engine YAMAHA MAJESTY 250 2001 Owner's Manual

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1.Tab (´4)To install the panelPlace the panel in the original posi-
tion, and then install the bolts.
1
To remove the spark plug
1.Remove cowling B. (See page
6-8 for cowling removal and
installation procedures.)
2.Remove the spark plug cap.1.Spark plug cap
EAU03620
Checking the spark plugThe 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 maintenance and lubrication
chart. In addition, the condition of the
spark plug can reveal the condition of
the engine.
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1
3.Remove the spark plug as
shown, with the spark plug
wrench included in the ownerÕs
tool kit.1.Spark plug wrench
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9To check the spark plug
1.Check that the porcelain insula-
tor around the center electrode
of the spark plug is a medium-to-
light tan (the ideal color when the
scooter is ridden normally).
NOTE:
If the spark plug shows a distinctly
different color, the engine could be
defective. Do not attempt to diagnose
such problems yourself. Instead,
have a Yamaha dealer check the
scooter.2.Check the spark plug for elec-
trode erosion and excessive car-
bon or other deposits, and
replace it if necessary.
a
a.Spark plug gap
Spark plug gap:
0.6Ð0.7 mm
To install the spark plug
1.Measure the spark plug gap with
a wire thickness gauge and, if
necessary, adjust the gap to
specification.
2.Clean the surface of the spark
plug gasket and its mating sur-
face, and then wipe off any grime
from the spark plug threads.
3.Install the spark plug with the
spark plug wrench, and then
tighten it to the specified torque. Specified spark plug:
DR8EA (NGK)
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NOTE:
If a torque wrench is not available
when installing a spark plug, a good
estimate of the correct torque is
1/4Ð1/2 turn past finger tight.
However, the spark plug should be
tightened to the specified torque as
soon as possible.4.Install the spark plug cap.
5.Install the cowling. Tightening torque:
Spark plug:
17.5 Nm (1.75 m0kg)
EAU03119
Engine oilThe engine oil level should be
checked before each ride. In addition,
the oil must be changed at the inter-
vals specified in the periodic mainte-
nance and lubrication chart and when
the oil change indicator light comes
on.To check the engine oil level
1.Place the scooter on the center-
stand.
NOTE:
Make sure that the scooter is posi-
tioned 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.
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93.Wait a few minutes until the oil
settles, remove the oil filler cap,
wipe the dipstick clean, insert it
back into the oil filler hole (with-
out screwing it in), and then
remove it again to check the oil
level.
NOTE:
The engine oil should be between the
minimum and maximum level marks.
3121
1.Engine oil filler cap
2.Maximum level mark
3.Minimum level mark
4.If the engine oil is below the min-
imum 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.

1
1.Engine oil drain boltTo change the engine oil
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.
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4.Check the washer for damage
and replace it if necessary.
5.Install the washer and the engine
oil drain bolt, and then tighten
the drain bolt to the specified
torque.NOTE:
Make sure that the washer is properly
seated.1.Engine oil drain bolt
2.Washer
Tightening torque:
Engine oil drain bolt:
20 Nm (2.0 m0kg)
6.Add the specified amount of the
recommended engine oil, and
then install and tighten the oil
filler cap.
EC000030
cC8Do not put in any chemical
additives or use oils with a
grade of CD or higher. Also, be
sure not to use oils labeled
ÒENERGY CONSERVING
IIÓ or
higher.
8Be sure no foreign material
enters the crankcase.
Recommended oil:
See page 8-1.
Oil quantity:
Periodic oil change:
1.2 L
Total amount (dry engine):
1.4 L
7.Start the engine, and then let it
idle for several minutes while
checking it for oil leakage. If oil is
leaking, immediately turn the
engine off and check for the
cause.
8.Reset the oil change indicator
light according to the following
procedure.
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To reset the oil change indicator
light
1.Turn the key to ÒONÓ.
2.Hold the reset button pushed for
two to five seconds.
3.Release the reset button, and
the oil change indicator light will
go off.1.Reset button
NOTE:
If the engine oil is changed before the
oil change indicator light comes on
(i.e. before the periodic oil change
interval has been reached), the indi-
cator light must be reset after the oil
change for the next periodic oil
change to be indicated at the correct
time. To reset the oil change indicator
light before the periodic oil change
interval has been reached, follow the
above procedure, but note that the
indicator light will come on for 1.4
seconds after releasing the reset but-
ton, otherwise repeat the procedure.
