2000 YAMAHA CYGNUS 125 oil change

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INSTRUMENT AND CONTROL FUNCTIONS
EAU10980
Indicator lightsZAUM00**
12
ZAUM00**
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1. High beam indicator light ”&”
2. Turn signal indicator light “5”
EAU11020
Turn signal indicator light “
5 55 5
5”
This indicator light flashes when the turn
signal switch is pushed to the left or right.
EAU11080
High beam indicator light “
& && &
&”
This indicator light comes on when the
high beam of the headlight is switched
on.
EAUT1370
Oil change indicator
This indicator changes from green to red
every 3000 km (1800 mi) to indicate that
the engine oil should be changed.After changing the engine oil, reset the
oil change indicator switch by pushing
it in.
ZAUM00**
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1. Oil change indicator
2. Reset switchIf the engine oil is changed before the
3000 km (1800 mi) interval, the indica-
tor must be reset after the oil change
for the next periodic oil change to be
indicated at the correct time.NOTE:
After resetting the oil change indicator
switch, the indicator changes from red
to green.
ECA10280
cCAfter 1000 km (600 mi) of operation,
the engine oil must be changed.
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OPERATION AND IMPORTANT RIDING POINTS
EAU16830
Engine break-inThere is never a more important period
in the life of your engine than the period
between 0 and 1000 km (600 mi). For
this reason, you should read the follow-
ing material carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1000 km (600 mi). The various parts in
the engine wear and polish themselves
to the correct operating clearances. Dur-
ing this period, prolonged full-throttle
operation or any condition that might
result in engine overheating must be
avoided.
EAU16820
Tips for reducing fuel con-
sumptionFuel consumption depends largely on
your riding style. Consider the following
tips to reduce fuel consumption:
8Avoid high engine speeds during
acceleration.
8Avoid high engine speeds with no
load on the engine.
8Turn 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).
EAU16950
0~150 km (0~90 mi)
Avoid prolonged operation above 1/3
throttle.
After every hour of operation, stop the
engine, and then let it cool for five to
ten minutes.
Vary the engine speed from time to time.
Do not operate the engine at one set
throttle position.150~500 km (90~300 mi)
Avoid prolonged operation above 1/2
throttle.
Rev the engine freely through the gears,
but do not use full throttle at any time.
500~1000 km (300~600 mi)
Avoid prolonged operation above 3/4
throttle.
ECA10350
cCAfter 1000 km (600 mi) of operation,
the engine oil must be changed and
the oil strainer cleaned.1000 km (600 mi) and beyond
Avoid prolonged full-throttle operation.
Vary the speed occasionally.
ECA10270
cCIf any engine trouble should occur
during the engine break-in period,
immediately have a Yamaha dealer
check the vehicle.
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PERIODIC MAINTENANCE AND MINOR REPAIR9
*Wheels Check runout and for damage.————
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*Steering bearings Check bearing play and steering for roughness.—————
 Lubricate with lithium-soap-based grease. Every 24000 km
13*Chassis fasteners Make sure that all nuts, bolts and screws are properly tightened.———— —
14 Sidestand, centerstand Check operation.
 Lubricate.———— —
15*Sidestand switch Check operation.————— —
16*Front fork Check operation and for oil leakage.————
17*Shock absorber
assembly Check operation and shock absorber for oil leakage.————
18*Carburetor Adjust engine idling speed.————— —
19*Engine oil Change. (see page 3-2)—Every 3000 km
 Check oil level and vehicle for oil leakage. Every 3000 km—
20*Engine oil strainer Clean.—
21 Final transmission oil Check vehicle for oil leakage.—— —
 Change.———
22*V-belt Replace. Every 18000 km
23*Front and rear brake
switches Check operation.————— — NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (u1,000 km)
ANNUAL
CHECK
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PERIODIC MAINTENANCE AND MINOR REPAIRZAUM00**
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1. Spark plug gap
Spark plug gap:
0.6~0.7 mm (0.024~0.028 in)
2. Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
3. Install the spark plug with the spark
plug wrench, and then tighten it to
the specified torque.
Tightening torque:
Spark plug:
13 Nm (1.3m  kgf, 9.4ft  lbf)
NOTE:
If a torque wrench is not available when
installing a spark plug, a good estimate
of the correct torque is 1/4~1/2 turn past
finger tight. However, the spark plug
should be tightened to the specified
torque as soon as possible.4. Install the spark plug cap.
5. Install the panel.
EAUT1350
Engine oil and oil strainerThe engine oil level should be checked
before each ride. In addition, the oil must
be changed and the oil strainer cleaned
at the intervals specified in the periodic
maintenance and lubrication chart. The
engine oil must also be changed at the
initial 1000 km (600 mi) and when the
oil change indicator changes from green
to red. The oil change indicator must be
reset after the initial 1000 km (600 mi).
(See page 3-2 for reset procedures.)
To check the engine oil level
1.Place the vehicle on the centerstand.NOTE:
Make sure that the vehicle is positioned
straight up when checking the oil level.
A slight tilt to the side can result in a
false reading.2. Start the engine, warm it up for sev-
eral minutes, and then turn it off.
3. Wait a few minutes until the oil
settles, remove the oil filler cap,
wipe the dipstick clean, inser t it
back into the oil filler hole (without
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PERIODIC MAINTENANCE AND MINOR REPAIR
screwing it in), and then remove it
again to check the oil level.
NOTE:
The engine oil should be between the
minimum and maximum level marks.ZAUM00**
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1. Maximum level mark
1. Minimum level mark4. If the engine oil is below the mini-
mum level mark, add sufficient oil
of the recommended type to raise
it to the correct level.
