2004 YAMAHA TW125 clutch
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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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Page 31 of 80
OPERATION AND IMPORTANT RIDING POINTS
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CAUTION:
ECA10260
Even with the transmission in
the neutral position, do not
coast for long periods of time
with the engine off, and do not
tow the motorcycle for long dis-
tances. The transmission is
properly lubricated only when
the engine is running. Inade-
quate lubrication may damage
the transmission.
Always use the clutch while
changing gears to avoid damag-
ing the engine, transmission,
and drive train, which are not
designed to withstand the
shock of forced shifting.
EAU32810
Recommended shift points (for
Switzerland only)
The recommended shift points during
acceleration are shown in the table be-
low.
NOTE:
When shifting down two gears at a
time, reduce the speed accordingly
[e.g., down to 35 km/h (22 mi/h) when
shifting from 4th to 2nd gear].
EAU16800
Tips for reducing fuel
consumption
Fuel consumption depends largely on
your riding style. Consider the following
tips to reduce fuel consumption:
Turn the starter (choke) off as
soon as possible.
Shift up swiftly, and avoid high en-
gine speeds during acceleration.
Do not rev the engine while shifting
down, and avoid high engine
speeds with no load on the engine.
Turn the engine off instead of let-
ting it idle for an extended length of
time (e.g., in traffic jams, at traffic
lights or at railroad crossings).
Shift up points:
1st
→
2nd: 23 km/h (14 mi/h)
2nd
→
3rd: 36 km/h (22 mi/h)
3rd
→
4th: 50 km/h (31 mi/h)
4th
→
5th: 60 km/h (37 mi/h)
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Page 34 of 80
PERIODIC MAINTENANCE AND MINOR REPAIR
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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 42 of 80
PERIODIC MAINTENANCE AND MINOR REPAIR
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11. Install the oil strainer, compression
spring, O-ring and engine oil drain
bolt, and then tighten the drain bolt
to the specified torque.
12. Add the specified amount of the
recommended engine oil, and then
install and tighten the oil filler cap.
CAUTION:
ECA11620
In order to prevent clutch slip-
page (since the engine oil also
lubricates the clutch), do not
mix any chemical additives. Donot use oils with a diesel speci-
fication of “CD” or oils of a high-
er quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.
Make sure that no foreign mate-
rial enters the crankcase.
13. Start the engine, and then let it idle
for several minutes while checking
it for oil leakage. If oil is leaking, im-
mediately turn the engine off and
check for the cause.
14. Turn the engine off, and then
check the oil level and correct it if
necessary.
EAU20830
Cleaning the air filter element
and check hose
The air filter element should be cleaned
at the intervals specified in the periodic
maintenance and lubrication chart.
Clean the air filter element more fre-
quently if you are riding in unusually
wet or dusty areas. In addition, the air
filter check hose must be frequently
checked and cleaned if necessary.
To clean the air filter element
1. Remove panel A. (See page 6-5.)
2. Remove the air filter case cover by
removing the screws.
3. Pull the air filter element out.
Tightening torque:
Engine oil drain bolt:
43 Nm (4.3 m·kgf, 31.1 ft·lbf)
Recommended engine oil:
See page 8-1.
Oil quantity:
Without oil filter element removal:
1.00 L (1.06 US qt)
(0.88 Imp.qt)
With oil filter element removal:
1.10 L (1.16 US qt)
(0.97 Imp.qt)
1. Air filter case cover
2. Screw
1
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2(×4)
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Page 48 of 80
PERIODIC MAINTENANCE AND MINOR REPAIR
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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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Page 49 of 80
PERIODIC MAINTENANCE AND MINOR REPAIR
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7. Tighten the locknut at the clutch le-
ver and the crankcase.
EAU22092
Adjusting the brake lever free
play
The brake lever free play should mea-
sure 5.0–8.0 mm (0.20–0.31 in) as
shown. Periodically check the brake le-
ver free play and, if necessary, adjust it
as follows.
1. Loosen the locknut at the brake le-
ver.
2. To increase the brake lever free
play, turn the adjusting screw in di-
rection (a). To decrease the brake
lever free play, turn the adjusting
screw in direction (b).3. Tighten the locknut.
WARNING
EWA10630
After adjusting the brake lever
free play, check the free play
and make sure that the brake is
working properly.
A soft or spongy feeling in the
brake lever can indicate the
presence of air in the hydraulic
system. If there is air in the hy-
draulic system, have a Yamaha
dealer bleed the system before
operating the motorcycle. Air in
the hydraulic system will dimin-
ish the braking performance,
which may result in loss of con-
trol and an accident.
1. Locknut
2. Brake lever free play adjusting screw
3. Brake lever free play
12
3
(b)
(a)
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PERIODIC MAINTENANCE AND MINOR REPAIR
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EAU23110
Checking and lubricating the
throttle grip and cable
The operation of the throttle grip should
be checked before each ride. In addi-
tion, the cable should be lubricated or
replaced at the intervals specified in the
periodic maintenance chart.
EAU23131
Checking and lubricating the
brake and shift pedals
The operation of the brake and shift
pedals should be checked before each
ride, and the pedal pivots should be lu-
bricated if necessary.
EAU23140
Checking and lubricating the
brake and clutch levers
The operation of the brake and clutch
levers should be checked before each
ride, and the lever pivots should be lu-
bricated if necessary.
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
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Page 74 of 80
SPECIFICATIONS
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EAU26333
Dimensions:
Overall length:
2135 mm (84.1 in)
Overall width:
820 mm (32.3 in)
Overall height:
1120 mm (44.1 in)
Seat height:
820 mm (32.3 in)
Wheelbase:
1350 mm (53.1 in)
Ground clearance:
255 mm (10.04 in)
Minimum turning radius:
2100 mm (82.7 in)
Weight:
With oil and fuel:
127.0 kg (280 lb)
Engine:
Engine type:
Air cooled 4-stroke, SOHC
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
125.0 cm
3
(7.63 cu.in)
Bore
×
stroke:
57.0
×
48.8 mm (2.24
×
1.92 in)
Compression ratio:
10.00 :1
Starting system:
Electric starter
Lubrication system:
Wet sump
Engine oil:
Type:
SAE10W30 or SAE10W40 or SAE15W40
or SAE20W40 or SAE20W50
Recommended engine oil grade:
API service SE, SF, SG type or higher
Engine oil quantity:
Without oil filter element removal:
1.00 L (1.06 US qt) (0.88 Imp.qt)
With oil filter element removal:
1.10 L (1.16 US qt) (0.97 Imp.qt)
Air filter:
Air filter element:
Wet element
Fuel:
Recommended fuel:
Regular unleaded gasoline only
Fuel tank capacity:
7.0 L (1.85 US gal) (1.54 Imp.gal)
Fuel reserve amount:
1.7 L (0.45 US gal) (0.37 Imp.gal)
Carburetor:
Manufacturer:
TEIKEI
Type x quantity:
MV28 x 1
Spark plug(s):
Manufacturer/model:
NGK/DR8EA
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Clutch:
Clutch type:
Wet, multiple-disc
Transmission:
Primary reduction system:
Spur gear
Primary reduction ratio:
74/20 (3.700)
Secondary reduction system:
Chain drive
Secondary reduction ratio:
51/14 (3.643)
Transmission type:
Constant mesh 5-speed
Operation:
Left foot operation
Gear ratio:
1st:
36/16 (2.250)
2nd:
31/21 (1.476)
3rd:
27/24 (1.125)
-20 -10 0
10 20 30
40
50 ˚C
SAE 10W-30
SAE 15W-40SAE 20W-40SAE 20W-50
SAE 10W-40
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