2012 YAMAHA CYGNUS 125 engine

TABLE OF CONTENTSSAFETY INFORMATION .................... 1-1
Further safe-riding points ................. 1-5
DESCRIPTION .................................... 2-1
Left view ........................................... 2-1
Right view ......................................... 2-2
Controls and instruments ................. 2-3
INSTRUMENT AND CONTROL FUNC-
TIONS .................................................. 3-1
Main switch/steering lock ................. 3-1
Keyhole cover .................................. 3-2
Indicator and warning lights ............. 3-2
Speedometer .................................... 3-3
Multi-function display ........................ 3-3
Handlebar switches .......................... 3-5
Front brake lever .............................. 3-6
Rear brake lever ............................... 3-6
Fuel tank cap .................................... 3-7
Fuel .................................................. 3-7
Catalytic converters .......................... 3-9
Kickstarter ........................................ 3-9
Seat ................................................ 3-10
Storage compartments ................... 3-10
Sidestand ....................................... 3-11
Ignition circuit cut-off system .......... 3-12
FOR YOUR SAFETY - PRE-OPERATION
CHECKS ............................................. 4-1OPERATION AND IMPORTANT RIDING
POINTS ............................................... 5-1
Starting the engine ........................... 5-1
Starting off ........................................ 5-2
Acceleration and deceleration .......... 5-2
Braking ............................................. 5-2
Tips for reducing fuel consumption .. 5-3
Engine break-in ................................ 5-3
Parking ............................................. 5-4
PERIODIC MAINTENANCE AND AD-
JUSTMENT ......................................... 6-1
Owner’s tool kit ................................. 6-2
Periodic maintenance chart for the
emission control system ............... 6-3
General maintenance and lubrication
chart .............................................. 6-4
Removing and installing panels ....... 6-7
Checking the spark plug ................... 6-8
Engine oil and oil strainer ............... 6-10
Final transmission oil ...................... 6-12
Air fi lter and V-belt case air fi lter
elements ..................................... 6-13
Checking the throttle grip free
play ............................................. 6-15
Valve clearance .............................. 6-15
Tires ............................................... 6-16
Cast wheels .................................... 6-17
Checking the brake lever free
play ............................................. 6-18Adjusting the rear brake lever free
play ............................................. 6-18
Checking the front brake pads and
rear brake shoes ......................... 6-19
Checking the brake fl uid level ........ 6-19
Changing the brake fl uid ................ 6-20
Checking and lubricating the
cables ......................................... 6-21
Checking and lubricating the throttle grip
and cable .................................... 6-21
Lubricating the front and rear brake
levers .......................................... 6-21
Checking and lubricating the
centerstand and sidestand .......... 6-22
Checking the front fork ................... 6-23
Checking the steering .................... 6-23
Checking the wheel bearings ......... 6-24
Battery ............................................ 6-24
Replacing the fuses ........................ 6-26
Replacing the headlight bulb .......... 6-27
Replacing a front turn signal light
bulb ............................................. 6-28
Replacing the tail/brake light bulb or a
rear turn signal light bulb ............ 6-28
Replacing an auxiliary light bulb ..... 6-29
Troubleshooting ............................. 6-29
Troubleshooting chart .................... 6-31
SCOOTER CARE AND STORAGE .... 7-1
Matte color caution ........................... 7-1
Care ................................................. 7-1
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Q
SAFETY INFORMATION
• Always obey the speed limit
and never travel faster than
warranted 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 scooter.
• 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 foot-
rests. Never carry a passenger
unless he or she can firmly
place both feet on the passen-
ger footrests.● Never ride under the infl uence of
alcohol or other drugs.● This scooter is designed for on-
road use only. It is not suitable for off-road use.
Protective Apparel
The majority of fatalities from scooter
accidents are the result of head inju-
ries. The use of a safety helmet is the
single most critical factor in the pre-
vention 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, substantial
shoes, 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 or wheels and
cause injury or an accident.● Always wear protective clothing
that covers your legs, ankles,
and feet. The engine or exhaust
system become very hot during
or after operation and can cause
burns.
● A passenger should also observe
the above precautions.
Avoid Carbon Monoxide Poisoning
All engine exhaust contains carbon
monoxide, a deadly gas. Breathing
carbon monoxide can cause head-
aches, dizziness, drowsiness, nausea,
confusion, and eventually death.
Carbon Monoxide is a colorless,
odorless, tasteless gas which may
be present even if you do not see or
smell any engine exhaust. Deadly
levels of carbon monoxide can collect
rapidly and you can quickly be over-
come and unable to save yourself.
Also, deadly levels of carbon mon-
oxide can linger for hours or days in
enclosed or poorly ventilated areas.
If you experience any symptoms of
carbon monoxide poisoning, leave the
area immediately, get fresh air, and
SEEK MEDICAL TREATMENT.●
Do not run engine indoors. Even
if you try to ventilate engine ex-
haust with fans or open windows
and doors, carbon monoxide can
rapidly reach dangerous levels.
