2006 YAMAHA CYGNUS 125 engine

Thanks for your kind selection of our YAMAHA motorcycle series.
With the most up-to-date design of YAMAHA-motor (Japan) Co., Ltd., the YAMAHA motorcycle series we produced are
the most modern vehicles which represent the most advanced technology in the new century.
With the advanced one-cylinder four-stroke air-cooled engine, you will be satisfied with the novel design of our motor-
cycle series. The installation of every parts and components can meet the requirement of easy riding and comfortable
seating; also our products integrate the excellent durability with reliability perfectly. The motorcycles we produced are
powerful and fascinating vehicles as you wish.
This operation manual will show you the correct operation, the basic inspection, repair and installation messages. This
booklet illustrates the various functions of our YAMAHA motorcycles thoroughly, we are pretty sure that ride our
motorcycle series can make you feel comfortable and joyful.
If you have any questions about the operation, repair and installation, please feel free to contact with the technicians in
our specified maintenance stations which locate in different cities. Our tenet is "Best quality, Best reputation and
Consumer first", we can satisfy your various requirements.
Please keep this operation manual as a basic part of your YAMAHA motorcycle, and take it with the motorcycle at any
time. If you wish to resell your motorcycle, take this manual also.
Preface

MOTORCYCLE INFORMATION
1 Engine models and serial number2-1
2 Identification code2-1
3 Name plate2-1
4 Engine running-in2-2

MOTORCYCLE INFORMATION
■ ■■ ■
■Engine models and serial
numberThe model and serial number will be
engraved in the left part of the gear
box.
NOTE: Always remember the engine model
and serial number of your motorcycle,
so that, when ordering parts from our
specified maintenance stations, youwill get your parts sooner.
Engine models and serial number
Name plate
■ ■■ ■
■Identification codeThe identification code will be stamped
in the lower place of the front storage
compartment.
Identification code
The name plate will be stuck to the
right side of frame under the foot board
by rivet.■ ■■ ■
■Name plate
2-1

MOTORCYCLE INFORMATIONS■ ■■ ■
■Engine running-inThe distance between 0 and 1,000 km
is most important to your engine.
Keeping this fact in mind, please read
the following material carefully and
carry out as per instructions.
Since the engine is brand new, vari-
ous parts of the engine will wear and
polish themselves to the proper oper-
ating clearances. At the same time,
overloading the throttle or any other
conditions that might result in engine
overheating must be avoided in 0 -
1,000 km.
1. 0 - 150 km
Avoid prolonged operation above 1/3
throttle. After operating for an hour,
stop the engine and let it cool for five
to ten minutes. Vary the engine speed
from time to time and do no operatethe engine at full throttle.
2. 150 - 500 km
Avoid prolonged operation above 1/2
throttle.
3. 500 - 1,000 km
Avoid prolonged operation above 3/4
throttle.
CAUTION:

After 500 km of operation, replace
the engine oil and gear oil, and clean
the oil filter (bottom part). Replacethe engine oil every 1,500 km.
4. 1,000 km and beyond
Avoid prolonged full-throttle operation.
Vary the engine speed from time to
time.
2-2

1.Turn the switch to
position "ON", the
electric system will
be powered and the
engine can be
started.
2.The key can not be
removed.
1.Turn the switch to
position "OFF",
power off the elec-
tric system and the
engine will be
stopped.
2.The key can be
removed.
ON
OFF
LOCK
1.Power off the
engine, and turn the
key counterclockwise
to position "OPEN",
unlock the seat lock ;2.When the steering
system and the cen-
ter-stand are
locked, turn the key
counterclockwise to
position "OPEN",
unlock the seat lock;
3.The key can not
be removed.
1.Turn on electric door lock
2.Turn off electric door lock
4.
Lock the steering system and center-stand3.Open the rider seat
NOTE:
When you do not operate the
motorcycle, you should turn the key
to position "OFF" or "LOCK", and re-move the key.
1.Turn the handlebar, push the key in-
ward and turn to position LOCK
2.Remove the key(1.)If you do not ride the motorcycle, you can
turn the handlebar to left till the end of
travel, and lock the handlebar as per
following instructions to prevent your
motorcycle from being stolen:NOTE: When you lock the handlebar, you
should lock it when turning, do not push
the key inward to lock the handlebar
by force, it will cause inner core
broken.
When operating motorcycle, you
should not turn the key to positionLOCK.
OPEN
■ ■■ ■
■Switch operation
1.Push the key inward
and turn counterclock-
wise to position "LOCK",
lock the steering system
and center-stand ;2.If the center-stand is
not in position, you
cannot lock it. Once the
center-stand is in
position, it will be
locked automatically.
3.The key can be
removed.
PARTS LIST AND OPERATION
(2.)
3-3

left handlebar
switches
3 Horn switch
Press this switch to sound the horn.
2 Start switch
To start the engine, press this switch
while holding the front or rear brake
lever.
■ ■■ ■
■Handlebar switches■ ■■ ■
■Left handlebar switchesWhen the light switch in the right
handlebar is positioned to
High beam lights
Low beam lights
■ ■■ ■
■Right handlebar switches1 Light switch
Headlight off.
Position light, rear light, in-
strument light on.
Position light, headlight, rear
light, instrument light on.
right handlebar switches
2 Turn signal switch
Turn the switch to right (R/ ) means
turn right, and turn it to left (L/ )
means turn left. When you release the
switch, it will move back to center
position. To cancel the signal, just
push the switch inward when it's in
center position.
PARTS LIST AND OPERATION
1 Dimmer switch
3-4
1
2
31
2

RUNNING AND OPERATION
1 Start the engine5-1
2 Shut-down the engine and park the motorcycle5-2
3 Engine exhaust5-3

NOTE: If the engine fails to start, release the
start switch, wait for a few seconds,
then try again. Do not crank the en-
gine for more than 5 seconds on any
single attempt preserve battery charge.
If the engine cannot be started by start-
ing motor, try tramping on the kick-
starter.
If the engine still fails to start after the
start switch has be pressed for 4-5
times, turn the throttle grip for 1/8-1/4
of a circle and then press the startswitch again.
■ ■■ ■
■Start the engineNOTE: ·Check the engine before starting.·Check the fuel level.·The motorcycle should be supported
by center-stand.·The side-stand should be in horizon-
tal position.·Operate on the left side of themotorcycle.
ON
1.Turn the key of main switch to posi-
tion ON.
2.Release the throttle grip, press the
start switch to start the engine while
holding the front or rear brake lever.RUNNING AND OPERATION
3.Before starting off, allow the engine
to warm up for 1-3 minutes, which will
maximize the engine's service life.
Never accelerate the motorcycle rap-
idly when the engine is still cold,
otherwise, the accelerating ability will
be reduced.
5-1
1/8
1/4