2004 YAMAHA TW125 wheel
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TABLE OF CONTENTS
SAFETY INFORMATION ............. 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 ................... 3-3
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 ............ 4-2
OPERATION AND IMPORTANT
RIDING POINTS ........................... 5-1
Starting a cold engine ............... 5-1
Starting a warm engine ............. 5-2
Shifting ...................................... 5-2
Tips for reducing fuel
consumption ............................ 5-3
Engine break-in ......................... 5-4
Parking ...................................... 5-4
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 ........... 6-6
Engine oil and oil filter
element ................................... 6-7
Cleaning the air filter element
and check hose ..................... 6-10
Adjusting the carburetor .......... 6-12Adjusting the engine idling
speed .................................... 6-12
Adjusting the throttle cable free
play ....................................... 6-13
Adjusting the valve
clearance .............................. 6-13
Tires ........................................ 6-13
Spoke wheels .......................... 6-16
Adjusting the clutch lever free
play ....................................... 6-16
Adjusting the brake lever free
play ....................................... 6-17
Adjusting the brake pedal
position and free play ............ 6-18
Adjusting the rear brake light
switch .................................... 6-19
Checking the front brake pads
and rear brake shoes ............ 6-19
Checking the brake fluid
level ....................................... 6-20
Changing the brake fluid ......... 6-21
Drive chain slack ..................... 6-21
Lubricating the drive chain ...... 6-23
Checking and lubricating the
cables .................................... 6-23
Checking and lubricating the
throttle grip and cable ........... 6-24
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Page 6 of 80
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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Page 8 of 80
SAFETY INFORMATION
1-2
1
undercornering (insufficient lean
angle for the speed).
Always obey the speed limit and
never travel faster than warrant-
ed by road and traffic conditions.
Always signal before turning or
changing lanes. Make sure that
other motorists can see you.
The posture of the operator and
passenger is important for proper
control.
The operator should keep both
hands on the handlebar and
both feet on the operator foot-
rests during operation to main-
tain control of the motorcycle.
The passenger should always
hold onto the operator, the seat
strap or grab bar, if equipped,
with both hands and keep both
feet on the passenger footrests.
Never carry a passenger unless
he or she can firmly place both
feet on the passenger footrests.
Never ride under the influence of
alcohol or other drugs.
Protective apparel
The majority of fatalities from motorcy-
cle accidents are the result of head in-
juries. The use of a safety helmet is the
single most critical factor in the preven-
tion or reduction of head injuries.
Always wear an approved helmet.
Wear a face shield or goggles.
Wind in your unprotected eyes
could contribute to an impairment
of vision that could delay seeing a
hazard.
The use of a jacket, heavy boots,
trousers, gloves, etc., is effective in
preventing or reducing abrasions
or lacerations.
Never wear loose-fitting clothes,
otherwise they could catch on the
control levers, footrests, or wheels
and cause injury or an accident.
Never touch the engine or exhaust
system during or after operation.
They become very hot and can
cause burns. Always wear protec-
tive clothing that covers your legs,
ankles, and feet.
Passengers should also observe
the precautions mentioned above.
Modifications
Modifications made to this motorcycle
not approved by Yamaha, or the re-
moval of original equipment, may ren-
der the motorcycle unsafe for use and
may cause severe personal injury.
Modifications may also make your mo-
torcycle illegal to use.
Loading and accessories
Adding accessories or cargo to your
motorcycle can adversely affect stabili-
ty and handling if the weight distribution
of the motorcycle is changed. To avoid
the possibility of an accident, use ex-
treme caution when adding cargo or
accessories to your motorcycle. Use
extra care when riding a motorcycle
that has added cargo or accessories.
Here are some general guidelines to
follow if loading cargo or adding acces-
sories to your motorcycle:
Loading
The total weight of the operator, pas-
senger, accessories and cargo must
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Page 28 of 80
PRE-OPERATION CHECKS
4-3
2
3
45
6
7
8
9
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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Page 34 of 80
PERIODIC MAINTENANCE AND MINOR REPAIR
6-2
2
3
4
5
67
8
9
EAU17710
Periodic maintenance and lubrication chart
NOTE:
The annual checks must be performed every year, except if a kilometer-based maintenance is performed in-
stead.
From 30000 km, repeat the maintenance intervals starting from 6000 km.
Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technical
skills.
NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (
×× × ×
1000 km)
ANNUAL
CHECK
1 6 12 18 24
1*
Fuel line
Check fuel hoses for cracks or damage.
√
√
√
√
√
2
Spark plug
Check condition.
Clean and regap.
√
√
Replace.
√
√
3*
Valves
Check valve clearance.
Adjust.
√
√
√
√
4
Air filter element
Clean.
√
√
Replace.
√
√
5
Clutch
Check operation.
Adjust.
√
√
√
√
√
6*
Front brake
Check operation, fluid level and vehicle for fluid leak-
age.
√
√
√
√
√
√
Replace brake pads. Whenever worn to the limit
7*
Rear brake
Check operation and adjust brake pedal free play.
√
√
√
√
√
√
Replace brake shoes. Whenever worn to the limit
8*
Brake hose
Check for cracks or damage.
√
√
√
√
√
Replace. Every 4 years
9*
Wheels
Check runout, spoke tightness and for damage.