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Q
SAFETY INFORMATION●
Do not run engine in poorly ven-
tilated or partially enclosed areas
such as barns, garages, or car-
ports.
●
Do not run engine outdoors
where engine exhaust can be
drawn into a building through
openings such as windows and
doors.
Loading
Adding accessories or cargo to your
scooter can adversely affect stability
and handling if the weight distribution
of the scooter is changed. To avoid
the possibility of an accident, use ex-
treme caution when adding cargo or
accessories to your scooter. Use extra
care when riding a scooter that has
added cargo or accessories. Here,
along with the information about ac-
cessories below, are some general
guidelines to follow if loading cargo to
your scooter:
The total weight of the operator,
passenger, accessories and cargo
must not exceed the maximum load
limit. Operation of an overloaded
vehicle could cause an accident.
Maximum load:
157 kg (346 lb)When loading within this weight limit,
keep the following in mind:●
Cargo and accessory weight
should be kept as low and close
to the scooter as possible. Se-
curely pack your heaviest items
as close to the center of the ve-
hicle as possible and make sure
to distribute the weight as evenly
as possible on both sides of the
scooter to minimize imbalance or
instability.
●
Shifting weights can create a
sudden imbalance. Make sure
that accessories and cargo are
securely attached to the scooter
before riding. Check accessory
mounts and cargo restraints fre-
quently.
• Properly adjust the suspen-
sion for your load (suspension-
adjustable models only), and
check the condition and pres-
sure of your tires.
• Never attach any large or heavy items to the handlebar,
front fork, or front fender. Such
items can create unstable
handling or a slow steering re-
sponse.
●
This vehicle is not designed to
pull a trailer or to be attached
to a sidecar.
Genuine Yamaha Accessories
Choosing accessories for your vehicle
is an important decision. Genuine
Yamaha accessories, which are avail-
able only from a Yamaha dealer, have
been designed, tested, and approved
by Yamaha for use on your vehicle.
Many companies with no connection
to Yamaha manufacture parts and ac-
cessories or offer other modifications
for Yamaha vehicles. Yamaha is not
in a position to test the products that
these aftermarket companies pro-
duce. Therefore, Yamaha can neither
endorse nor recommend the use of
accessories not sold by Yamaha or
modifications not specifically recom-
mended by Yamaha, even if sold and
installed by a Yamaha dealer.
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Q
SAFETY INFORMATION
Aftermarket Parts, Accessories,
and Modi cations
While you may fi nd aftermarket prod-
ucts similar in design and quality to
genuine Yamaha accessories, recog-
nize that some aftermarket accesso-
ries or modifications are not suitable
because of potential safety hazards
to you or others. Installing aftermarket
products or having other modifi cations
performed to your vehicle that change
any of the vehicle’s design or opera-
tion characteristics can put you and
others at greater risk of serious injury
or death. You are responsible for inju-
ries related to changes in the vehicle.
Keep the following guidelines in mind,
as well as those provided under
“Loading” when mounting accesso-
ries.●
Never install accessories or carry
cargo that would impair the per-
formance of your scooter. Care-
fully inspect the accessory before
using it to make sure that it does
not in any way reduce ground
clearance or cornering clearance,
limit suspension travel, steering travel or control operation, or ob-
scure lights or refl ectors.
• Accessories fitted to the han-
dlebar or the front fork area can
create instability due to improp-
er weight distribution or aerody-
namic changes. If accessories
are added to the handlebar or
front fork area, they must be
as lightweight as possible and
should be kept to a minimum.
• Bulky or large accessories may
seriously affect the stability of
the scooter due to aerodynamic
effects. Wind may attempt to
lift the scooter, or the scooter
may become unstable in cross
winds. These accessories may
also cause instability when
passing or being passed by
large vehicles.
• Certain accessories can dis-
place the operator from his or
her normal riding position. This
improper position limits the
freedom of movement of the
operator and may limit control
ability, therefore, such acces-sories are not recommended.
●
Use caution when adding electri-
cal accessories. If electrical ac-
cessories exceed the capacity of
the scooter’s electrical system, an
electric failure could result, which
could cause a dangerous loss of
lights or engine power.
Aftermarket Tires and Rims
The tires and rims that came with your
scooter were designed to match the
performance capabilities and to pro-
vide the best combination of handling,
braking, and comfort. Other tires,
rims, sizes, and combinations may not
be appropriate. Refer to page 6-17 for
tire specifications and more informa-
tion on replacing your tires.
Transporting the Scooter
Be sure to observe following instruc-
tions before transporting the scooter
in another vehicle.
●
Remove all loose items from the
scooter.
●
Point the front wheel straight
ahead on the trailer or in the truck
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3-1
EAU1044E
INSTRUMENT AND CONTROL FUNCTIONS
EAU1044E
INSTRUMENT AND CONTROL FUNCTIONS
EAU45440
Main switch/steering lockZAUM00**ON
OFF
LOCK
The main switch/steering lock controls
the ignition and lighting systems, and
is used to lock the steering. The vari-
ous positions are described below.TIPThe main switch/steering lock is
equipped with a keyhole cover. (See
page 3-2.)
