models) .............................3-12
ABS warning light (for ABS models) ..........3-4
Acceleration and deceleration ...................5-2
Air filter elements and check hoses and
V-belt case air filter element ..................6-19
Anti-theft alarm (optional) ..........................3-9
Auxiliary light bulb, replacing ...................6-38
B
Battery .....................................................6-32
Brake fluid, changing ...............................6-28
Brake fluid level, checking .......................6-27
Brake lever, front .....................................3-11
Brake lever, rear ......................................3-11
Brake levers, lubricating ..........................6-29
Braking ......................................................5-2
C
Cables, checking and lubricating .............6-28
Care ...........................................................7-1
Catalytic converters .................................3-14
Centerstand and sidestand, checking and
lubricating ..............................................6-29
Coolant ....................................................6-17
Cowlings and panels, removing and
installing ..................................................6-7
D
Dimmer switch .........................................3-10
E
Engine break-in .........................................5-4
Engine oil and oil filter element ................6-13
Engine stop switch...................................3-10
Engine trouble warning light ......................3-4
F
Final transmission oil ...............................6-16Front and rear brake lever free play ........ 6-25
Front and rear brake pads, checking....... 6-26
Front fork, checking ................................. 6-30
Fuel ......................................................... 3-14
Fuel consumption, tips for reducing .......... 5-3
Fuel tank cap ........................................... 3-13
Fuses, replacing ...................................... 6-33
H
Handlebar switches ................................... 3-9
Hazard switch .......................................... 3-10
Headlight bulb, replacing ......................... 6-35
High beam indicator light ........................... 3-3
Horn switch.............................................. 3-10
I
Identification numbers ............................... 9-1
Ignition circuit cut-off system ................... 3-20
Immobilizer system.................................... 3-1
Immobilizer system indicator light ............. 3-4
Indicator and warning lights....................... 3-3
K
Key identification number .......................... 9-1
L
License plate light bulb, replacing ........... 6-38
M
Main switch/steering lock .......................... 3-2
Matte color, caution ................................... 7-1
Model label ................................................ 9-2
Multi-function display ................................. 3-5
P
Parking ...................................................... 5-4
Part locations............................................. 2-1
Pass switch ............................................. 3-10
Periodic maintenance and lubrication
chart ........................................................ 6-3Pre-operation check list............................. 4-2
R
Rear brake lock lever .............................. 3-11
Rear brake lock lever cable, adjusting .... 6-26
Rider seat, adjusting ............................... 3-16
S
Safe-riding points ...................................... 1-4
Safety information ..................................... 1-1
Seats ....................................................... 3-15
Shock absorber assemblies, adjusting.... 3-18
Sidestand ................................................ 3-19
Spark plug, checking ............................... 6-11
Specifications ............................................ 8-1
Speedometer............................................. 3-5
Starting off ................................................. 5-2
Starting the engine .................................... 5-1
Start switch.............................................. 3-10
Steering, checking................................... 6-31
Storage...................................................... 7-3
Storage compartments ............................ 3-17
T
Tachometer ............................................... 3-5
Tail/brake light ......................................... 6-36
Throttle cable free play, checking ........... 6-22
Throttle grip and cable, checking and
lubricating ............................................. 6-29
Tires ........................................................ 6-22
Tool kit....................................................... 6-1
Troubleshooting ...................................... 6-39
Troubleshooting charts............................ 6-40
Turn signal indicator lights ........................ 3-3
Turn signal light bulb (front), replacing .... 6-36
Turn signal light bulb (rear), replacing..... 6-37
Turn signal switch ................................... 3-10