YAMAHA TW125 2004 Owner's Manual

INSTRUMENT AND CONTROL FUNCTIONS
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EAU13600
Starter (choke) knob “”
Starting a cold engine requires a richer
air-fuel mixture, which is supplied by
the starter (choke).
Move the knob in direction (a) to turn on
the starter (choke).
Move the knob in direction (b) to turn off
the starter (choke).
EAU13770
Steering lock
To lock the steering
1. Turn the handlebar all the way to
the right.
2. Open the steering lock cover, and
then insert the steering lock key.
3. Turn the key 1/8 turn counterclock-
wise, push it in while turning the
handlebar slightly to the left, and
then turn the key 1/8 turn clock-
wise.
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.

1. Starter (choke) knob “”
1
(a)
(b)

1. Steering lock cover
2. Steering lock
21

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INSTRUMENT AND CONTROL FUNCTIONS
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EAU13970
Seat
To remove the seat
Remove the bolts, and then pull the
seat off.
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 posi-
tion, and then tighten the bolts.
NOTE:

Make sure that the seat is properly se-
cured before riding.
EAU14281
Helmet holder
To open the helmet holder, insert the
key into the lock, and then turn the key
as shown.
To lock the helmet holder, place it in the
original position, and then remove the
key.
WARNING

EWA10160
Never ride with a helmet attached to
the helmet holder, since the helmet
may hit objects, causing loss of con-
trol and possibly an accident.
1. Bolt
1

1. Projection
2. Seat holder
1
2

1. Helmet holder
1

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INSTRUMENT AND CONTROL FUNCTIONS
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EAU15090
Shock absorber
WARNING

EWA10220
This shock absorber contains highly
pressurized nitrogen gas. For prop-
er handling, read and understand
the following information before
handling the shock absorber. The
manufacturer cannot be held re-
sponsible for property damage or
personal injury that may result from
improper handling.

Do not tamper with or attempt to
open the gas cylinder.

Do not subject the shock ab-
sorber to an open flame or other
high heat sources, otherwise it
may explode due to excessive
gas pressure.

Do not deform or damage the
gas cylinder in any way, as this
will result in poor damping per-
formance.

Always have a Yamaha dealer
service the shock absorber.
EAU15110
Carrier
WARNING

EWA10170


Do not exceed the load limit of
3 kg (6.6 lb) for the carrier.


Do not exceed the maximum
load of 180 kg (397 lb) for the ve-
hicle.
EAU15170
Luggage strap holders
There are four luggage strap holders
below the carrier.
1. Carrier
1

1. Luggage strap holder
1(×2)
1(×2)

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INSTRUMENT AND CONTROL FUNCTIONS
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EAU15300
Sidestand
The sidestand is located on the left side
of the frame. Raise the sidestand or
lower it with your foot while holding the
vehicle upright.
NOTE:

The built-in sidestand switch is part of
the ignition circuit cut-off system, which
cuts the ignition in certain situations.
(See further down for an explanation of
the ignition circuit cut-off system.)
WARNING

EWA10240
The vehicle must not be ridden with
the sidestand down, or if the side-
stand cannot be properly moved up
(or does not stay up), otherwise the
sidestand could contact the ground
and distract the operator, resulting
in a possible loss of control.
Yamaha’s ignition circuit cut-off
system has been designed to assist
the operator in fulfilling the respon-
sibility of raising the sidestand be-
fore starting off. Therefore, checkthis system regularly as described
below and have a Yamaha dealer re-
pair it if it does not function proper-
ly.
EAU15311
Ignition circuit cut-off system
The ignition circuit cut-off system (com-
prising the sidestand switch, clutch
switch and neutral switch) has the fol-
lowing functions.

It prevents starting when the trans-
mission is in gear and the side-
stand is up, but the clutch lever is
not pulled.

It prevents starting when the trans-
mission is in gear and the clutch le-
ver is pulled, but the sidestand is
still down.

It cuts the running engine when the
transmission is in gear and the sid-
estand is moved down.
Periodically check the operation of the
ignition circuit cut-off system according
to the following procedure.
WARNING

EWA10250
If a malfunction is noted, have a
Yamaha dealer check the system be-
fore riding.

