2007 YAMAHA CYGNUS 125 key battery

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

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

OPERATION AND IMPORTANT RIDING POINTS
EAU15980
WARNING

EWA10870

Become thoroughly familiar
with all operating controls and
their functions before riding.
Consult a Yamaha dealer re-
garding any control or function
that you do not thoroughly un-
derstand.

Never start the engine or oper-
ate it in a closed area for any
length of time. Exhaust fumes
are poisonous, and inhaling
them can cause loss of con-
sciousness and death within a
short time. Always make sure
that there is adequate ventila-
tion.

For safety, always start the en-
gine with the centerstand down.
EAUT1861
Starting the engine
CAUTION:

ECA10250
See page 5-3 for engine break-in in-
structions prior to operating the ve-
hicle for the first time.
In order for the ignition circuit cut-off
system to enable starting, the side-
stand must be up.
WARNING

EWA10290

Before starting the engine,
check the function of the igni-
tion circuit cut-off system ac-
cording to the procedure
described on page 3-12.

Never ride with the sidestand
down.
1. Turn the key to “ON”.
CAUTION:

ECAT1040
The engine trouble warning light
should come on for a few seconds,
then go off. If the warning light does
not go off, have a Yamaha dealer
check the electrical circuit.
2. Close the throttle completely.3. Start the engine by pushing the
start switch while applying the front
or rear brake.
NOTE:

If the engine does not start, release the
start switch, wait a few seconds, and
then try again. Each starting attempt
should be as short as possible to pre-
serve the battery. Do not crank the en-
gine more than 5 seconds on any one
attempt. If the engine does not start
with the starter motor, try using the
kickstarter.
CAUTION:

ECA11040
For maximum engine life, never ac-
celerate hard when the engine is
cold!

PERIODIC MAINTENANCE AND MINOR REPAIR
6-24
2
3
4
5
67
8
9

EAUT1914
Replacing the fuses
The main fuse box is located above the
battery.
The fuse box, which contains the fuses
for the individual circuits, is located in
the storage compartment. (See
page 3-10.)If a fuse is blown, replace it as follows.
1. Turn the key to “OFF” and turn off
the electrical circuit in question.
2. Remove the blown fuse, and then
install a new fuse of the specified
amperage.
CAUTION:

ECAT1061

Do not use a fuse of a higher
amperage rating than recom-
mended to avoid causing exten-
sive damage to the electrical
system and possibly a fire.

After removing and installing
the main fuse, be sure to turn
the main switch from “ON” to
“OFF” three times in 3 seconds
intervals to initialize the idle
speed control system.
3. Turn the key to “ON” and turn on
the electrical circuit in question to
check if the device operates.
1. Main fuse
ZAUM00**
1

1. Lid
2. Backup fuse
3. Ignition fuse
4. Signaling system fuse
5. Taillight fuse
6. Headlight fuse
ZAUM00**
1
234
5
6

Specified fuses:
Main fuse:
20.0 A
Headlight fuse:
15.0 A
Signaling system fuse:
15.0 A
Ignition fuse:
7.5 A
Backup fuse:
7.5 A
Taillight fuse:
7.5 A

INDEX
A
Acceleration and deceleration................... 5-2
Air filter and V-belt case air filter
elements ............................................... 6-12
Auxiliary light bulb, replacing .................. 6-27
B
Battery..................................................... 6-22
Brake fluid, changing .............................. 6-19
Brake fluid level, checking ...................... 6-18
Brake lever, front....................................... 3-6
Brake lever, rear ....................................... 3-7
Brake levers, lubricating.......................... 6-20
Brake pads and shoes, checking ............ 6-17
Braking ...................................................... 5-2
C
Cables, checking and lubricating ............ 6-19
Care .......................................................... 7-1
Catalytic converter .................................... 3-9
Centerstand and sidestand, checking and
lubricating ............................................. 6-20
D
Dimmer switch .......................................... 3-6
E
Engine break-in ......................................... 5-3
Engine oil and oil strainer.......................... 6-9
Engine trouble warning light...................... 3-3
F
Final transmission oil .............................. 6-11
Front fork, checking ................................ 6-21
Fuel ........................................................... 3-8
Fuel consumption, tips for reducing .......... 5-3
Fuel tank cap ............................................ 3-7
Fuses, replacing...................................... 6-24
H
Handlebar switches ...................................3-5
Headlight bulb, replacing .........................6-25
High beam indicator light ...........................3-2
Horn switch ................................................3-6
I
Identification numbers................................9-1
Indicator and warning lights .......................3-2
K
Keyhole cover ............................................3-2
Key identification number ..........................9-1
Kickstarter ..................................................3-9
M
Main switch ................................................3-1
Matte color, caution ...................................7-1
Model label ................................................9-2
Multi-function display .................................3-3
P
Panels, removing and installing .................6-6
Parking.......................................................5-4
Part locations .............................................2-1
Periodic maintenance and lubrication
chart ........................................................6-3
Pre-operation check list .............................4-2
R
Rear brake lever free play, adjusting .......6-16
S
Safe-riding points .......................................1-4
Safety information ......................................1-1
Seat ...........................................................3-9
Sidestand .................................................3-11
Sidestand switch operation check ...........3-12
Spark plug, checking .................................6-7
Specifications.............................................8-1Speedometer ............................................. 3-3
Starting off ................................................. 5-2
Starting the engine .................................... 5-1
Start switch ................................................ 3-6
Steering, checking ................................... 6-21
Storage ...................................................... 7-3
Storage compartments ............................ 3-10
T
Tail/brake light bulb or rear turn signal
light bulb, replacing ............................... 6-27
Throttle cable free play, checking............ 6-14
Throttle grip and cable, checking and
lubricating .............................................. 6-20
Tires ........................................................ 6-14
Tool kit ....................................................... 6-1
Troubleshooting....................................... 6-28
Troubleshooting chart.............................. 6-29
Turn signal indicator light .......................... 3-2
Turn signal light bulb (front), replacing .... 6-26
Turn signal switch...................................... 3-6
V
Valve clearance ....................................... 6-14
Vehicle identification number .................... 9-1
W
Wheel bearings, checking ....................... 6-22
Wheels .................................................... 6-16