2005 YAMAHA MAJESTY 400 light

PERIODIC MAINTENANCE AND MINOR REPAIR
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EAU34171
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. Open the rider seat. (See
page 3-14.)
2. Pull up the storage compartment
mat, and then remove the spark
plug cover by removing the
screws.3. Remove the spark plug cap.
4. 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 vehicle 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 vehicle.
2. Check the spark plug for electrode
erosion and excessive carbon or
other deposits, and replace it if
1. Storage compartment mat
2. Spark plug cover
3. Screw
1. Spark plug cap
1
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3(×3)
1

1. Spark plug wrench
1

PERIODIC MAINTENANCE AND MINOR REPAIR
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EAU34181
Engine oil and oil filter
element
The engine oil level should be checked
before each ride. In addition, the oil
must be changed and the oil filter ele-
ment replaced at the intervals specified
in the periodic maintenance and lubri-
cation chart and when the oil change in-
dicator comes on.
To check the engine oil level
1. Place the vehicle on the center-
stand.
NOTE:

Make sure that the vehicle is positioned
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 itagain 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.
5. Insert the dipstick into the oil filler
hole, and then tighten the oil filler
cap.
To change the engine oil (with or
without oil filter element replace-
ment)
1. Start the engine, warm it up for
several minutes, and then turn it
off.
2. Place an oil pan under the engine
to collect the used oil.
3. Remove the engine oil filler cap
and the engine oil drain bolt to
drain the oil from the crankcase.
4. Check the washer for damage and
replace it if necessary.
1. Engine oil filler cap
2. Maximum level mark
3. Minimum level mark
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1. Engine oil drain bolt
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WARNING

EWA11310

Make sure that no foreign mate-
rial enters the final transmission
case.

Make sure that no oil gets on the
tire or wheel.
7. Check the final transmission case
for oil leakage. If oil is leaking,
check for the cause.
EAU20070
Coolant
The coolant level should be checked
before each ride. In addition, the cool-
ant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAU34191
To check the coolant level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.
NOTE:


The coolant level must be checked
on a cold engine since the level
varies with engine temperature.

Make sure that the vehicle is posi-
tioned straight up when checking
the coolant level. A slight tilt to the
side can result in a false reading.
2. Pull up the right floorboard mat as
shown.3. Remove the coolant reservoir cov-
er by removing the screw.
4. Check the coolant level in the cool-
ant reservoir.
1. Right floorboard mat
1. Screw
2. Coolant reservoir cover
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1
2

PERIODIC MAINTENANCE AND MINOR REPAIR
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5. Lightly tap the V-belt case air filter
element to remove most of the
dust and dirt, and then blow out the
dirt with compressed air as shown.
6. Check the V-belt case air filter ele-
ment for damage and replace it ifnecessary.
7. Install the V-belt case air filter ele-
ment by installing the screws.
8. Install the V-belt air filter case cov-
er by installing the screws.
CAUTION:

ECA12940
Make sure that the V-belt filter ele-
ment is properly seated in its case.
9. Install the panel.
10. Install the cowling.
EAU21381
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. Screw
2. V-belt case air filter element (page 6-18)
2
1
(×4)1

1. Throttle cable free play
1

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CAUTION:

ECA10640
Do not use a fuse of a higher amper-
age rating than recommended to
avoid causing extensive damage to
the electrical system and possibly a
fire.
3. Turn the key to “ON” and turn on
the electrical circuit in question to
check if the device operates.
4. If the fuse immediately blows
again, have a Yamaha dealer
1. Spare main fuse
2. Main fuse
1. Fuse box
2. Hazard fuse
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2

1. Ignition fuse
2. Signaling system fuse
3. Headlight fuse
4. Radiator fan fuse
5. Backup fuse (for odometer and clock)
6. Electronic fuel injection fuse
7. Spare fuse
7
123456

Specified fuses:
Main fuse:
40.0 A
Ignition fuse:
10.0 A
Signaling system fuse:
10.0 A
Headlight fuse:
25.0 A
Hazard fuse:
10.0 A
Radiator fan fuse:
10.0 A
Electronic fuel injection fuse:
10.0 A
Backup fuse:
10.0 A

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check the electrical system.

EAU34240
Replacing a headlight bulb
This model is equipped with quartz bulb
headlights. If a headlight bulb burns
out, have a Yamaha dealer replace it
and, if necessary, adjust the headlight
beam.
EAU24180
Tail/brake light
This model is equipped with an LED
type of tail/brake light.
If the tail/brake light does not come on,
have a Yamaha dealer check it.

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EAU34250
Replacing a front turn signal
light bulb or an auxiliary light
bulb
1. Place the scooter on the center-
stand.
2. Remove panel A. (See page 6-6.)
3. Remove the windshield by remov-
ing the screws.
4. Remove the front turn signal light
and auxiliary light unit by removing
the screws.5. Remove the socket (together with
the bulb) by turning it counter-
clockwise.6. To remove the defective turn sig-
nal light bulb, push it in and turn it
counterclockwise. To remove the
defective auxiliary light bulb, pull it
out.
7. To insert a new turn signal light
bulb into the socket, push it in, and
then turn it clockwise until it stops.
To install a new auxiliary light bulb,
push it into the socket.
8. Install the socket (together with the
bulb) by turning it clockwise.
9. Place the turn signal light and aux-
iliary light unit in the original posi-
tion, and then install the screws.
10. Install the windshield by installing
the screws.
1. Screw
2. Windshield
1(×6)
2

1. Screw
2. Front turn signal light and auxiliary light
unit
1. Turn signal light bulb socket
2. Auxiliary light bulb socket
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11. Install panel A.

EAU34260
Replacing a rear turn signal
light bulb
1. Place the scooter on the center-
stand.
2. Remove cowling C for replacing
the left turn signal light bulb or
cowling D for replacing the right
turn signal light bulb. (See
page 6-6.)
3. Remove the socket (together with
the turn signal light bulb) by turning
it counterclockwise.
4. Remove the defective bulb by
pushing it in and turning it counter-
clockwise.5. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.
6. Install the socket (together with the
bulb) by turning it clockwise.
7. Install the cowling removed.
1. Turn signal light bulb socket
1