EAUT1971
ON
All electrical circuits are supplied with
power; the meter lighting, taillight, and
auxiliary lights come on, and the en-
gine can be started. The key cannot
be removed.
TIPThe headlight comes on automatically
when the engine is started and stays
on until the key is turned to “OFF” or
the sidestand is moved down.
EAU10661
OFF
All electrical systems are off. The key
can be removed.
EWA10061
WARNING
Never turn the key to “OFF” or
“LOCK” while the vehicle is mov-
ing. Otherwise the electrical sys-
tems will be switched off, which
may result in loss of control or an
accident.
EAU10683
LOCK
The steering is locked, and all electri-
cal systems are off. The key can be
removed.
To lock the steeringZAUM00**
1
1. Push.1. Turn the handlebars all the way
to the left.
2. Push the key in from the “OFF”
position, and then turn it to
“LOCK” while still pushing it.
3. Remove the key.
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EAU1044E
INSTRUMENT AND CONTROL FUNCTIONS
EAUT2111
Keyhole coverZAUM00**
1
1. Keyhole cover leverTo open the keyhole cover
Insert the key bow into the keyhole
cover receptacle as shown, and then
turn the key to the right to open the
cover.
To close the keyhole cover
Push the keyhole cover lever inward
and the keyhole cover will close.
EAU11006
Indicator and warning lightsZAUM00**
RESET
SELECT
1
2
3
1. High beam indicator light “&”
2. Turn signal indicator light “5”
3. Engine trouble warning light “
”
EAU11020
Turn signal indicator light “
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.
EAUT1934
Engine trouble warning light “
”
This warning light fl ashes or stays on
if an electrical circuit monitoring the To unlock the steering
12
ZAUM00**1. Turn.
2. Release.Push the key in, and then turn it to
“OFF” while still pushing it.
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3-3
EAU1044E
INSTRUMENT AND CONTROL FUNCTIONS
engine is not working correctly. If this
occurs, have a Yamaha dealer check
the self-diagnosis system.
The electrical circuit of the warning
light can be checked by turning the
key to “ON”. The warning light should
come on for a few seconds, and then
go off.
If the warning light does not come
on initially when the key is turned to
“ON”, or if the warning light remains
on, have a Yamaha dealer check the
electrical circuit.
EAU11601
SpeedometerZAUM00**
RESET
SELECT
1
1. SpeedometerThe speedometer shows the riding
speed.
When the key is turned to “ON”, the
speedometer needle will sweep once
across the speed range and then re-
turn to zero in order to test the electri-
cal circuit.
EAUT1957
Multi-function display
EWA14431
WARNING
Be sure to stop the vehicle before
making any setting changes to the
multi-function display. Changing
settings while riding can distract
the operator and increase the risk
of an accident.ZAUM00**
RESET
SELECT
1
2
3
4
5
6
1. Oil change indicator “7”
2. Odometer
3. Fuel meter
4. “RESET” button
5. “SELECT” button
6. ClockThe multi-function display is equipped
with the following:●
an odometer
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EAU1044E
INSTRUMENT AND CONTROL FUNCTIONS●
a tripmeter (which shows the dis-
tance traveled since it was last
set to zero)
●
an oil change tripmeter (which
shows the distance traveled since
the last engine oil change)
●
an oil change indicator (which
flashes when the engine oil
should be changed)
●
a clock
●
a fuel meter
TIP●
When the key is turned to “ON”,
all segments of the display come
on for a few seconds. During this
time, the multi-function display is
performing a self-test.
●
Be sure to turn the key to “ON”
before using the “SELECT” and
“RESET” buttons.
Odometer, tripmeter and oil change
tripmeter modes
Pushing the “SELECT” button switch-
es the display among the odom-
eter mode “ODO”, the tripmeter mode
“TRIP” and the oil change tripmeter
“OIL CHANGE TRIP” in the following
order:
ODO → TRIP → OIL CHANGE TRIP
→ ODO
OdometerTIPIf the odometer indicates “-----”, have
a Yamaha dealer check the multi-
function display, as it may be faulty.
Tripmeter
To reset the tripmeter, select it by
pushing the “SELECT” button until
“TRIP” is displayed, and then push the
“RESET” button at least 1 second.TIPIf the tripmeter indicates “-----”, have
a Yamaha dealer check the multi-
function display, as it may be faulty.
Oil change tripmeter
To reset the oil change tripmeter, se-
lect it by pushing the “SELECT” but-
ton until “OIL CHANGE TRIP” is dis-
played, and then push the “RESET”
button at least 3 seconds.
Push the “SELECT” button again to
start the oil change tripmeter; the dis-
play changes to the ODO mode.
Oil change indicator “7”
This indicator flashes at the initial
1000 km (600 mi), then at every 3000
km (1800 mi) thereafter to indicate
that the engine oil should be changed.
After changing the engine oil, reset
the oil change tripmeter.
If 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.TIP●
If the oil change tripmeter is reset
before the initial 1000 km (600
mi), the next periodic oil change
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