recommended oil YAMAHA CYGNUS 125 2012 Owners Manual

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EAU15582
FOR YOUR SAFETY - PRE-OPERATION CHECKSBefore using this vehicle, check the following points:
ITEM CHECKS PAGE
Fuel• Check fuel level in fuel tank.
• Refuel if necessary.
• Check fuel line for leakage.3-7
Engine oil• Check oil level in engine.
• If necessary, add recommended oil to specifi ed level.
• Check vehicle for oil leakage.6-10
Final transmission oil• Check vehicle for oil leakage. 6-12
Front brake• Check operation.
• If soft or spongy, have Yamaha dealer bleed hydraulic system.
• Check brake pads for wear.
• Replace if necessary.
• Check fl uid level in reservoir.
• If necessary, add recommended brake fl uid to specifi ed level.
• Check hydraulic system for leakage.6-18~6-20
Rear brake• Check operation.
• Lubricate cable if necessary.
• Check lever free play.
• Adjust if necessary.6-18, 6-19
Throttle grip• Make sure that operation is smooth.
• Check throttle grip free play.
• If necessary, have Yamaha dealer adjust throttle grip free play and lubricate
cable and grip housing.6-15, 6-21
Wheels and tires• Check for damage.
• Check tire condition and tread depth.
• Check air pressure.
• Correct if necessary.6-16, 6-17
Brake levers• Make sure that operation is smooth.
• Lubricate lever pivoting points if necessary.6-21
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6-10
EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
EAUT1352
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 speci-
fied 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 indi-
cator fl ashes. The oil change tripmeter
must be reset after the initial 1000 km
(600 mi). (See page 3-3 for reset pro-
cedures.)
To check the engine oil level
1. Place the vehicle on the center-
stand. A slight tilt to the side can
result in a false reading.
2. Start the engine, warm it up for
several minutes, and then turn it
off.
3. Wait a few minutes until the oil
settles, remove the oil filler cap,
wipe the dipstick clean, insert it
back into the oil fi ller hole (without
screwing it in), and then remove it
again to check the oil level.
TIPThe engine oil should be between the
minimum and maximum level marks.ZAUM00**
12
1. Maximum level mark
2. Minimum level mark4. If the engine oil is below the mini-
mum level mark, add suffi cient oil
of the recommended type to raise
it to the correct level.
5. Insert the dipstick into the oil fi ller
hole, and then tighten the oil fi ller
cap.
To change the engine oil and clean
the oil strainer
1. Start the engine, warm it up for
several 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.
NOTICE:

When removing the engine oil
drain bolt, the O-ring, spring,
and oil strainer will fall out.
Take care not to lose these
parts.
[ECA10411]
ZAUM00**
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1. Oil fi ller cap
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6-11
EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENTZAUM00**
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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 and engine oil drain bolts,
and then tighten the drain bolts to
the specifi ed torque.Tightening torque:
Engine oil drain bolt A:
20 Nm (2.0 m·kgf, 14.5 ft·lbf)
Engine oil drain bolt B:
20 Nm (2.0 m·kgf, 14.5 ft·lbf)TIPMake sure that the O-ring is properly
seated.
7. Refi ll with the specifi ed amount of
the recommended engine oil, and
then install and tighten the engine
oil fi ller cap.Recommended engine oil:
See page 8-1.
Oil change quantity:
0.9 L (0.95 US qt, 0.79 Imp.qt)
ECA11670
NOTICE● Do not use oils with a diesel
speci cation of “CD” or oils of
a higher quality than speci ed.
In addition, do not use oils la-
beled “ENERGY CONSERVING
II” or higher.
● Be 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 en-
gine off and check for the cause.
9. Turn the engine off, and then
check the oil level and correct it if
necessary.
10. Reset the oil change tripmeter.
(See page 3-3 for reset proce-
dures.)
TIPIf the engine oil is changed before
the oil change indicator flashes (i.e.
before the periodic oil change interval
has been reached), the oil change
tripmeter must be reset after the
oil change for the next periodic oil
change to be indicated at the correct
time.
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6-12
EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
EAU20065
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 fi nal transmis-
sion oil must be changed as follows at
the intervals specified in the periodic
maintenance and lubrication chart.
1. Start the engine, warm up the fi -
nal transmission oil by riding the
scooter for several minutes, and
then stop the engine.
2. Place the scooter on the center-
stand.
3. Place an oil pan under the final
transmission case to collect the
used oil.
ZAUM00**
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1. Final transmission oil fi ller cap4. Remove the fi nal transmission oil
filler cap and its O-ring from the
fi nal transmission case.
5. Remove the fi nal transmission oil
drain bolt and its gasket to drain
the oil from the fi nal transmission
case.
