2003 YAMAHA TW125 ECU

3-9
INSTRUMENT AND CONTROL FUNCTIONS
3 4. Check that the steering is locked,
remove the key, and then close
the lock cover.
To unlock the steering
1. Open the steering lock cover,
and then insert the steering lock
key.
2. Push the key in, turn it 1/8 turn
counterclockwise so that it
moves out, and then release it.
3. Remove the key, and then close
the lock cover.
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Seat
To remove the seat
Remove the bolts, and then pull the
seat off.
1
1. Bolt (×2)
To install the seat
1. Insert the projection on the front
of the seat into the seat holder
as shown.
2. Place the seat in the original
position, and then tighten the
bolts.
NOTE:
Make sure that the seat is properly
secured before riding.
12
1. Projection
2. Seat holder
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PERIODIC MAINTENANCE AND MINOR REPAIR
6
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Because loading has an enormous
impact on the handling, braking,
performance and safety character-
istics of your motorcycle, you
should keep the following precau-
tions in mind.
8NEVER OVERLOAD THE
MOTORCYCLE! Operation of
an overloaded motorcycle may
result in tire damage, loss of
control, or severe injury. Make
sure that the total weight of
rider, passenger, cargo, and
accessories does not exceed
the specified maximum load
for the vehicle.
8Do not carry along loosely
packed items, which can shift
during a ride.
8Securely pack the heaviest
items close to the center of the
motorcycle and distribute the
weight evenly on both sides.8Adjust the tire air pressure
with regard to the load.
8Check the tire condition and
air pressure before each ride.
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 side wall
a. Tire tread depth
Minimum tire tread depth
(front and rear)1.6 mm
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PERIODIC MAINTENANCE AND MINOR REPAIR
6
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Lubricating the rear
suspension
The pivoting points of the rear sus-
pension must be lubricated at the
intervals specified in the periodic
maintenance and lubrication chart.
1
1. Grease nipple (×2)
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Checking the front fork
The condition and operation of the
front fork must be checked as follows
at the intervals specified in the peri-
odic maintenance and lubrication
chart.
To check the condition
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Securely support the motorcycle
so that there is no danger of it
falling over.
Check the inner tubes for scratches,
damage and excessive oil leakage.To check the operation
1. Place the motorcycle on a level
surface and hold it in an upright
position.
2. While applying the front brake,
push down hard on the handle-
bars several times to check if the
front fork compresses and
rebounds smoothly.
EC000098
cC
If any damage is found or the front
fork does not operate smoothly,
have a Yamaha dealer check or
repair it.
Recommended lubricant:
Lithium-soap-based grease
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PERIODIC MAINTENANCE AND MINOR REPAIR
6
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Checking the steering
Worn or loose steering bearings may
cause danger. Therefore, the opera-
tion of the steering must be checked
as follows at the intervals specified in
the periodic maintenance and lubrica-
tion chart.
1. Place a stand under the engine
to raise the front wheel off the
ground.
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Securely support the motorcycle
so that there is no danger of it
falling over.
2. Hold the lower ends of the front
fork legs and try to move them
forward and backward. If any
free play can be felt, have a
Yamaha dealer check or repair
the steering.
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Checking the wheel bearings
The front and rear wheel bearings
must be checked at the intervals
specified in the periodic maintenance
and lubrication chart. If there is play
in the wheel hub or if the wheel does
not turn smoothly, have a Yamaha
dealer check the wheel bearings.
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6-35
PERIODIC MAINTENANCE AND MINOR REPAIR
63. Unhook the headlight bulb hold-
er, and then remove the defec-
tive bulb.EW000119
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Headlight bulbs get very hot.
Therefore, keep flammable prod-
ucts away from a lit headlight bulb,
and do not touch the bulb until it
has cooled down.
4. Place a new headlight bulb into
position, and then secure it with
the bulb holder.
1
1. Headlight bulb holder
EC000105
cC
Do not touch the glass part of the
headlight bulb to keep it free from
oil, otherwise the transparency of
the glass, the luminosity of the
bulb, and the bulb life will be
adversely affected. Thoroughly
clean off any dirt and fingerprints
on the headlight bulb using a cloth
moistened with alcohol or thinner.
a
a. Do not touch the glass part of the bulb.
5. Install the headlight bulb cover,
and then connect the coupler.
6. Install the headlight unit by
installing the screws.
7. Have a Yamaha dealer adjust
the headlight beam if necessary.
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PERIODIC MAINTENANCE AND MINOR REPAIR
6
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Front wheel
To remove the front wheelEW000122
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8It is advisable to have a
Yamaha dealer service the
wheel.
8Securely support the motorcy-
cle so that there is no danger
of it falling over.
1. Pull outward on the rubber cover
at the bottom of the right-side
fork leg, and then slide it up
along the fork leg.
1
1. Rubber cover
2. Pull outward on the rubber cover
at the bottom of the left-side fork
leg, and then pull it off.
1
1. Rubber cover
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PERIODIC MAINTENANCE AND MINOR REPAIR
6
NOTE:
Make sure that there is enough
space between the brake pads
before inserting the brake disc and
that the slot in the speedometer gear
unit fits over the retainer on the fork
leg.
3. Insert the wheel axle, and then
install the axle nut.
4. Lower the front wheel so that it is
on the ground.
2 1
1. Retainer
2. Speedometer cable
5. Tighten the axle nut to the speci-
fied torque.
6. Place the rubber cover at the
bottom of the right-side fork leg
in the original position.
7. Install the rubber cover at the
bottom of the left-side fork leg.
8. Connect the speedometer cable.
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Rear wheel
To remove the rear wheelEW000122
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8It is advisable to have a
Yamaha dealer service the
wheel.
8Securely support the motorcy-
cle so that there is no danger
of it falling over.
1. Loosen the axle nut.
5a
2
1
34
1. Axle nut
2. Brake pedal free play adjusting nut
3. Brake rod
4. Brake camshaft lever
5. Drive chain adjusting plate
Tightening torque:
Axle nut:
90 Nm (9.0 m·kgf)
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