2004 YAMAHA TW125 battery

TABLE OF CONTENTS
Checking and lubricating the
brake and shift pedals ........... 6-24
Checking and lubricating the
brake and clutch levers ......... 6-24
Checking and lubricating the
sidestand ............................... 6-25
Lubricating the rear
suspension ............................ 6-25
Checking the front fork ............ 6-25
Checking the steering ............. 6-26
Checking the wheel
bearings ................................ 6-27
Battery ..................................... 6-27
Replacing the fuse .................. 6-28
Replacing the headlight bulb ... 6-29
Replacing the tail/brake light
bulb ....................................... 6-31
Replacing a turn signal light
bulb ....................................... 6-31
Supporting the motorcycle ...... 6-32
Front wheel ............................. 6-33
Rear wheel .............................. 6-34
Troubleshooting ...................... 6-36
Troubleshooting chart ............. 6-37
MOTORCYCLE CARE AND
STORAGE..................................... 7-1
Care .......................................... 7-1Storage ..................................... 7-3
SPECIFICATIONS ....................... 8-1
CONSUMER INFORMATION ....... 9-1
Identification numbers ............... 9-1

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DESCRIPTION
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EAU10420
Right view
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2
65 3
4
7
1. Carrier
2. Battery (page 6-27)
3. Engine oil filter element (page 6-7)
4. Engine oil level check window (page 6-7)
5. Brake pedal (page 3-5)
6. Owner’s tool kit (page 6-1)
7. Fuse (page 6-28)

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5-1
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OPERATION AND IMPORTANT RIDING POINTS
EAU15950
WARNING

EWA10270

Become thoroughly familiar
with all operating controls and
their functions before riding.
Consult a Yamaha dealer re-
garding any control or function
that you do not thoroughly un-
derstand.

Never start the engine or oper-
ate it in a closed area for any
length of time. Exhaust fumes
are poisonous, and inhaling
them can cause loss of con-
sciousness and death within a
short time. Always make sure
that there is adequate ventila-
tion.

Before starting out, make sure
that the sidestand is up. If the
sidestand is not raised com-
pletely, it could contact the
ground and distract the opera-
tor, resulting in a possible loss
of control.
EAU16060
Starting a cold engine
In order for the ignition circuit cut-off
system to enable starting, one of the
following conditions must be met:

The transmission is in the neutral
position.

The transmission is in gear with
the clutch lever pulled and the sid-
estand up.
WARNING

EWA10290

Before starting the engine,
check the function of the igni-
tion circuit cut-off system ac-
cording to the procedure
described on page 3-11.

Never ride with the sidestand
down.
1. Turn the fuel cock lever to “ON”.
2. Turn the key to “ON” and make
sure that the engine stop switch is
set to “”.
3. Shift the transmission into the neu-
tral position.
NOTE:

When the transmission is in the neutral
position, the neutral indicator light
should be on, otherwise have a
Yamaha dealer check the electrical cir-
cuit.
4. Turn the starter (choke) on and
completely close the throttle. (See
page 3-8.)
5. Start the engine by pushing the
start switch.
NOTE:

If the engine fails to start, release the
start switch, wait a few seconds, and
then try again. Each starting attempt
should be as short as possible to pre-
serve the battery. Do not crank the en-
gine more than 10 seconds on any one
attempt.
6. After starting the engine, move the
starter (choke) back halfway.
CAUTION:

ECA11040
For maximum engine life, never ac-
celerate hard when the engine is

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PERIODIC MAINTENANCE AND MINOR REPAIR
6-27
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9

EAU23290
Checking the wheel bearings
The front and rear wheel bearings must
be checked at the intervals specified in
the periodic maintenance and lubrica-
tion 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.
EAU23370
Battery
This model is equipped with a
sealed-type (MF) battery, which does
not require any maintenance. There is
no need to check the electrolyte or to
add distilled water.
CAUTION:

ECA10620
Never attempt to remove the battery
cell seals, as this would permanent-
ly damage the battery.
WARNING

EWA10760

Electrolyte is poisonous and
dangerous since it contains sul-furic acid, which causes severe
burns. Avoid any contact with
skin, eyes or clothing and al-
ways shield your eyes when
working near batteries. In case
of contact, administer the fol-
lowing FIRST AID.

EXTERNAL: Flush with plenty
of water.

INTERNAL: Drink large quan-
tities of water or milk and im-
mediately call a physician.

EYES: Flush with water for 15
minutes and seek prompt
medical attention.

Batteries produce explosive hy-
drogen gas. Therefore, keep
sparks, flames, cigarettes, etc.,
away from the battery and pro-
vide sufficient ventilation when
charging it in an enclosed
space.