5. Insert the dipstick into the oil filler
hole, and then tighten the oil filler
cap.To change the engine oil and clean
the oil strainer
1. Start the engine, warm it up for sev-
eral minutes, and then turn it off.
2. Place an oil pan under the engine
to collect the used oil.
3. Remove the engine oil filler cap and
drain bolts to drain the oil from the
crankcase.
ECA10410
cCWhen removing the engine oil drain
bolt, the O-ring, spring, and oil
strainer will fall out. Take care not to
lose these parts.ZAUM00**
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1. Oil filler cap
ZAUM00**
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1. Engine oil drain bolt AZAUM00**
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1. Engine oil drain bolt B4. Clean the oil strainer with solvent,
and then check it for damage and
replace it if necessary.
5. Check the O-ring for damage and
replace it if necessary.
6. Install the oil strainer, spring, O-ring
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PERIODIC MAINTENANCE AND MINOR REPAIR
and engine oil drain bolts, and then
tighten the drain bolts to the speci-
fied torque.
Tightening torque:
Engine oil drain bolt A:
20 Nm (2.0 m  kgf, 14.5ft  lbf)
Engine oil drain bolt B:
20 Nm (2.0 m  kgf, 14.5 ft  lbf)
NOTE:
Make sure that the O-ring is properly
seated.7. Add the specified amount of the
recommended engine oil, and then
install and tighten the engine oil filler
cap.
Recommended engine oil:
See page 8-1.
Oil change quantity:
0.9 L (0.98 US qt) (0.83 Imp.qt)
ECA11670
cC8 88 8
8Do not use oils with a diesel
specification of “CD” or oils of a
higher quality than specified. Inaddition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.
8 88 8
8Be sure no foreign material en-
ters the crankcase.
8. 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.
9. Turn the engine off, and then check
the oil level and correct it if neces-
sary.
10. Reset the oil change indicator. (See
page 3-2 for reset procedures.)NOTE:
If the engine oil is changed before the
oil change indicator changes to red (i.e.
before the periodic oil change interval
has been reached), the indicator must
be reset after the oil change for the next
periodic oil change to be indicated at the
correct time.
EAU20060
Final transmission oilThe final transmission case must be
checked for oil leakage before each ride.
If any leakage is found, have a Yamaha
dealer check and repair the scooter. In
addition, the final transmission oil must
be changed as follows at the intervals
specified in the periodic maintenance
and lubrication chart.
1. Start the engine, warm it up by
riding the scooter for several min-
utes, and then stop the engine.
2. Place the scooter on the
centerstand.
3. Place an oil pan under the final
transmission case to collect the
used oil.
4. Remove the oil filler cap and drain
bolt to drain the oil from the final
transmission case.
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PERIODIC MAINTENANCE AND MINOR REPAIR8As the brake pads wear, it is nor-
mal for the brake fluid level to
gradually go down. However, if the
brake fluid level goes down sud-
denly, have a Yamaha dealer check
the cause.
EAU22720
Changing the brake fluidHave a Yamaha dealer change the brake
fluid at the intervals specified in the
NOTE after the periodic maintenance
and lubrication chart. In addition, have
the oil seals of the brake master cylin-
der and caliper as well as the brake hose
replaced at the intervals listed below or
whenever they are damaged or leaking.
8Oil seals: Replace every two years.
8Brake hose: Replace every four
years.
EAU23100
Checking and lubricating the
cablesThe operation of all control cables and
the condition of the cables should be
checked before each ride, and the
cables and cable ends should be lubri-
cated if necessary. If a cable is dam-
aged or does not move smoothly, have
a Yamaha dealer check or replace it.
Recommended lubricant:
Engine oil
EWA10720
wDamage to the outer sheath may in-
terfere with proper cable operation
and will cause the inner cable to rust.
Replace a damaged cable as soon as
possible to prevent unsafe condi-
tions.
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SPECIFICATIONS
-20˚ -10˚ 0˚ 10˚ 20˚ 30˚ 40˚ 50˚
SAE 10W-30SAE 10W-40
SAE 20W-40SAE 20W-50
ZAUM00**
EAU26320
SPECIFICATIONS
EAU26335
DimensionsOverall length
1855 mm
Overall width
685 mm
Overall height
1110 mm
Seat height
770 mm
Wheelbase
1295 mm
Ground clearance
110 mm
Minimum turning radius
1900 mmWeightWith oil and fuel
121.0 kgEngineEngine type
Forced air cooled 4-stroke, SOHC
Cylinder arrangement
Forward-inclined single cylinder
Displacement
124.0 cm
3
Bore & stroke
52.4 x 57.9 mm
Compression ratio
10.00 :1
Starting system
Electric starter and kickstarter
Lubrication system
Wet sump
Engine oilType
SAE20W40
Recommended engine oil grade
API service SE, SF, SG type or higher
Engine oil quantity
Periodic oil change
0.90 L
Without oil filter element removal
0.90 LFinal transmission oilType
SAE10W30 type SE motor oil
Quantity
0.13 LAir filterAir filter element
Oil-coated paper elementFuelRecommended fuel
Regular unleaded gasoline only
Fuel tank capacity
7.1 L
CarburetorManufacturer
Taiwan KEI HIN
Type x quantity
CVK24 x 1Spark plug(s)Manufacturer/model
NGK / CR7E
Spark plug gap
0.6-0.7 mmClutchClutch type
Dry, centrifugal automaticTransmissionPrimary reduction system
Helical gear
Primary reduction ratio
38/13 (2.923)
Secondary reduction system
Helical gear
Secondary reduction ratio
40 / 12 (3.333)
Transmission type
V-belt automatic
Operation
Centrifugal automatic typeChassisFrame type
Steel tube underbone
Caster angle
27.00 degree
Trail
90.0 mm
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