EAU03469
Final gear oilThe final gear 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 gear oil
must be changed as follows at the
intervals specified in the periodic
maintenance and lubrication chart.
1.Start the engine, warm it up by
riding the scooter for several
minutes, and then stop the
engine.
2.Place the scooter on the center-
stand.NOTE:
Make sure that the scooter is posi-
tioned straight up when checking the
oil level. A slight tilt to the side can
result in a false reading.3.Place an oil pan under the final
gear case to collect the used oil.
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4.Remove the oil filler cap and
drain bolt to drain the oil from the
final gear case.
5.Install the final gear oil drain bolt,
and then tighten it to the speci-
fied torque.
6.Add the specified amount of the
recommended final gear oil, and
then install and tighten the oil
filler cap.
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1.Final gear oil filler cap
Tightening torque:
Final gear oil drain bolt:
22 Nm (2.2 m0kg)
EW000066
w8Make sure that no foreign
material enters the final gear
case.
8Make sure that no oil gets on
the tire or wheel.7.Check the final gear case for oil
leakage. If oil is leaking, check
for the cause.
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1.Final gear oil drain bolt
Recommended final gear oil:
See page 8-2.
Oil quantity:
0.25 L
EAU01587
CoolantThe coolant reservoir is located
under the battery cover. (See page
6-31 for battery cover removal proce-
dures.)
To check the coolant level
1.Place the scooter on a level sur-
face and hold it in an upright
position.NOTE:
8The coolant level must be
checked on a cold engine since
the level varies with engine tem-
perature.
8Make sure that the scooter is
positioned straight up when
checking the coolant level. A
slight tilt to the side can result in
a false reading.
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2.Check the coolant level in the
coolant reservoir.NOTE:
The coolant should be between the
minimum and maximum level marks.1.Maximum level mark
2.Minimum level mark
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1.Coolant reservoir cap3.If the coolant is at or below the
minimum level mark, open the
reservoir cap, add coolant to the
maximum level mark, and then
close the reservoir cap.
4.Install the battery cover. Coolant reservoir capacity:
0.4 L
EC000080
cC8If coolant is not available, use
distilled water or soft tap water
instead. Do not use hard water
or salt water since it is harmful
to the engine.
8If water has been used instead
of coolant, replace it with
coolant as soon as possible,
otherwise the engine may not
be sufficiently cooled and the
cooling system will not be pro-
tected against frost and corro-
sion.
8If water has been added to the
coolant, have a Yamaha dealer
check the antifreeze content of
the coolant as soon as possi-
ble, otherwise the effective-
ness of the coolant will be
reduced.
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NOTE:
The radiator fan is automatically
switched on or off according to the
coolant temperature in the radiator. If
the engine overheats, see page 6-40
for further instructions.
Cleaning 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 sponge material out
along with the mesh sheet, clean
it with solvent, and then squeeze
the remaining solvent out.
EAU03627
Air filter and V-belt case air
filter elementsThe air filter and V-belt case air filter
elements should be cleaned at the
intervals specified in the periodic
maintenance and lubrication chart.
Clean both filter elements more fre-
quently if you are riding in unusually
wet or dusty areas.
EC000092
cC8Make sure that each filter ele-
ment is properly seated in its
case.
8The engine should never be
operated without the filter ele-
ments installed, otherwise the
piston(s) and/or cylinder(s)
may become excessively
worn.
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1.Air filter case cover
2.Screw (´5)
3.Sponge material
4.Mesh sheet
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NOTE:
The sponge material should be wet
but not dripping.7.Insert the sponge material into
the air filter case.
8.Install the air filter case cover by
installing the screws. Recommended oil:
Engine oil
4.Check the sponge material for
damage and replace it if neces-
sary.
5.Allow the sponge material to dry.
6.Apply oil of the recommended
type to the entire surface of the
sponge material, and then
squeeze the excess oil out.
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1.V-belt case air filter cover
2.Screw (´3)Cleaning the V-belt case air filter
element
1.Remove cowling A (See page
6-7 for cowling removal and
installation procedures.)
2.Remove the air filter case cover
by removing the screws.
3.Remove the V-belt case air filter
cover by removing the screws.
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