2004 YAMAHA TW125 Owners Manual

PERIODIC MAINTENANCE AND MINOR REPAIR
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EAU24360
Front wheel
EAU24590
To remove the front wheel
WARNING

EWA10820

It is advisable to have a Yamaha
dealer service the wheel.

Securely 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.
2. Pull outward on the rubber cover at
the bottom of the left-side fork leg,and then pull it off.
3. Disconnect the speedometer ca-
ble from the front wheel.
4. Loosen the axle nut.
5. Lift the front wheel off the groundaccording to the procedure on
page 6-32.
6. Remove the axle nut, pull the
wheel axle out, and then remove
the wheel.
CAUTION:

ECA11070
Do not apply the brake after the
wheel has been removed together
with the brake disc, otherwise the
brake pads will be forced shut.
EAU24991
To install the front wheel
1. Install the speedometer gear unit
into the wheel hub so that the pro-
jections mesh with the slots.
1. Rubber cover
1

1. Rubber cover
1. Speedometer cable
2. Axle nut
1
1
2
1. Speedometer gear unit
1

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2. Lift the wheel up between the fork
legs.
NOTE:

Make sure that there is enough space
between the brake pads before insert-
ing 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 in-
stall the axle nut.
4. Lower the front wheel so that it is
on the ground.
5. Tighten the axle nut to the speci-fied torque.
6. Place the rubber cover at the bot-
tom of the right-side fork leg in the
original position.
7. Install the rubber cover at the bot-
tom of the left-side fork leg.
8. Connect the speedometer cable.
EAU25080
Rear wheel
EAU25420
To remove the rear wheel
WARNING

EWA10820

It is advisable to have a Yamaha
dealer service the wheel.

Securely support the motorcy-
cle so that there is no danger of
it falling over.
1. Loosen the axle nut.
2. Remove the brake pedal free play
1. Retainer
2. Speedometer cable
2 1

Tightening torque:
Axle nut:
90 Nm (9.0 m·kgf, 65.1 ft·lbf)
1. Axle nut
2. Brake pedal free play adjusting nut
3. Brake rod
4. Brake camshaft lever
5. Drive chain slack adjusting plate
5
2
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(a)

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PERIODIC MAINTENANCE AND MINOR REPAIR
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adjusting nut, and then disconnect
the brake rod from the brake cam-
shaft lever.
3. Turn the drive chain adjusting
plate on each side of the swingarm
fully in direction (a).
4. Lift the rear wheel off the ground
according to the procedure on
page 6-32.
5. Remove the axle nut, and then pull
the wheel axle out.
6. Push the wheel forward, and then
remove the drive chain from the
rear sprocket.
NOTE:

The drive chain does not need to be
disassembled in order to remove and
install the wheel.
7. Remove the wheel.
EAU25761
To install the rear wheel
1. Insert the wheel axle from the
left-hand side.
NOTE:

Make sure that the drive chain adjust-
ing plates are installed with thepunched sides facing to the outside
and that the slot in the brake shoe plate
fits over the retainer on the swingarm.
2. Install the drive chain onto the rear
sprocket, and then adjust the drive
chain slack. (See page 6-21.)
3. Install the axle nut, and then lower
the rear wheel so that it is on the
ground.
4. Tighten the axle nut to the speci-
fied torque.5. Install the brake rod onto the brake
camshaft lever, and then install the
brake pedal free play adjusting nut
onto the brake rod.
6. Adjust the brake pedal free play.
(See page 6-18.)
WARNING

EWA10660
After adjusting the brake pedal free
play, check the operation of the
brake light.
1. Retainer
Tightening torque:
Axle nut:
90 Nm (9.0 m·kgf, 65.1 ft·lbf)
1

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EAU25850
Troubleshooting
Although Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur dur-
ing operation. Any problem in the fuel,
compression, or ignition systems, for
example, can cause poor starting and
loss of power.
The following troubleshooting chart
represents a quick and easy procedure
for checking these vital systems your-
self. However, should your motorcycle
require any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the motorcycle
properly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look like
Yamaha parts, but they are often inferi-
or, have a shorter service life and can
lead to expensive repair bills.

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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
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9

EAU26000
Care
While the open design of a motorcycle
reveals the attractiveness of the tech-
nology, it also makes it more vulnera-
ble. Rust and corrosion can develop
even if high-quality components are
used. A rusty exhaust pipe may go un-
noticed on a car, however, it detracts
from the overall appearance of a motor-
cycle. Frequent and proper care does
not only comply with the terms of the
warranty, but it will also keep your mo-
torcycle looking good, extend its life
and optimize its performance.
Before cleaning
1. Cover the muffler outlet with a
plastic bag after the engine has
cooled down.
2. Make sure that all caps and covers
as well as all electrical couplers
and connectors, including the
spark plug cap, are tightly in-
stalled.
3. Remove extremely stubborn dirt,
like oil burnt onto the crankcase,
with a degreasing agent and abrush, but never apply such prod-
ucts onto seals, gaskets, sprock-
ets, the drive chain and wheel
axles. Always rinse the dirt and de-
greaser off with water.
Cleaning
CAUTION:

ECA10770

Avoid using strong acidic wheel
cleaners, especially on spoked
wheels. If such products are
used on hard-to-remove dirt, do
not leave the cleaner on the af-
fected area any longer than in-
structed. Also, thoroughly rinse
the area off with water, immedi-
ately dry it, and then apply a cor-
rosion protection spray.