ZAUM00**
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1. Final transmission oil drain bolt6. Install the final transmission oil
drain bolt and its new gasket, and
then tighten the bolt to the speci-
fi ed torque.Tightening torque:
Final transmission oil drain bolt:
23 Nm (2.3 m·kgf, 16.6 ft·lbf)7. Refi ll with the specifi ed amount of
the recommended fi nal transmis-
sion oil. WARNING! Make sure
that no foreign material enters
the final transmission case.
Make sure that no oil gets on
the tire or wheel.
[EWA11311]
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6-13
EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENTRecommended final transmission
oil:
See page 8-1.
Oil quantity:
0.11 L (0.12 US qt, 0.10 Imp.qt)8. Install the final transmission oil
fi ller cap and its new O-ring, and
then tighten the oil fi ller cap.
9. Check the fi nal transmission case
for oil leakage. If oil is leaking,
check for the cause.
EAUT3120
Air filter and V-belt case air
lter elementsThe air filter and V-belt case air filter
elements should be cleaned at the in-
tervals specifi ed in the periodic main-
tenance and lubrication chart. Check
both filter elements more frequently
if you are riding in unusually wet or
dusty areas. The air fi lter check hoses
must be frequently checked and
cleaned if necessary.
Replacing the air lter element
1. Place the scooter on the center-
stand.2. Remove the air filter case cover
by removing the screws.
ZAUM00**
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2(✕6)
1. Air fi lter case cover
2. Screw3. Pull the air fi lter element out.
4. Insert a new air fi lter element into
the air fi lter case.
NOTICE:
Make
sure that the air filter element
is properly seated in the air
filter case. The engine should
never be operated without
the air filter element installed,
otherwise the piston(s) and/or
cylinder(s) may become exces-
sively worn.
[ECA10481]
5. Install the air fi lter case cover by
installing the screws.
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6-14
EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
Cleaning the air lter check hoses
1. Check the hoses on the front and
rear side of the air filter case for
accumulated dirt or water.ZAUM00**
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1. Air fi lter check hose2. If dirt or water is visible, remove
the hoses, clean them, and then
install them.Cleaning the V-belt case air filter
element
1. Remove the V-belt air filter case
cover by removing the screws.
ZAUM00**
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1. V-belt air fi lter case cover2. Remove the fi lter element holder
by removing the screw.ZAUM00**
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1. Air fi lter element holder
3. Pull the air fi lter element out, and
then clean it with solvent. After
cleaning, remove the remain-
ing solvent by squeezing the
element. WARNING! Use only a
dedicated parts cleaning sol-
vent. To avoid the risk of re or
explosion, do not use gasoline
or solvents with a low flash
point.
[EWA10431]
NOTICE:
To avoid
damaging the air lter element,
handle it gently and carefully,
and do not twist it.
[ECA10521]
ZAUM00**
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1. V-belt case air fi lter element4. Apply oil of the recommended
type to the entire surface of
the sponge material, and then
squeeze the excess oil out.
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6-15
EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENTTIPThe air filter element should be wet
but not dripping.Recommended oil:
Yamaha foam air filter oil or other
quality foam air fi lter oil5. Insert the element into the air fi l-
ter case.
6. Install the fi lter element holder by
installing the screw.
7. Install the V-belt air filter case
cover by installing the screws.
EAU21401
Valve clearanceThe valve clearance changes with
use, resulting in improper air-fuel mix-
ture and/or engine noise. To prevent
this from occurring, the valve clear-
ance must be adjusted by a Yamaha
dealer at the intervals specifi ed in the
periodic maintenance and lubrication
chart.
EAU21384
Checking the throttle grip
free playThe throttle grip free play should mea-
sure 3 ~ 5 mm (0.12 ~ 0.20 in) at the
inner edge of the throttle grip. Periodi-
cally check the throttle grip free play
and, if necessary, have a Yamaha
dealer adjust it.ZAUM00**
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1. Throttle cable free play
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6-21
EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
EAU43641
Lubricating the front and rear
brake leversZAUM00**ZAUM00**
The pivoting points of the front and
rear brake levers must be lubricated
at the intervals specifi ed in the period-
ic maintenance and lubrication chart.
EAU23095
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
lubricated if necessary. If a cable is
damaged or does not move smoothly,
have a Yamaha dealer check or re-
place it.
WARNING! Damage to the outer
housing of cables may result in
internal rusting and cause inter-
ference with cable movement.
Replace damaged cables as soon
as possible to prevent unsafe
conditions.
[EWA10711]
Recommended lubricant:
Yamaha Chain and Cable Lube or
engine oil
EAU23114
Checking and lubricating the
throttle grip and cableThe operation of the throttle grip
should be checked before each ride.
In addition, the cable should be lubri-
cated by a Yamaha dealer at the inter-
vals specified in the periodic mainte-
nance chart.
