light YAMAHA MAJESTY 400 2010 Owner's Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
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2. Install the screw access cover by
placing it in its original position.
3. Install the grab bar by installing the
collars and grab bar bolts.
4. Install the passenger seat.
5. Install cowlings A and B.
Cowling E
To remove the cowling
1. Pull up the left floorboard mats as
shown.2. Remove the cowling screws.
3. Pull the cowling down slightly, and
then pull it outward as shown.To install the cowling
1. Insert the projections on the cowl-
ing into the slots as shown, and
then install the screws.
2. Place the left floorboard mats in
the original position.

Tightening torque:
Grab bar bolt:
23 Nm (2.3 m·kgf, 16.6 ft·lbf)
1. Left floorboard mat
1. Screw
1
1
1. Cowling E
1. Projection
1
1
1

PERIODIC MAINTENANCE AND ADJUSTMENT
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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).
TIP

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 check
the vehicle.
2. Check the spark plug for elec-
trode erosion and excessive car-
bon or other deposits, and replaceit 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.
2. Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
1. Storage compartment mat
2. Spark plug cover
3. Screw
1. Spark plug cap
1
2
3
1

1. Spark plug wrench
1

Specified spark plug:
NGK/CR7E
1. Spark plug gap
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
1

PERIODIC MAINTENANCE AND ADJUSTMENT
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3. Install the spark plug with the
spark plug wrench, and then tight-
en it to the specified torque.
TIP

If 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.
TIP

Make sure the spark plug wire is fas-
tened in the clamp as shown.5. Install the spark plug cover by in-
stalling the screws.
6. Place the storage compartment
mat in the original position.
7. Close the rider seat.
EAU34187
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. 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 it
again to check the oil level.
TIP

The engine oil should be between the
tip of the dipstick and the maximum lev-
el mark.
Tightening torque:
Spark plug:
12.5 Nm (1.25 m·kgf, 9 ft·lbf)
1. Spark plug cap
2. Spark plug wire clamp
1
2

PERIODIC MAINTENANCE AND ADJUSTMENT
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9tire 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.
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.
EAU34193
To check the coolant level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.
TIP


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.
Recommended final transmission
oil:
See page 8-1.
Oil quantity:
0.25 L (0.26 US qt, 0.22 Imp.qt)
1. Right floorboard mat
1. Screw
2. Coolant reservoir cover
1
1
2

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9 Left
Right
2. If dirt or water is visible, remove
the hose, clean it, and then install
it.
Cleaning the V-belt case air filter el-
ement
1. Remove cowling E. (See
page 6-7.)
2. Remove panel A. (See page 6-7.)
3. Remove the left air filter case cov-
er.
4. Remove the V-belt air filter case
cover by removing the screws.
5. Remove the V-belt case air filter
element by removing the screws.6. 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.
7. Check the V-belt case air filter ele-
ment for damage and replace it if
necessary.

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

1. Screw
2. V-belt air filter case cover
2
111

1. Screw
2. V-belt case air filter element
2
1 1

PERIODIC MAINTENANCE AND ADJUSTMENT
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9For YP400A For YP400
For YP400AFor YP400

1. Spare main fuse
2. Main fuse
3. Hazard fuse
4. ABS control unit fuse
5. ABS solenoid fuse
6. ABS motor fuse
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3
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1. Fuse box
1. Fuse box
11

1. Ignition fuse
2. Signaling system fuse
3. Headlight fuse
4. Radiator fan fuse
5. Backup fuse (for clock and rear storage
compartment light)
6. Fuel injection system fuse
7. Spare fuse
7
123456

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9 For YP400A
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
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.
1. Ignition fuse
2. Signaling system fuse
3. Headlight fuse
4. Radiator fan fuse
5. Backup fuse (for clock and rear storage
compartment light)
6. Fuel injection system 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:
20.0 A
Hazard fuse:
10.0 A
Radiator fan fuse:
10.0 A
Fuel injection system fuse:
10.0 A
ABS control unit fuse:
YP400A 10.0 A
ABS motor fuse:
YP400A 30.0 A
ABS solenoid fuse:
YP400A 20.0 A
Backup fuse:
10.0 A

PERIODIC MAINTENANCE AND ADJUSTMENT
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EAU24181
Tail/brake light
This model is equipped with an
LED-type tail/brake light.
If the tail/brake light does not come on,
have a Yamaha dealer check it.
EAU39880
Front turn signal light
If a front turn signal light does not come
on, have a Yamaha dealer check its
electrical circuit or replace the bulb.
EAU34263
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 6-7.)
3. Remove the socket (together with
the turn signal light bulb) by turning
it counterclockwise.
4. Remove the burnt-out bulb by
pushing it in and turning it counter-
clockwise.
5. Insert a new bulb into the socket,
1. Turn signal light bulb socket
1

PERIODIC MAINTENANCE AND ADJUSTMENT
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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.

EAU47900
Replacing the license plate
light bulb
1. Place the scooter on the center-
stand.
2. Remove cowling B. (See
page 6-7.)
3. Remove the license plate light cov-
er and license plate light lens by
removing the screws.
4. Remove the burnt-out bulb by pull-
ing it out.5. Insert a new bulb into the socket.
6. Install the license plate light lens
and license plate light cover by in-
stalling the screws.
7. Install the cowling.
1. Turn signal light bulb
2. Turn signal light bulb socket
2
1

1. License plate light lens
2. License plate light cover
3. Screw
2
3
1

1. License plate light bulb
1

PERIODIC MAINTENANCE AND ADJUSTMENT
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EAU39020
Auxiliary light bulb
If the auxiliary light does not come on,
have a Yamaha dealer check the elec-
trical circuit or replace the bulb.
EAU25881
Troubleshooting
Although Yamaha scooters receive a
thorough inspection before shipment
from the factory, trouble may occur dur-
ing operation. Any problem in the fuel,
compression, or ignition systems, for
example, can cause poor starting and
loss of power.
The following troubleshooting charts
represent quick and easy procedures
for checking these vital systems your-
self. However, should your scooter re-
quire any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the scooter prop-
erly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look like
Yamaha parts, but they are often inferi-
or, have a shorter service life and can
lead to expensive repair bills.
WARNING

EWA15141
When checking the fuel system, do
not smoke, and make sure there are
no open flames or sparks in the ar-
ea, including pilot lights from waterheaters or furnaces. Gasoline or
gasoline vapors can ignite or ex-
plode, causing severe injury or
property damage.