2001 YAMAHA TW125 clutch

5-3
OPERATION AND IMPORTANT RIDING POINTS
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EC000048
cC8Even 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
distances. The transmission is
properly lubricated only when
the engine is running.
Inadequate lubrication may
damage the transmission.
8Always use the clutch while
changing gears to avoid dam-
aging the engine, transmis-
sion, and drive train, which are
not designed to withstand the
shock of forced shifting.
1
N5
4
3
2
1
EAU00423
ShiftingShifting gears lets you control the
amount of engine power available for
starting off, accelerating, climbing
hills, etc.
The gear positions are shown in the
illustration.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
N. Neutral
EAU02941
Recommended shift points
(for Switzerland only)The recommended shift points during
acceleration are shown in the table
below.NOTE:
When shifting down two gears at a
time, reduce the speed accordingly
(e.g., down to 35 km/h when shifting
from 4th to 2nd gear).
Shift point (km/h)
1st ®2nd 23
2nd ®3rd 36
3rd ®4th 50
4th ®5th 60
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6-2
PERIODIC MAINTENANCE AND MINOR REPAIR
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EAU00473*
Periodic maintenance and lubrication chart
NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (´1,000 km)
ANNUAL
CHECK
1 6 12 18 24
1
*Fuel line¥ Check fuel hoses for cracks or damage.ÖÖÖÖ Ö
2 Spark plug¥ Check condition.
¥ Clean and regap.ÖÖ
¥ Replace.ÖÖ
3*Valves¥ Check valve clearance.
¥ Adjust.ÖÖÖÖ
4 Air filter element¥ Clean.ÖÖ
¥ Replace.ÖÖ
5*Battery¥ Check electrolyte level and specific gravity.
¥ Make sure that the breather hose is properly routed.ÖÖÖÖ Ö
6 Clutch¥ Check operation.
¥ Adjust.ÖÖÖÖÖ
7*Front brake¥ Check operation, fluid level and vehicle for fluid leakage.
(See NOTE on page 6-4.)ÖÖÖÖÖ Ö
¥ Replace brake pads.Whenever worn to the limit
8*Rear brake¥ Check operation and adjust brake pedal freeplay.ÖÖÖÖÖ Ö
¥ Replace brake shoes.Whenever worn to the limit
9*Brake hose¥ Check for cracks or damage.ÖÖÖÖ Ö
¥ Replace. (See NOTE on page 6-4.)Every 4 years
NOTE:
8The annual checks must be performed every year, except if kilometer-based maintenance is performed instead.
8From 30,000 km, repeat the maintenance intervals starting from 6,000 km.
8Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and
technical skills.
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6-12
PERIODIC MAINTENANCE AND MINOR REPAIR
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EAU03562
Cleaning the air filter
element and check hoseThe air filter element should be
cleaned at the intervals specified in
the periodic maintenance and lubrica-
tion chart. Clean the air filter element
more frequently if you are riding in
unusually wet or dusty areas. In addi-
tion, 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 6-6
for panel removal and installation
procedures.)
1. Air filter case cover
2. Screw (´4)
EC000072
cC8In order to prevent clutch slip-
page (since the engine oil also
lubricates the clutch), do not
mix any chemical additives
with the oil or use oils of a
higher grade than ÒCDÓ. In
addition, do not use oils
labeled ÒENERGY CONSERV-
ING
IIÓ or higher.
8Make sure that no foreign
material 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, immediately 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.2. Remove the air filter case cover
by removing the screws.
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6-19
PERIODIC MAINTENANCE AND MINOR REPAIR
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98Ride at moderate speeds after
changing a tire since the tire sur-
face must first be Òbroken inÓ for
it to develop its optimal charac-
teristics.3. If the specified clutch lever free
play could be obtained as
described 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 ato
loosen the clutch cable.
EAU03460
Adjusting the clutch lever
free playThe clutch lever free play should
measure 10Ð15 mm as shown.
Periodically check the clutch lever
free play and, if necessary, adjust it
as follows.
1. Loosen the locknut at the clutch
lever.
2. To increase the clutch lever free
play, turn the adjusting bolt in
direction a. To decrease the
clutch lever free play, turn the
adjusting bolt in direction b.1. Locknut
2. Adjusting bolt
c. Free playc1
2
ab
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6-20
PERIODIC MAINTENANCE AND MINOR REPAIR
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EAU00696
Adjusting the brake lever
free playThe brake lever free play should
measure 2Ð5 mm as shown.