The throttle cable is equipped with a
rubber cover. Make sure that the cov-
er is securely installed. Even though
the cover is installed correctly, it does
not completely protect the cable from
water entry. Therefore, use care not to
pour water directly onto the cover or
cable when washing the vehicle. If the
cable or cover becomes dirty, wipe
clean with a moist cloth.
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8-1
SPECIFICATIONS SPECIFICATIONS
EAU50915
DimensionsOverall length
1855 mm (73.0 in)
Overall width
685 mm (27.0 in)
Overall height
1130 mm (44.5 in)
Seat height
785 mm (30.9 in)
Wheelbase
1295 mm (51.0 in)
Ground clearance
113 mm (4.45 in)
Minimum turning radius
1900 mm (74.8 in)WeightCurb weight
120 kg (265 lb)EngineEngine type
Air cooled 4-stroke, SOHC
Cylinder arrangement
Single cylinder
Displacement
125 cm
3
Bore x stroke
52.4 x 57.9 mm (2.06 x 2.28 in)
Compression ratio
10.00 :1
Starting system
Electric starter and kickstarter
Lubrication system
Wet sump
Engine oilRecommended brand
YAMALUBE
Type
SAE 10W-30, 10W-40, 10W-50, 15W-40,
20W-40 or 20W-50
–20 –10 0
1020 30 40 50 ˚C 10 30 50 70 90 110 0 130 ˚F
SAE 10W-30
SAE 15W-40SAE 20W-40SAE 20W-50
SAE 10W-40SAE 10W-50
Recommended engine oil grade
API service SG type or higher, JASO
standard MAEngine oil quantityPeriodic oil change
0.90 L (0.95 US qt, 0.79 Imp.qt)Final transmission oilType
SAE 10W-30 type SE motor oil
Quantity
0.11 L (0.12 US qt, 0.10 Imp.qt)Air lterAir fi lter element
Wet elementFuelRecommended fuel
Regular unleaded gasoline onlyFuel tank capacity
7.4 L (1.96 US gal, 1.63 Imp.gal)
Throttle bodyID mark
4P91 00
Manufacturer
MIKUNISpark plug(s)Manufacturer/model
NGK/CR7E
Spark plug gap
0.7-0.8 mm (0.028-0.031 in)ClutchClutch type
Dry, centrifugal automaticTransmissionPrimary reduction ratio
1.000
Secondary reduction ratio
9.744 (38/13 40/12)
Final drive
Gear
Transmission type
V-belt automaticChassisFrame type
Backbone
Caster angle
27.00 degree
Trail
90 mm (3.5 in)Front tireType
Tubeless
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SPECIFICATIONS
Size
110/70-12 47L
Manufacturer/model
CHENG SHIN / C-992NRear tireType
Tubeless
Size
120/70-12 58L
Manufacturer/model
CHENG SHIN / C-6007LoadingMaximum load
157 kg (346 lb)Tire air pressure (measured on cold
tires)Loading condition
0-90 kg (0-198 lb)
Front
175 kPa (1.75 kgf/cm
2, 25 psi, 1.75 bar)
Rear
200 kPa (2.00 kgf/cm2, 29 psi, 2.00 bar)
Loading condition
90 kg - maximum load
Front
200 kPa (2.00 kgf/cm2, 29 psi, 2.00 bar)
Rear
225 kPa (2.25 kgf/cm2, 33 psi, 2.25 bar)
Front wheelWheel type
Cast wheel
Rim size
J12 X MT2.75
Rear wheelWheel type
Cast wheel
Rim size
J12 X MT3.00Front brakeType
Single disc brake
Operation
Right hand operation
Recommended fl uid
DOT 4Rear brakeType
Drum brake
Operation
Left hand operationFront suspensionType
Telescopic fork
Spring/shock absorber type
Coil spring/oil damper
Wheel travel
78.0 mm (3.07 in)Rear suspensionType
Unit swing
Spring/shock absorber type
Coil spring/oil damper
Wheel travel
95.5 mm (3.76 in)Electrical systemIgnition system
TCICharging system
AC magneto
BatteryModel
MF (YT7B-BS)
Voltage, capacity
12 V, 6.5 AhHeadlightBulb type
Halogen bulbBulb voltage, wattage x quantityHeadlight
12 V, 60 W/55 W x 1
Tail/brake light
12 V, 5.0 W/21.0 W x 1
Front turn signal light
12 V, 10.0 W x 2
Rear turn signal light
12 V, 10.0 W x 2
Auxiliary light
12 V, 5.0 W x 2
Meter lighting
LED x 2
High beam indicator light
LED x 1
Turn signal indicator light
LED x 1FusesMain fuse
20.0 A
Headlight fuse
15.0 A
Taillight fuse
7.5 A
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