fuel YAMAHA CYGNUS 125 2007 Owners Manual

TABLE OF CONTENTS
SAFETY INFORMATION
...................1-1
Further safe-riding points .................1-4
DESCRIPTION
...................................2-1
Left view ...........................................2-1
Right view .........................................2-2
Controls and instruments..................2-3
INSTRUMENT AND CONTROL
FUNCTIONS
........................................3-1
Main switch ......................................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 ..............................3-7
Fuel tank cap ...................................3-7
Fuel ..................................................3-8
Catalytic converter ...........................3-9
Kickstarter ........................................3-9
Seat .................................................3-9
Storage compartments ..................3-10
Sidestand .......................................3-11
Sidestand switch operation check .3-12
PRE-OPERATION CHECKS
...............4-1
Pre-operation check list ...................4-2
OPERATION 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
MINOR REPAIR
.................................. 6-1
Owner’s tool kit ................................ 6-1
Periodic maintenance and lubrication
chart ............................................. 6-3
Removing and installing panels ...... 6-6
Checking the spark plug .................. 6-7
Engine oil and oil strainer ................ 6-9
Final transmission oil ..................... 6-11
Air filter and V-belt case air filter
elements .................................... 6-12
Checking the throttle cable free
play ............................................ 6-14
Valve clearance ............................. 6-14
Tires .............................................. 6-14
Cast wheels ................................... 6-16
Adjusting the rear brake lever free
play ............................................ 6-16
Checking the front brake pads and
rear brake shoes ........................ 6-17Checking the front brake fluid
level ........................................... 6-18
Changing the brake fluid ............... 6-19
Checking and lubricating the
cables ........................................ 6-19
Checking and lubricating the throttle
grip and cable ............................ 6-20
Lubricating the front and rear brake
levers ......................................... 6-20
Checking and lubricating the
centerstand and sidestand ........ 6-20
Checking the front fork .................. 6-21
Checking the steering ................... 6-21
Checking the wheel bearings ........ 6-22
Battery ........................................... 6-22
Replacing the fuses ...................... 6-24
Replacing the headlight bulb ........ 6-25
Replacing a front turn signal light
bulb ............................................ 6-26
Replacing the tail/brake light bulb or
a rear turn signal light bulb ........ 6-27
Replacing an auxiliary light bulb ... 6-27
Troubleshooting ............................ 6-28
Troubleshooting chart ................... 6-29
SCOOTER CARE AND
STORAGE
........................................... 7-1
Matte color caution .......................... 7-1
Care ................................................ 7-1
Storage ........................................... 7-3

SAFETY INFORMATION
1-3
1
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. 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 sud-
den imbalance. Make sure that ac-
cessories and cargo are securely
attached to the scooter before
riding. Check accessory mounts
and cargo restraints frequently.

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 response.
Accessories
Genuine Yamaha accessories have
been specifically designed for use on
this scooter. Since Yamaha cannot test
all other accessories that may be avail-
able, you must personally be responsi-
ble for the proper selection, installationand use of non-Yamaha accessories.
Use extreme caution when selecting
and installing any accessories.
Keep the following guidelines in mind,
as well as those provided under “Load-
ing” when mounting accessories.


Never install accessories or carry
cargo that would impair the perfor-
mance of your scooter. Carefully
inspect the accessory before using
it to make sure that it does not in
any way reduce ground clearance
or cornering clearance, limit sus-
pension travel, steering travel or
control operation, or obscure lights
or reflectors.

Accessories fitted to the handle-
bar or the front fork area can
create instability due to improper
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 aerodynamiceffects. 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 free-
dom of movement of the opera-
tor and may limit control ability,
therefore, such accessories are
not recommended.

Use caution when adding electri-
cal accessories. If electrical acces-
sories 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.
Gasoline and exhaust gas

GASOLINE IS HIGHLY FLAMMA-
BLE:

Always turn the engine off when
refueling.

SAFETY INFORMATION
1-4
1

Take care not to spill any gaso-
line on the engine or exhaust
system when refueling.

Never refuel while smoking or in
the vicinity of an open flame.

Never start the engine or let it run
for any length of time in a closed
area. The exhaust fumes are poi-
sonous and may cause loss of
consciousness and death within a
short time. Always operate your
scooter in an area that has ade-
quate ventilation.

Always turn the engine off before
leaving the scooter unattended
and remove the key from the main
switch. When parking the scooter,
note the following:

The engine and exhaust system
may be hot, therefore, park the
scooter in a place where pedes-
trians or children are not likely to
touch these hot areas.

