2003 YAMAHA TW125 battery

Adjusting the throttle cable free play .............6-15
Adjusting the valve clearance .......................6-16
Tires ..............................................................6-16
Spoke wheels ................................................6-18
Adjusting the clutch lever free play ...............6-19
Adjusting the brake lever free play ................6-20
Adjusting the brake pedal position and
free play .....................................................6-21
Adjusting the rear brake light switch .............6-22
Checking the front brake pads and
rear brake shoes ........................................6-23
Checking the brake fluid level .......................6-24
Changing the brake fluid ...............................6-25
Drive chain slack ...........................................6-25
Lubricating the drive chain ............................6-27
Checking and lubricating the cables .............6-27
Checking and lubricating the throttle grip
and cable ....................................................6-28
Checking and lubricating the brake and
shift pedals .................................................6-28
Checking and lubricating the brake and
clutch levers ...............................................6-29
Checking and lubricating the sidestand ........6-29
Lubricating the rear suspension ....................6-30
Checking the front fork ..................................6-30
Checking the steering ...................................6-31
Checking the wheel bearings ........................6-31Battery ...........................................................6-32
Replacing the fuse ........................................6-33
Replacing the headlight bulb .........................6-34
Replacing a turn signal light bulb ..................6-36
Replacing the tail/brake light bulb .................6-36
Supporting the motorcycle ............................6-37
Front wheel ...................................................6-38
Rear wheel ....................................................6-40
Troubleshooting ............................................6-42
Troubleshooting chart ...................................6-43
MOTORCYCLE CARE AND STORAGE ............7-1
Care ................................................................7-1
Storage ............................................................7-4
SPECIFICATIONS .............................................8-1
Specifications ..................................................8-1
Conversion table .............................................8-5
CONSUMER INFORMATION ............................9-1
Identification numbers .....................................9-1
Key identification number ................................9-1
Vehicle identification number ..........................9-1
Model label ......................................................9-2
TABLE OF CONTENTS
7
8
9
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2-2
DESCRIPTION
2
10. Carrier (page 3-10)
11. Battery (page 6-32)
12. Engine oil filter element (page 6-9)
13. Engine oil level check window (page 6-9)
14. Brake pedal (page 3-5, 6-21)15. Owner’s tool kit (page 6-1)
16. Fuse (page 6-33)
10
11
15 14 12
1316
Right view
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5-2
OPERATION AND IMPORTANT RIDING POINTS
54. Turn the starter (choke) on and
completely close the throttle.
(See page 3-8 for starter (choke)
operation.)
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
engine more than 10 seconds on any
one attempt.
6. After starting the engine, move
the starter (choke) back halfway.
ECA00045
cC
For maximum engine life, never
accelerate hard when the engine is
cold!
7. When the engine is warm, turn
the starter (choke) off.
NOTE:
The engine is warm when it responds
normally to the throttle with the starter
(choke) turned off.
EAU01258
Starting a warm engine
Follow the same procedure as for
starting a cold engine with the excep-
tion that the starter (choke) is not
required when the engine is warm.1
1. Starter (choke)
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6-32
PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU00800
Battery
This motorcycle 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.
EC000101
cC
Never attempt to remove the bat-
tery cell seals, as this would per-
manently damage the battery.
1
1. Battery
EW000116
w
8Electrolyte is poisonous and
dangerous since it contains
sulfuric acid, which causes
severe burns. Avoid any con-
tact with skin, eyes or clothing
and always shield your eyes
when working near batteries.
In case of contact, administer
the following FIRST AID.
9EXTERNAL: Flush with plen-
ty of water.
9INTERNAL: Drink large quan-
tities of water or milk and
immediately call a physi-
cian.
9EYES: Flush with water for
15 minutes and seek prompt
medical attention.8Batteries produce explosive
hydrogen gas. Therefore, keep
sparks, flames, cigarettes,
etc., away from the battery and
provide sufficient ventilation
when charging it in an
enclosed space.
8KEEP THIS AND ALL BATTER-
IES OUT OF THE REACH OF
CHILDREN.
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6-33
PERIODIC MAINTENANCE AND MINOR REPAIR
6To charge the battery
Have a Yamaha dealer charge the
battery as soon as possible if it
seems to have discharged. Keep in
mind that the battery tends to dis-
charge more quickly if the motorcycle
is equipped with optional electrical
accessories.
To store the battery
1. If the motorcycle 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
installation.
4. After installation, make sure that
the battery leads are properly
connected to the battery termi-
nals.
EC000102
cC
8Always keep the battery
charged. Storing a discharged
battery can cause permanent
battery damage.
8To charge a sealed-type (MF)
battery, a special (constant-
voltage) 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 charger, have a
Yamaha dealer charge your
battery.
EAU01307
Replacing the fuse
The fuse holder is located behind
panel B. (See page 6-6 for panel
removal and installation procedures.)
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 2
1. Fuse
2. Spare fuse
Specified fuse: 20 A
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6-43
PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU01397
Troubleshooting chartEW000125
w
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. FuelThere 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. CompressionThere 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. IgnitionWipe 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. BatteryThe engine turns over
quickly.
The engine turns over
slowly.The battery is good.
Check the battery lead connections,
and charge the battery if necessary.
Dry
WetOpen the throttle halfway and operate
the electric starter.
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7-5
MOTORCYCLE CARE AND STORAGE
7 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.
Alternatively, turn the wheels a
little every month in order to pre-
vent 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, dry
place and charge it once a
month. Do not store the battery
in an excessively cold or warm
place (less than 0 °C) or more
than 30 °C). For more informa-
tion on storing the battery, see
page 6-33.
NOTE:
Make any necessary repairs before
storing the motorcycle.
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8-4
SPECIFICATIONS
8
Electrical
Ignition system C.D.I.
Charging system
Type A.C. magneto
Standard output 14 V, 170W @ 5,000 r/min
Battery
Type GT6B-3
Voltage, capacity 12 V, 6 Ah
Headlight bulb typeHalogen bulb
Bulb voltage, wattage ×quantity
Headlight 12 V, 60/55 W ×1
Tail/brake light 12 V, 5/21 W ×1
Front turn signal light 12 V, 21 W ×2
Rear turn signal light 12 V, 21 W ×2
Auxiliary light 12 V, 4 W ×1
Meter lighting 12 V, 3.4 W ×1
Neutral indicator light 12 V, 3.4 W ×1
High beam indicator light 12 V, 3.4 W ×1
Turn signal indicator light 12 V, 3.4 W ×1
Fuse20 A
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