engine overheat YAMAHA MAJESTY 250 2001 Owners Manual

3-4
INSTRUMENT AND CONTROL FUNCTIONS
1
23
4
5
6
7
8
9
1
EAU00110
Fuel gaugeThe fuel gauge indicates the amount
of fuel in the fuel tank. The needle
moves towards ÒEÓ (Empty) as the
fuel level decreases. When the nee-
dle reaches ÒEÓ, approximately 1.0 L
of fuel remain in the fuel tank. If this
occurs, refuel as soon as possible.NOTE:
Do not allow the fuel tank to empty
itself completely.1.Fuel gauge
1
2
1.Coolant temperature gauge
2.Red mark
EAU03124
Coolant temperature gaugeThis gauge indicates the coolant tem-
perature when the main switch is on.
The engine operating temperature
will vary with changes in weather and
engine load. If the needle points to
the red mark, stop your scooter and
let the engine cool. (See page
6-18 for details.)
EC000002
cCDo not operate the engine if it is
overheated.
EAU00109
Anti-theft alarm (optional)This scooter can be equipped with an
optional anti-theft alarm by a Yamaha
dealer. Contact a Yamaha dealer for
more information.
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5-4
EAU03123
0Ð1,000 km
Avoid operation above 1/3 throttle.
1,000Ð1,600 km
Avoid cruising speeds in excess of
1/2 throttle.
ECA00054
cCAfter 1,000 km of operation, be
sure to replace the engine oil and
final gear oil.1,600 km and beyond
Proceed with normal riding.
EC000049
cCIf any engine trouble should occur
during the engine break-in period,
immediately have a Yamaha dealer
check the vehicle.
OPERATION AND IMPORTANT RIDING POINTS
1
2
3
45
6
7
8
9
EAU01128
Engine break-inThere is never a more important peri-
od in the life of your engine than the
period between 0 and 1,600 km. For
this reason, you should read the fol-
lowing material carefully.
Since the engine is brand new, do
not put an excessive load on it for the
first 1,600 km. The various parts in
the engine wear and polish them-
selves to the correct operating clear-
ances. During this period, prolonged
full-throttle operation or any condition
that might result in engine overheat-
ing must be avoided.
EAU03093
Tips for reducing fuel
consumptionFuel consumption depends largely on
your riding style. Consider the follow-
ing tips to reduce fuel consumption:
8Thoroughly warm up the engine.
8Avoid high engine speeds during
acceleration.
8Avoid high engine speeds with
no load on the engine.
8Turn the engine off instead of let-
ting it idle for an extended length
of time (e.g., in traffic jams, at
traffic lights or at railroad cross-
ings).
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6-20
PERIODIC MAINTENANCE AND MINOR REPAIR
1
2
3
4
56
7
8
9
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.
1
2 2
3
4
1.Air filter case cover
2.Screw (´5)
3.Sponge material
4.Mesh sheet
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6-40
PERIODIC MAINTENANCE AND MINOR REPAIR
1
2
3
4
56
7
8
9 Engine overheating
EW000070
w8Do 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.
8After 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
hissing sound has stopped, press down on the cap while turning it counterclockwise, and then remove the
cap.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.
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.
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