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INSTRUMENT AND CONTROL FUNCTIONS
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With the engine turned off:
1. Move the sidestand down.
2. Make sure that the engine stop switch is turned on.
3. Turn the key on.
4. Shift the transmission into the neutral position.
5. Push the start switch.
Does the engine start?
With the engine still running:
6. Move the sidestand up.
7. Keep the clutch lever pulled.
8. Shift the transmission into gear.
9. Move the sidestand down.
Does the engine stall?
After the engine has stalled:
10. Move the sidestand up.
11. Keep the clutch lever pulled.
12. Push the start switch.
Does the engine start?
The system is OK. The motorcycle can be ridden.
This check is most reliable if performed with
a warmed-up engine.The neutral switch may be defective.
The motorcycle should not be ridden until
checked by a Yamaha dealer.
The sidestand switch may be defective.
The motorcycle should not be ridden until
checked by a Yamaha dealer.
The clutch switch may be defective.
The motorcycle should not be ridden until
checked by a Yamaha dealer.
YES NO YES NO YES NONOTE:

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PRE-OPERATION CHECKS
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EAU15591
The condition of a vehicle is the owner’s responsibility. Vital components can start to deteriorate quickly and unexpectedly,
even if the vehicle remains unused (for example, as a result of exposure to the elements). Any damage, fluid leakage or loss
of tire air pressure could have serious consequences. Therefore, it is very important, in addition to a thorough visual inspec-
tion, to check the following points before each ride.
NOTE:

Pre-operation checks should be made each time the vehicle is used. Such an inspection can be accomplished in a very short
time; and the added safety it assures is more than worth the time involved.
WARNING

EWA11150
If any item in the Pre-operation check list is not working properly, have it inspected and repaired before operating
the vehicle.

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PRE-OPERATION CHECKS
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EAU15602
Pre-operation check list
ITEM CHECKS PAGE
Fuel

Check fuel level in fuel tank.

Refuel if necessary.

Check fuel line for leakage.3-6
Engine oil

Check oil level in engine.

If necessary, add recommended oil to specified level.

Check vehicle for oil leakage.6-7
Front brake

Check operation.

If soft or spongy, have Yamaha dealer bleed hydraulic system.

Check lever free play.

Adjust if necessary.

Check brake pads for wear.

Replace if necessary.

Check fluid level in reservoir.

If necessary, add recommended brake fluid to specified level.

Check hydraulic system for leakage.6-17, 6-19, 6-20
Rear brake

Check operation.

Check pedal free play.

Adjust if necessary.6-18, 6-19
Clutch

Check operation.

Lubricate cable if necessary.

Check lever free play.

Adjust if necessary.6-16
Throttle grip

Make sure that operation is smooth.

Check cable free play.

If necessary, have Yamaha dealer adjust cable free play and lubricate cable
and grip housing.6-13, 6-24
Control cables

Make sure that operation is smooth.

Lubricate if necessary.6-23

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PRE-OPERATION CHECKS
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Drive chain

Check chain slack.

Adjust if necessary.

Check chain condition.

Lubricate if necessary.6-21, 6-23
Wheels and tires

Check for damage.

Check tire condition and tread depth.

Check air pressure.

Correct if necessary.6-13, 6-16
Brake and shift pedals

Make sure that operation is smooth.

Lubricate pedal pivoting points if necessary.6-24
Brake and clutch levers

Make sure that operation is smooth.

Lubricate lever pivoting points if necessary.6-24
Sidestand

Make sure that operation is smooth.

Lubricate pivot if necessary.6-25
Chassis fasteners

Make sure that all nuts, bolts and screws are properly tightened.

Tighten if necessary.—
Instruments, lights, signals
and switches

Check operation.

Correct if necessary.—
Sidestand switch

Check operation of ignition circuit cut-off system.

If system is defective, have Yamaha dealer check vehicle.3-11
ITEM CHECKS PAGE

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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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OPERATION AND IMPORTANT RIDING POINTS
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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.
EAU16640
Starting a warm engine
Follow the same procedure as for start-
ing a cold engine with the exception
that the starter (choke) is not required
when the engine is warm.
EAU16671
Shifting
Shifting gears lets you control the
amount of engine power available for
starting off, accelerating, climbing hills,
etc.
The gear positions are shown in the il-
lustration.
NOTE:

To shift the transmission into the neu-
tral position, press the shift pedal down
repeatedly until it reaches the end of its
travel, and then slightly raise it.
1. Shift pedal
2. Neutral position
1
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