KEEP THIS AND ALL BATTER-
IES OUT OF THE REACH OF
CHILDREN.
1. Battery1

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PERIODIC MAINTENANCE AND MINOR REPAIR
6-28
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67
8
9 To charge the battery
Have a Yamaha dealer charge the bat-
tery as soon as possible if it seems to
have discharged. Keep in mind that the
battery tends to discharge more quickly
if the vehicle is equipped with optional
electrical accessories.
To store the battery
1. If the vehicle will not be used for
more than one month, remove the
battery, fully charge it, and then
place it in a cool, dry place.
2. If the battery will be stored for more
than two months, check it at least
once a month and fully charge it if
necessary.
3. Fully charge the battery before in-
stallation.
4. After installation, make sure that
the battery leads are properly con-
nected to the battery terminals.
CAUTION:

ECA10630

Always keep the battery
charged. Storing a discharged
battery can cause permanentbattery damage.

To charge a sealed-type (MF)
battery, a special (constant-volt-
age) battery charger is required.
Using a conventional battery
charger will damage the battery.
If you do not have access to a
sealed-type (MF) battery charg-
er, have a Yamaha dealer
charge your battery.
EAU23500
Replacing the fuse
The fuse holder is located behind panel
B. (See page 6-5.)
If the fuse is blown, replace it as fol-
lows.
1. Turn the key to “OFF” and turn off
all electrical circuits.
2. Remove the blown fuse, and then
install a new fuse of the specified
amperage.
1. Fuse
2. Spare fuse
1 2

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PERIODIC MAINTENANCE AND MINOR REPAIR
6-37
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9

EAU25901
Troubleshooting chart
WARNING

EWA10840
Keep away open flames and do not smoke while checking or working on the fuel system.
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.2. Compression
There is compression.
There is no compression.
Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the vehicle.
The engine does not start.
Have a Yamaha dealer
check the vehicle.
The engine does not start.
Check the battery.
Operate the electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and charge the battery if necessary.
DryWet
Open the throttle halfway and operate
the electric starter.

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MOTORCYCLE CARE AND STORAGE
7-4
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from the spark plug, and then
install the spark plug and the
spark plug cap.
WARNING

EWA10950
To prevent damage or injury from
sparking, make sure to ground the
spark plug electrodes while turning
the engine over.
6. Lubricate all control cables and the
pivoting points of all levers and
pedals as well as of the sidestand/
centerstand.
7. Check and, if necessary, correct
the tire air pressure, and then lift
the motorcycle so that both of its
wheels are off the ground. Alterna-
tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.
8. Cover the muffler outlet with a
plastic bag to prevent moisture
from entering it.
9. Remove the battery and fully
charge it. Store it in a cool, dryplace and charge it once a month.
Do not store the battery in an ex-
cessively cold or warm place [less
than 0 °C (30 °F) or more than 30
°C (90 °F)]. For more information
on storing the battery, see page
6-27.
NOTE:

Make any necessary repairs before
storing the motorcycle.

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SPECIFICATIONS
8-2
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4th:
25/27 (0.926)
5th:
23/29 (0.793)
Chassis:
Frame type:
Diamond
Caster angle:
25.8 °
Trail:
93.0 mm (3.66 in)
Front tire:
Type:
With tube
Size:
130/80-18M/C 66P
Manufacturer/model:
BRIDGESTONE/TW-203
Rear tire:
Type:
With tube
Size:
180/80-14M/C 78P
Manufacturer/model:
BRIDGESTONE/TW-204
Loading:
Maximum load:
180 kg (397 lb)
(Total weight of rider, passenger, cargo
and accessories)
Tire air pressure (measured on cold
tires):
Loading condition:
0–90 kg (0–198 lb)
Front:
150 kPa (22 psi) (1.50 kgf/cm
2

)
Rear:
150 kPa (22 psi) (1.50 kgf/cm
2

)
Loading condition:
90–180 kg (198–397 lb)
Front:
150 kPa (22 psi) (1.50 kgf/cm
2

)
Rear:
175 kPa (25 psi) (1.75 kgf/cm
2

)
Front wheel:
Wheel type:
Spoke wheel
Rim size:
18x2.50
Rear wheel:
Wheel type:
Spoke wheel
Rim size:
14M/C x MT4.50
Front brake:
Type:
Single disc brake
Operation:
Right hand operation
Recommended fluid:
DOT 4
Rear brake:
Type:
Drum brake
Operation:
Right foot operation
Front suspension:
Type:
Telescopic fork
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
150.0 mm (5.91 in)
Rear suspension:
Type:
Swingarm (monocross)
Spring/shock absorber type:
Coil spring/gas-oil damper
Wheel travel:
150.0 mm (5.91 in)
Electrical system:
Ignition system:
C.D.I.
Charging system:
A.C. magneto
Battery:
Model:
GT6B-3
Voltage, capacity:
12 V, 6.0 Ah
Headlight:
Bulb type:
Halogen bulb

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