Improper cleaning can damage
windshields, cowlings, panels
and other plastic parts. Use only
a soft, clean cloth or sponge
with mild detergent and water to
clean plastic.

Do not use any harsh chemical
products on plastic parts. Be
sure to avoid using cloths orsponges which have been in
contact with strong or abrasive
cleaning products, solvent or
thinner, fuel (gasoline), rust re-
movers or inhibitors, brake flu-
id, antifreeze or electrolyte.

Do not use high-pressure wash-
ers or steam-jet cleaners since
they cause water seepage and
deterioration in the following ar-
eas: seals (of wheel and swing-
arm bearings, fork and brakes),
electric components (couplers,
connectors, instruments,
switches and lights), breather
hoses and vents.

For motorcycles equipped with
a windshield: Do not use strong
cleaners or hard sponges as
they will cause dulling or
scratching. Some cleaning com-
pounds for plastic may leave
scratches on the windshield.
Test the product on a small hid-
den part of the windshield to
make sure that it does not leave

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9any marks. If the windshield is
scratched, use a quality plastic
polishing compound after

washing.
After normal use
Remove dirt with warm water, a mild
detergent, and a soft, clean sponge,
and then rinse thoroughly with clean
water. Use a toothbrush or bottlebrush
for hard-to-reach areas. Stubborn dirt
and insects will come off more easily if
the area is covered with a wet cloth for
a few minutes before cleaning.
After riding in the rain, near the sea oron salt-sprayed roadsSince sea salt or salt sprayed on roads
during winter are extremely corrosive in
combination with water, carry out the
following steps after each ride in the
rain, near the sea or on salt-sprayed
roads.NOTE:

Salt sprayed on roads in the winter may
remain well into spring.
1. Clean the motorcycle with cold wa-ter and a mild detergent, after the
engine has cooled down.
CAUTION:

ECA10790
Do not use warm water since it in-
creases the corrosive action of the
salt.
2. Apply a corrosion protection spray
on all metal, including chrome- and
nickel-plated, surfaces to prevent
corrosion.
After cleaning
1. Dry the motorcycle with a chamois
or an absorbing cloth.
2. Immediately dry the drive chain
and lubricate it to prevent it from
rusting.
3. Use a chrome polish to shine
chrome, aluminum and stain-
less-steel parts, including the ex-
haust system. (Even the thermally
induced discoloring of stain-
less-steel exhaust systems can be
removed through polishing.)
4. To prevent corrosion, it is recom-
mended to apply a corrosion pro-tection spray on all metal,
including chrome- and nickel-plat-
ed, surfaces.
5. Use spray oil as a universal clean-
er to remove any remaining dirt.
6. Touch up minor paint damage
caused by stones, etc.
7. Wax all painted surfaces.
8. Let the motorcycle dry completely
before storing or covering it.
WARNING

EWA10930

Make sure that there is no oil or
wax on the brakes or tires. If
necessary, clean the brake
discs and brake linings with a
regular brake disc cleaner or ac-
etone, and wash the tires with
warm water and a mild deter-
gent.

Before operating the motorcy-
cle test its braking performance
and cornering behavior.
CAUTION:

ECA10800

Apply spray oil and wax spar-

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9 ingly and make sure to wipe off
any excess.


Never apply oil or wax to any
rubber and plastic parts, but
treat them with a suitable care
product.

Avoid using abrasive polishing
compounds as they will wear
away the paint.
NOTE:

Consult a Yamaha dealer for advice on
what products to use.
EAU26150
Storage
Short-term
Always store your motorcycle in a cool,
dry place and, if necessary, protect it
against dust with a porous cover.
CAUTION:

ECA10810

Storing the motorcycle in a
poorly ventilated room or cover-
ing it with a tarp, while it is still
wet, will allow water and humid-
ity to seep in and cause rust.

To prevent corrosion, avoid
damp cellars, stables (because
of the presence of ammonia)
and areas where strong chemi-
cals are stored.
Long-term
Before storing your motorcycle for sev-
eral months:
1. Follow all the instructions in the
“Care” section of this chapter.
2. For motorcycles equipped with a
fuel cock that has an “OFF” posi-
tion: Turn the fuel cock lever to
“OFF”.3. Drain the carburetor float chamber
by loosening the drain bolt; this will
prevent fuel deposits from building
up. Pour the drained fuel into the
fuel tank.
4. Fill up the fuel tank and add fuel
stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating.
5. Perform the following steps to pro-
tect the cylinder, piston rings, etc.
from corrosion.
a. Remove the spark plug cap
and spark plug.
b. Pour a teaspoonful of engine oil
into the spark plug bore.
c. Install the spark plug cap onto
the spark plug, and then place
the spark plug on the cylinder
head so that the electrodes are
grounded. (This will limit spark-
ing during the next step.)
d. Turn the engine over several
times with the starter. (This will
coat the cylinder wall with oil.)
e. Remove the spark plug cap

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