Periodically check the brake lever
free play and, if necessary, adjust it
as follows.
1. Loosen the locknut at the brake
lever.
2. To increase the brake lever free
play, turn the adjusting bolt in
direction a. To decrease the
brake lever free play, turn the
adjusting bolt in direction b.
3. Tighten the locknut.1. Locknut
2. Adjusting bolt
c. Free play
12
c
a b
5. Loosen the locknuts at the
crankcase.
6. To increase the clutch lever free
play, turn the adjusting bolt in
direction a. To decrease the
clutch lever free play, turn the
adjusting bolt in direction b.
7. Tighten the locknuts at the clutch
lever and the crankcase.1. Locknut (´2)
2. Adjusting bolt
ab
2
1
EW000099
w8After adjusting the brake lever
free play, check the free play
and make sure that the brake
is working properly.
8A soft or spongy feeling in the
brake lever can indicate the
presence of air in the
hydraulic system. If there is air
in the hydraulic system, have
a Yamaha dealer bleed the
system before operating the
motorcycle. Air in the
hydraulic system will diminish
the braking performance,
which may result in loss of
control and an accident.
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6-29
PERIODIC MAINTENANCE AND MINOR REPAIR
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EAU03166
Lubricating the rear
suspensionThe pivoting points of the rear sus-
pension must be lubricated at the
intervals specified in the periodic
maintenance and lubrication chart.1. Grease nipple (´2)
1
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
EAU03165
Checking and lubricating the
sidestandThe operation of the sidestand
should be checked before each ride,
and the sidestand pivot and metal-to-
metal contact surfaces should be
lubricated if necessary.
EW000113
wIf the sidestand does not move up
and down smoothly, have a
Yamaha dealer check or repair it.
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
EAU03164
Checking and lubricating the
brake and clutch leversThe operation of the brake and clutch
levers should be checked before
each ride, and the lever pivots should
be lubricated if necessary.
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
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8-1
EAU01038
SPECIFICATIONS
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Specifications
Model TW125
Dimensions
Overall length 2,140 mm
Overall width 810 mm
Overall height 1,120 mm
Seat height 805 mm
Wheelbase 1,330 mm
Ground clearance 260 mm
Minimum turning radius 2,100 mm
Basic weight (with oil and full
fuel tank)125 kg
Engine
Engine type Air-cooled 4-stroke, SOHC
Cylinder arrangement Forward inclined
single cylinder
Displacement 124 cm
3
Bore ´Stroke 57.0 ´48.8 mm
Compression ratio 10:1
Starting system Electric starter
Lubrication system Wet sumpEngine oil
Type
Recommended engine oil
classification API Service SE, SF, SG type
or higher
cCBe sure to use motor oils that do not contain anti-friction
modifiers. Passenger car motor oils (often labeled ÒEnergy
ConservingÓ) contain anti-friction additives which will cause
clutch and/or starter clutch slippage, resulting in reduced
component life and poor engine performance.
Capacity
Without oil filter element
removal 1.0 L
With oil filter element removal 1.1 L
Total amount (dry engine) 1.3 L
Air filterWet type element
–10° 0° 10° 20° 30°
40°
SAE 10W/30
SAE 10W/40
SAE 20W/40
SAE 20W/50
–20°
SAE 15W/40 50°C
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8-2
SPECIFICATIONS
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Fuel
Type Regular unleaded gasoline
Fuel tank capacity 7.0 L
Reserve amount 1.0 L
Carburetor
Manufacturer TEIKEI
Model ´quantity Y24P ´1
Spark plug
Manufacturer/Type NGK/DR8EA
Gap 0.6Ð0.7 mm
Clutch typeWet, multiple-disc
Transmission
Primary reduction system Spur gear
Primary reduction ratio 74/20 (3.700)
Secondary reduction system Chain drive
Secondary reduction ratio 3.571
Number of drive chain
sprocket teeth (rear/front) 50/14
Transmission type Constant mesh 5-speed
Operation Left foot operationGear ratio 1st 2.250
2nd 1.476
3rd 1.125
4th 0.926
5th 0.793
Chassis
Frame type Diamond
Caster angle 26¡
Trail 95 mm
Tires
Type With tube
Front
Size 130/80-18 66P
Manufacturer/ BRIDGESTONE / TW31
model
Rear
Size 180/80-14M/C 78P
Manufacturer/ BRIDGESTONE / TW34
model
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