YAMAHA TMAX 2003 Repair Manual

6-16
PERIODIC MAINTENANCE AND MINOR REPAIR
6 4. Install the chain drive oil drain
bolt, and then tighten it to the
specified torque.
5. Add the specified amount of the
recommended oil.
6. Wipe the dipstick clean, insert it
into the oil filler hole (without
screwing it in), and then remove
it to check the oil level.
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Make sure that no foreign material
enters the chain drive case.
NOTE:
The engine oil should be between the
minimum and maximum level marks.
7. 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.
8. Insert the dipstick into the oil filler
hole, and then tighten the oil filler
cap.
1
2
1. Maximum level mark
2. Minimum level mark
Tightening torque:
Chain drive oil drain bolt:
20 Nm (2.0 m·kgf)
Recommended chain drive oil:
See page 8-1.
Oil quantity:
0.7 L
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PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU04964
Coolant
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.
3. Check the coolant level in the
coolant reservoir.
NOTE:
The coolant should be between the
minimum and maximum level marks.
12
1. Maximum level mark
2. Minimum level mark
2. Remove the coolant reservoir
cover by removing the screw.
12
1. Coolant reservoir cover
2. Screw
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PERIODIC MAINTENANCE AND MINOR REPAIR
6 4. 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.
1
1. Coolant reservoir cap
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Never attempt to remove the radia-
tor cap when the engine is hot.
5. Install the coolant reservoir cover
by installing the screw.
NOTE:
The radiator fan is automatically
switched on or off according to the
coolant temperature in the radiator. If
the engine overheats, see page 6-38
for further instructions.
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8
8
If 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.
8 8
If 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.
8 8
If 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.
Coolant reservoir capacity
(up to the maximum level mark):
0.35 L
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PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU03877
Cleaning the air filter
element
Air filter element, cleaning
The air filter element should be
cleaned at the intervals specified in
the periodic maintenance and lubrica-
tion chart. Clean the air filter element
more frequently if you are riding in
unusually wet or dusty areas.
1. Remove cowling A. (See page
6-8 for cowling removal and
installation procedures.)3. Remove the air filter case cover
by removing the screws, and
then pull the air filter element
out.
1
22
1. Air filter case cover
2. Screw (×4)
2. Remove the windshield by
removing the screws.
11
1. Screw (×5)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6
1
1. Air filter element
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8
8
Make sure that the air filter ele-
ment is properly seated in the
air filter case.
8 8
The engine should never be
operated without the air filter
element installed, otherwise
the pistons and/or cylinders
may become excessively
worn.
6. Install the air filter case cover by
installing the screws.
7. Install the windshield and the
cowling. 4. Lightly tap the air filter element to
remove most of the dust and dirt,
and then blow the remaining dirt
out with compressed air as
shown. If the air filter element is
damaged, replace it.
5. Insert the air filter element into
the air filter case.
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PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU00630
Adjusting the carburetorsCarburetors, adjusting
The carburetors are important parts
of the engine and require very
sophisticated adjustment. Therefore,
most carburetor adjustments should
be left to a Yamaha dealer, who has
the necessary professional knowl-
edge and experience. The adjust-
ment described in the following sec-
tion, however, may be serviced by
the owner as part of routine mainte-
nance.
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The carburetors have been set and
extensively tested at the Yamaha
factory. Changing these settings
without sufficient technical knowl-
edge may result in poor perfor-
mance of or damage to the engine.
3. Check the engine idling speed
and, if necessary, adjust it to
specification by turning the throt-
tle stop screw. To increase the
engine idling speed, turn the
screw in direction a. To
decrease the engine idling
speed, turn the screw in direction
b.
1
ab
1. Throttle stop screw
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Adjusting the engine idling
speed
Engine idling speed
The engine idling speed must be
checked and, if necessary, adjusted
as follows at the intervals specified in
the periodic maintenance and lubrica-
tion chart.
The engine should be warm before
making this adjustment.
NOTE:
8The engine is warm when it
quickly responds to the throttle.
8A diagnostic tachometer is need-
ed to make this adjustment.
1. Remove panel B. (See page 6-7
for panel removal and installation
procedures.)
2. Attach the tachometer to the
spark plug lead.Engine idling speed:
1,150–1,200 r/min
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PERIODIC MAINTENANCE AND MINOR REPAIR
6
NOTE:
If the specified idling speed cannot
be obtained as described above,
have a Yamaha dealer make the
adjustment.