Tighten spokes if necessary.
√
√
√
√
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Page 35 of 80
PERIODIC MAINTENANCE AND MINOR REPAIR
6-3
1
2
3
4
5
6
7
8
9
10
*
Tires
Check tread depth and for damage.
Replace if necessary.
Check air pressure.
Correct if necessary.
√
√
√
√
√
11
*
Wheel bearings
Check bearing for looseness or damage.
√
√
√
√
12
*
Swingarm
Check operation and for excessive play.
√
√
√
√
Lubricate with lithium-soap-based grease. Every 24000 km
13
Drive chain
Check chain slack.
Make sure that the rear wheel is properly aligned.
Clean and lubricate.Every 500 km and after washing the motorcycle or
riding in the rain
14
*
Steering bearings
Check bearing play and steering for roughness.
√
√
√
√
√
Lubricate with lithium-soap-based grease. Every 24000 km
15
*
Chassis fasteners
Make sure that all nuts, bolts and screws are properly
tightened.
√
√
√
√
√
16
Sidestand
Check operation.
Lubricate.
√
√
√
√
√
17
*
Sidestand switch
Check operation.
√
√
√
√
√
√
18
*
Front fork
Check operation and for oil leakage.
√
√
√
√
19
*
Shock absorber assem-
bly
Check operation and shock absorber for oil leakage.
√
√
√
√
20
*
Rear suspension relay
arm and connecting arm
pivoting points
Check operation.
√
√
√
√
Lubricate with lithium-soap-based grease.
√
√
21
*
Carburetor
Check starter (choke) operation.
Adjust engine idling speed.
√
√
√
√
√
√
22
Engine oil
Change.
Check oil level and vehicle for oil leakage.
√
√
√
√
√
√
23
Engine oil filter element
Clean.
√
√
√
24
*
Engine oil strainer
Clean.
√
NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (
×× × ×
1000 km)
ANNUAL
CHECK
1 6 12 18 24
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Page 47 of 80
PERIODIC MAINTENANCE AND MINOR REPAIR
6-15
1
2
3
4
5
6
7
8
9Tire information
This motorcycle is equipped with tube
tires.
WARNING
EWA10460
The front and rear tires should
be of the same make and de-
sign, otherwise the handling
characteristics of the vehicle
cannot be guaranteed.
After extensive tests, only the
tires listed below have been ap-
proved for this model by
Yamaha Motor Co., Ltd.
WARNING
EWA10570
Have a Yamaha dealer replace
excessively worn tires. Besides
being illegal, operating the mo-
torcycle with excessively worn
tires decreases riding stability
and can lead to loss of control.
The replacement of all wheel-
and brake-related parts, includ-
ing the tires, should be left to a
Yamaha dealer, who has the
necessary professional knowl-
edge and experience.
It is not recommended to patch
a punctured tube. If unavoid-able, however, patch the tube
very carefully and replace it as
soon as possible with a
high-quality product. Front tire:
Size:
130/80-18M/C 66P
Manufacturer/model:
BRIDGESTONE/TW-203
Rear tire:
Size:
180/80-14M/C 78P
Manufacturer/model:
BRIDGESTONE/TW-204
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Page 48 of 80
PERIODIC MAINTENANCE AND MINOR REPAIR
6-16
2
3
4
5
67
8
9
EAU21940
Spoke wheels
To maximize the performance, durabil-
ity, and safe operation of your motorcy-
cle, note the following points regarding
the specified wheels.
The wheel rims should be checked
for cracks, bends or warpage, and
the spokes for looseness or dam-
age before each ride. If any dam-
age is found, have a Yamaha
dealer replace the wheel. Do not
attempt even the smallest repair to
the wheel. A deformed or cracked
wheel must be replaced.
The wheel should be balanced
whenever either the tire or wheel
has been changed or replaced. An
unbalanced wheel can result in
poor performance, adverse han-
dling characteristics, and a short-
ened tire life.
Ride at moderate speeds after
changing a tire since the tire sur-
face must first be “broken in” for it
to develop its optimal characteris-
tics.
EAU22040
Adjusting the clutch lever free
play
The clutch lever free play should mea-
sure 10.0–15.0 mm (0.39–0.59 in) as
shown. Periodically check the clutch le-
ver free play and, if necessary, adjust it
as follows.
1. Loosen the locknut at the clutch le-
ver.
2. To increase the clutch lever free
play, turn the adjusting bolt in di-
rection (a). To decrease the clutch
lever free play, turn the adjusting
bolt in direction (b).3. If the specified clutch lever free
play could be obtained as de-
scribed above, tighten the locknut
and skip the rest of the procedure,
otherwise proceed as follows.
4. Fully turn the adjusting bolt at the
clutch lever in direction (a) to loos-
en the clutch cable.
5. Loosen the locknut at the crank-
case.
6. To increase the clutch lever free
play, turn the adjusting nut in direc-
tion (a). To decrease the clutch le-
ver free play, turn the adjusting nut
in direction (b).
1. Locknut (clutch lever)
2. Adjusting bolt
3. Clutch lever free play
1
2
3(a)
(b)
1. Locknut (crankcase)
2. Adjusting nut
(b)(a)
2
1
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