Do not park the scooter on a
slope or soft ground, otherwise it
may fall over.

Do not park the scooter near a
flammable source (e.g., a kero-sene heater, or near an open
flame), otherwise it could catch
fire.

If you should swallow any gaso-
line, inhale a lot of gasoline vapor,
or allow gasoline to get into your
eyes, see your doctor immediate-
ly. If any gasoline spills on your
skin or clothing, immediately wash
the affected area with soap and
water and change your clothes.
EAU10371
Further safe-riding points

Be sure to signal clearly when
making turns.
Left turn
Right turn

Braking can be extremely difficult
on a wet road. Avoid hard braking,
because the scooter could slide.
ZAUM00**ZAUM00**

2-1
1
2
3
4
5
6
7
8
9

DESCRIPTION
EAU10410
Left view
4
3 2
1
6
5

1. Fuel tank cap (page 3-7)
2. Rear storage compartment (page 3-10)
3. Rear turn signal light (page 6-27)
4. Tail/brake light (page 6-27)
5. Kickstarter (page 3-9)
6. Air filter (page 6-12)

INSTRUMENT AND CONTROL FUNCTIONS
3-3
2
34
5
6
7
8
9

EAUT1930
Engine trouble warning light “”
This warning light flashes when an
electrical circuit monitoring the engine
is defective. When this occurs, have a
Yamaha dealer check the self-diagno-
sis system.
The electrical circuit of the warning light
can be checked by turning the key to
“ON”. If the warning light does not come
on for a few seconds, then go off, have
a Yamaha dealer check the electrical
circuit.
EAU11601
Speedometer
The speedometer shows the riding
speed.
When the key is turned to “ON”, the
speedometer needle will sweep once
across the speed range and then return
to zero in order to test the electrical cir-
cuit.
EAUT1952
Multi-function display
WARNING

EWA14430
Be sure to stop the vehicle before
making any setting changes to the
multi-function display.
The multi-function display is equipped
with the following:

an odometer (which shows the to-
tal distance traveled)
1. Speedometer
ZAUM00**
RESET
SELECT
1
1. Tripmeter
2. Oil change indicator “ ”
3. Odometer
4. Fuel meter
5. “RESET” button
6. “SELECT” button
7. Clock
ZAUM00**
RESET
SELECT
1
2
3
4
5
6
7

INSTRUMENT AND CONTROL FUNCTIONS
3-4
1
2
3
4
5
6
7
8
9


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
NOTE:


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” be-
fore using the “SELECT” and “RE-
SET” buttons.
Odometer, tripmeter and oil change
tripmeter modes
Pushing the “SELECT” button switches
the display among the odometer mode
“ODO”, the tripmeter mode “TRIP” and
the oil change tripmeter “OIL CHANGE
TRIP” in the following order:ODO
→
TRIP
→
OIL CHANGE TRIP
→
ODO
Odometer
NOTE:

If the odometer indicates “-----”, have a
Yamaha dealer check the multi-func-
tion display, as it may be faulty.
Tripmeter
To reset the tripmeter, select it by push-
ing the “SELECT” button until “TRIP” is
displayed, and then push the “RESET”
button at least 1 second.
NOTE:

If the tripmeter indicates “-----”, have a
Yamaha dealer check the multi-func-
tion display, as it may be faulty.
Oil change tripmeter
To reset the oil change tripmeter, select
it by pushing the “SELECT” button until
“OIL CHANGE TRIP” is displayed, and
then push the “RESET” button at least
3 seconds. After resetting the oil
change tripmeter, “ODO” will be dis-
played.
NOTE:

If the “SELECT” button is pushed again
or the “SELECT” button hasn’t been
pushed within 10 seconds, the oil
change tripmeter will keep counting
and “ODO” will be displayed.
Oil change indicator
Oil change indicator “”
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 indi-
cated at the correct time.
NOTE:


If the oil change tripmeter is reset
before the initial 1000 km (600 mi),
the next periodic oil change inter-

INSTRUMENT AND CONTROL FUNCTIONS
3-5
2
34
5
6
7
8
9
val will be at every 3000 km (1800
mi) thereafter.