4. Install the panel.
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Adjusting the valve
clearance
Valve clearance, adjusting
The valve clearance changes with
use, resulting in improper air-fuel mix-
ture and/or engine noise. To prevent
this from occurring, the valve clear-
ance must be adjusted by a Yamaha
dealer at the intervals specified in the
periodic maintenance and lubrication
chart.
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Adjusting the throttle cable
free play
Throttle cable free play, adjusting
The throttle cable free play should
measure 3–5 mm at the throttle grip.
Periodically check the throttle cable
free play and, if necessary, have a
Yamaha dealer adjust it.
a
a. Throttle cable free play
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PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU04403
TiresTires
To maximize the performance, dura-
bility, and safe operation of your
scooter, 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.
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8 8
The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the tempera-
ture of the tires equals the
ambient temperature).
8 8
The tire air pressure must be
adjusted in accordance with
the riding speed and with the
total weight of rider, passen-
ger, cargo, and accessories
approved for this model.
sories does not exceed the
specified maximum load for
the vehicle.
8 8
Do not carry along loosely
packed items, which can shift
during a ride.
8 8
Securely pack the heaviest
items close to the center of the
scooter and distribute the
weight evenly on both sides.
8 8
Adjust the tire air pressure
with regard to the load.
8 8
Check the tire condition and
air pressure before each ride.
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Because loading has an enormous
impact on the handling, braking,
performance and safety character-
istics of your scooter, you should
keep the following precautions in
mind.
8 8
NEVER OVERLOAD THE
SCOOTER! Operation of an
overloaded scooter may result
in tire damage, loss of control,
or severe injury. Make sure
that the total weight of rider,
passenger, cargo, and acces-
Tire air pressure
(measured on cold tires)
Load* Front Rear
Up to 90 kg
200 kPa
(2.00 kgf/cm2,
2.00 bar)225 kPa
(2.25 kgf/cm2,
2.25 bar)
90 kg–maximum225 kPa
(2.25 kgf/cm2,
2.25 bar)250 kPa
(2.50 kgf/cm2,
2.50 bar)
Maximum load* 183 kg
* Total weight of rider, passenger, cargo and
accessories
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PERIODIC MAINTENANCE AND MINOR REPAIR
6 Tire inspection
The tires must be checked before
each ride. If the center tread depth
reaches the specified limit, if the tire
has a nail or glass fragments in it, or
if the sidewall is cracked, have a
Yamaha dealer replace the tire imme-
diately.
NOTE:
The tire tread depth limits may differ
from country to country. Always com-
ply with the local regulations.
1a
1. Tire sidewall
a. Tire tread depth
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8 8
Have a Yamaha dealer replace
excessively worn tires.
Besides being illegal, operat-
ing the scooter with exces-
sively worn tires decreases
riding stability and can lead to
loss of control.
8 8
The replacement of all wheel
and brake related parts,
including the tires, should be
left to a Yamaha dealer, who
has the necessary profession-
al knowledge and experience.
Tire information
This scooter is equipped with cast
wheels and tubeless tires.
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8 8
The front and rear tires should
be of the same make and
design, otherwise the handling
characteristics of the scooter
cannot be guaranteed.
8 8
After extensive tests, only the
tires listed below have been
approved for this model by
Yamaha Motor Co., Ltd.
Minimum tire tread depth
(front and rear)1.6 mm
FRONT
Manufacturer Size Model
DUNLOP 120/70-14M/C 55S D305FA
BRIDGESTONE120/70-14M/C 55S HOOP B03
REAR
Manufacturer Size Model
DUNLOP 150/70-14M/C 66S D305
BRIDGESTONE150/70-14M/C 66S HOOP B02
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PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU03773
Cast wheelsWheels
To maximize the performance, dura-
bility, and safe operation of your
scooter, note the following points
regarding the specified wheels.
8The wheel rims should be
checked for cracks, bends or
warpage before each ride. If any
damage is found, have a
Yamaha dealer replace the
wheel. Do not attempt even the
smallest repair to the wheel. A
deformed or cracked wheel must
be replaced.
8The wheel should be balanced
whenever either the tire or wheel
has been changed or replaced.
An unbalanced wheel can result
in poor performance, adverse
handling characteristics, and a
shortened tire life.
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Front and rear brake levers
There should be no free play at the
brake lever ends. If there is free play,
have a Yamaha dealer inspect the
brake system.
8Ride at moderate speeds after
changing a tire since the tire sur-
face must first be “broken in” for
it to develop its optimal charac-
teristics.FRONT
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