2002 YAMAHA TW125 clutch

EAU00009
TABLE OF CONTENTS
GIVE SAFETY THE RIGHT OF WAY ............... 1-1
DESCRIPTION ................................................. 2-1
Left view ......................................................... 2-1
Right view ...................................................... 2-2
Controls and instruments ............................... 2-3
INSTRUMENT AND CONTROL FUNCTIONS . 3-1
Main switch .................................................... 3-1
Indicator lights ................................................ 3-1
Speedometer unit .......................................... 3-2
Handlebar switches ........................................ 3-2
Clutch lever .................................................... 3-4
Shift pedal ...................................................... 3-4
Brake lever ..................................................... 3-4
Brake pedal .................................................... 3-5
Fuel tank cap ................................................. 3-5
Fuel ................................................................ 3-6
Fuel cock ........................................................ 3-7
Starter (choke) knob ...................................... 3-8
Steering lock .................................................. 3-8
Seat ................................................................ 3-9
Helmet holder ................................................. 3-9
Shock absorber ............................................ 3-10
Carrier .......................................................... 3-10
Luggage strap holders ................................. 3-10
Sidestand ..................................................... 3-11Ignition circuit cut-off system ........................ 3-11
PRE-OPERATION CHECKS ............................ 4-1
Pre-operation check list ................................. 4-1
OPERATION AND IMPORTANT RIDING
POINTS ............................................................. 5-1
Starting the engine ......................................... 5-1
Starting a warm engine .................................. 5-2
Shifting ........................................................... 5-3
Recommended shift points
(for Switzerland only) .................................. 5-3
Tips for reducing fuel consumption ................ 5-4
Engine break-in .............................................. 5-4
Parking ........................................................... 5-5
PERIODIC MAINTENANCE AND MINOR
REPAIR ............................................................. 6-1
Owner’s tool kit .............................................. 6-1
Periodic maintenance and lubrication chart ... 6-2
Removing and installing panels ..................... 6-5
Checking the spark plug ................................ 6-7
Engine oil and oil filter element ...................... 6-9
Cleaning the air filter element and check
hose .......................................................... 6-12
Adjusting the carburetor ............................... 6-14
Adjusting the engine idling speed ................ 6-14
123
456
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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
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
789
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2-3
DESCRIPTION
2
Controls and instruments1. Clutch lever (page 3-4, 6-19)
2. Left handlebar switches (page 3-2)
3. Speedometer unit (page 3-2)
4. Starter (choke) knob (page 3-8)
5. Main switch (page 3-1)6. Indicator lights (page 3-1)
7. Right handlebar switches (page 3-3)
8. Brake lever (page 3-4, 6-20)
9. Throttle grip (page 6-15, 6-28)
10. Fuel tank cap (page 3-5)
1
23
45
678
9
10
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3-4
EAU00152
Clutch leverThe clutch lever is located at the left
handlebar grip. To disengage the
clutch, pull the lever toward the han-
dlebar grip. To engage the clutch,
release the lever. The lever should
be pulled rapidly and released slowly
for smooth clutch operation.
The clutch lever is equipped with a
clutch switch, which is part of the igni-
tion circuit cut-off system. (See page
3-11 for an explanation of the ignition
circuit cut-off system.)INSTRUMENT AND CONTROL FUNCTIONS
3
1
1. Clutch lever
EAU00158
Brake leverThe brake lever is located at the right
handlebar grip. To apply the front
brake, pull the lever toward the han-
dlebar grip.
1
1. Brake lever
EAU00157
Shift pedalThe shift pedal is located on the left
side of the engine and is used in
combination with the clutch lever
when shifting the gears of the
5-speed constant-mesh transmission
equipped on this motorcycle.
1
1. Shift pedal
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3-11
INSTRUMENT AND CONTROL FUNCTIONS
3
EAU00330
SidestandThe sidestand is located on the left
side of the frame. Raise the side-
stand or lower it with your foot while
holding the motorcycle upright.NOTE:
The built-in sidestand switch is part of
the ignition circuit cut-off system,
which cuts the ignition in certain situ-
ations. (See further down for an
explanation of the ignition circuit cut-
off system.)
EAU03720
Ignition circuit cut-off
systemThe ignition circuit cut-off system
(comprising the sidestand switch,
clutch switch and neutral switch) has
the following functions.
8It prevents starting when the
transmission is in gear and the
sidestand is up, but the clutch
lever is not pulled.
8It prevents starting when the
transmission is in gear and the
clutch lever is pulled, but the
sidestand is still down.
8It cuts the running engine when
the transmission is in gear and
the sidestand is moved down.
Periodically check the operation of
the ignition circuit cut-off system
according to the following procedure.
EW000045
wIf a malfunction is noted, have a
Yamaha dealer check the system
before riding.
EW000044
wThe motorcycle must not be ridden
with the sidestand down, or if the
sidestand cannot be properly
moved up (or does not stay up),
otherwise the sidestand could con-
tact 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 responsibility of rais-
ing the sidestand before starting
off. Therefore, check this system
regularly as described below and
have a Yamaha dealer repair it if it
does not function properly.
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3-12
INSTRUMENT AND CONTROL FUNCTIONS
3
With the engine turned off:
1. Move the sidestand down.
2. Make sure that the engine stop switch is set to “
#”.
3. Turn the key to “ON”.
4. Shift the transmission into the neutral position.
5. Push the start switch.
Does the engine start?
The neutral switch may be defective.
The motorcycle should not be ridden until
checked by a Yamaha dealer.
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 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.
NO
NOTE:This check is most reliable if performed with
a warmed-up engine.
YESYES NO
The system is OK. The motorcycle can be ridden.
YES NO
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4-2
PRE-OPERATION CHECKS
4
Clutch•Check operation.
•Lubricate cable if necessary.
•Check lever free play.
•Adjust if necessary.3-4, 6-19–6-20
Throttle grip•Make sure that operation is smooth.
•Check free play.
•If necessary, have Yamaha dealer make adjustment or lubricate.6-15, 6-28
Control cables•Make sure that operation is smooth.
•Lubricate if necessary.6-27
Drive chain•Check chain slack.
•Adjust if necessary.
•Check chain condition.
•Lubricate if necessary.6-25–6-27
Wheels and tires•Check for damage.
•Check tire condition and tread depth.
•Check air pressure.
•Correct if necessary.6-16–6-19
Brake and shift pedals•Make sure that operation is smooth.
•Lubricate pedal pivoting points if necessary.6-28
Brake and clutch levers•Make sure that operation is smooth.
•Lubricate lever pivoting points if necessary.6-29
Sidestand•Make sure that operation is smooth.
•Lubricate pivot if necessary.6-29 ITEM CHECKS PAGE
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5-1
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OPERATION AND IMPORTANT RIDING POINTS
5
EAU00373
w8Become thoroughly familiar
with all operating controls and
their functions before riding.
Consult a Yamaha dealer
regarding any control or func-
tion that you do not thorough-
ly understand.
8Never 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.
8Before 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.
EAU03515
Starting the engineIn order for the ignition circuit cut-off
system to enable starting, one of the
following conditions must be met:
8The transmission is in the neutral
position.
8The transmission is in gear with
the clutch lever pulled and the
sidestand up.
EW000054
w8Before starting the engine,
check the function of the igni-
tion circuit cut-off system
according to the procedure
described on page 3-12.
8Never 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
neutral position.NOTE:
When the transmission is in the neu-
tral position, the neutral indicator light
should be on, otherwise have a
Yamaha dealer check the electrical
circuit.
ON
FUEL
RES
OFF
1
ON
1. Arrow mark positioned over “ON”
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