If the oil change tripmeter indicates
“-----”, have a Yamaha dealer
check the multi-function display,
as it may be faulty.
Clock
To set the clock:
1. Push the “SELECT” button and
“RESET” button together for at
least two seconds.
2. When the hour digits start flashing,
push the “SELECT” button to set
the hours.
3. Push the “RESET” button, and the
first minute digit will start flashing.
4. Push the “SELECT” button to set
the first minute digit.
5. Push the “RESET” button and the
second minute digit will start flash-
ing.
6. Push the “SELECT” button to set
the second minute digit.
7. Push the “RESET” button and then
release it to start the clock.
Fuel meter
The fuel meter indicates the amount of
fuel in the fuel tank. The display seg-
ments of the fuel meter disappear to-
wards “E” (Empty) as the fuel level
decreases. When “ ” starts flashing,
refuel as soon as possible. When the
key is turned to “ON”, all of the display
segments of the fuel meter will appear
for a few seconds, and then shown ac-
tual fuel level.

EAU12347
Handlebar switches
Left
1. Dimmer switch “ / ”
2. Turn signal switch “ / ”
3. Horn switch “ ”
ZAUM00**
3 1
2

INSTRUMENT AND CONTROL FUNCTIONS
3-7
2
34
5
6
7
8
9

EAU12950
Rear brake lever
The rear brake lever is located on the
left handlebar grip. To apply the rear
brake, pull this lever toward the handle-
bar grip.
EAU13071
Fuel tank cap
To open the fuel tank cap
Open the fuel tank cap lock cover, in-
sert the key into the lock, and then turn
it 1/4 turn clockwise. The lock will be re-
leased and the fuel tank cap can be
opened.
To close the fuel tank cap
1. Push the fuel tank cap into position
with the key inserted in the lock.
2. Turn the key counterclockwise to
the original position, remove it, and
then close the lock cover.
NOTE:

The fuel tank cap cannot be closed un-less the key is in the lock. In addition,
the key cannot be removed if the cap is
not properly closed and locked.
WARNING

EWA11090
Make sure that the fuel tank cap is
properly closed before riding.
1. Rear brake lever
ZAUM00**
1

1. Fuel tank cap lock cover
ZAUM00**
1

INSTRUMENT AND CONTROL FUNCTIONS
3-8
1
2
3
4
5
6
7
8
9

EAU13220
Fuel
Make sure that there is sufficient fuel in
the tank. When refueling, be sure to in-
sert the pump nozzle into the fuel tank
filler hole and to fill the tank to the bot-
tom of the filler tube as shown.
WARNING

EWA10880

Do not overfill the fuel tank, oth-
erwise it may overflow when the
fuel warms up and expands.

Avoid spilling fuel on the hot en-
gine.
CAUTION:

ECA10070
Immediately wipe off spilled fuel
with a clean, dry, soft cloth, since
fuel may deteriorate painted surfac-
es or plastic parts.
EAU33520
CAUTION:

ECA11400
Use only unleaded gasoline. The use
of leaded gasoline will cause severe
damage to internal engine parts,
such as the valves and piston rings,
as well as to the exhaust system.
Your Yamaha engine has been de-
signed to use regular unleaded gaso-
line with a research octane number of
91 or higher. If knocking (or pinging) oc-
curs, use a gasoline of a different brand
or premium unleaded fuel. Use of un-leaded fuel will extend spark plug life
and reduce maintenance costs.
1. Fuel tank filler tube
2. Fuel level
ZAUM00**
1
2

Recommended fuel:
REGULAR UNLEADED GASOLINE
ONLY
Fuel tank capacity:
7.4 L (1.96 US gal) (1.63 Imp.gal)

PRE-OPERATION CHECKS
4-2
1
2
3
4
5
6
7
8
9

EAU15605
Pre-operation check list
ITEM CHECKS PAGE
Fuel

Check fuel level in fuel tank.

Refuel if necessary.

Check fuel line for leakage.3-8
Engine oil

Check oil level in engine.

If necessary, add recommended oil to specified level.

Check vehicle for oil leakage.6-9
Final transmission oil

Check vehicle for oil leakage. 6-11
Front brake

Check operation.

If soft or spongy, have Yamaha dealer bleed hydraulic system.

Check brake pads for wear.

Replace if necessary.

Check fluid level in reservoir.

If necessary, add recommended brake fluid to specified level.

Check hydraulic system for leakage.6-17, 6-18
Rear brake

Check operation.

Lubricate cable if necessary.

Check lever free play.

Adjust if necessary.6-16, 6-17
Throttle grip

Make sure that operation is smooth.

Check cable free play.

If necessary, have Yamaha dealer adjust cable free play and lubricate cable
and grip housing.6-14, 6-20
Wheels and tires

Check for damage.

Check tire condition and tread depth.

Check air pressure.

Correct if necessary.6-14, 6-16
Brake levers

Make sure that operation is smooth.

Lubricate lever pivoting points if necessary.6-20