2006 YAMAHA CYGNUS 125 maintenance

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

1 SAFE-RIDING AND SAFETY POINTS1
2 MOTORCYCLE INFORMATION2
3 PARTS LIST AND OPERATION3
4 PARTS CONTROL4
5 RUNNING AND OPERATION5
6 PRE-OPERATION CHECKS6
7 MAINTENANCE7
8 TROUBLE SHOOTING8
9 SPECIFICATIONS9CONTENTS

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

MAINTENANCE
1 Periodical maintenance7-1
2 Tool kits7-3
3 Replace engine oil7-3
4 Gear oil7-5
5 Air filter7-5
6 Crankcase filter7-6
7 Adjust mixing ratio7-6
8 Adjust idle speed7-7

MAINTENANCE
9 Adjust throttle grip7-7
10 Check ignition plug7-7
11 Check front/rear brake7-8
12 Check front fork7-9
13 Check steering system7-9
14 Replace fuse7-9
15 Accumulator7-10

Periodical maintenance/lubrication table
MAINTENANCE


Periodical maintenanceSee detailed description and time requirement for the general periodical maintenance of motorcycle and exhaust gas
control system in the "Consumer Manual".
The information supplied in this chapter is some kind of easy maintenance which can be finished by consumer him/
herself. If you are not familiar with the repair and maintenance procedure, ask the agency to finish it.
Items
Air drain*
Ignition plugCheck the clearance, adjust if necessary.
1,500km or 2 months
DescriptionRunning-in
500km
Check the working condition, clean or replace if necessary.
Air filterClean every 1,000km, replace if necessary.
Carburetor*Check idle speed/start operation, adjust if necessary.
Check the fuel tube (or vacuum tube) for crackles or damages, replace if necessary.
Fuel line*
Engine oil
Replace (warming engine before exhausting)
Engine oil filter*
Crankcase filter*
Clean every 1,000km, replace if necessary. Clean, replace if necessary.
Gear oil*Check leakage, replace every 3,000km.Front brake*(dish brake)
Check action/brake fluid leakage, see "Note". Replace if necessary.
Front brake(drum brake)
Check action, replace if necessary.
1,500km or 2 months
At the firstEvery
Check action, replace if necessary.
Lubricate a little. **
Check wearing and damage. Repair if necessary.
Check the fastening/damages of the bearing assembly, replace when there are damages.
Rear brake
Wheel
Wheel bearing* Front shaft
7-1

*: Recommended to be finished by a YAMAHA specified maintenance station.
**: Use lithium grease.
Replace brake fluid:
1.Replace brake fluid when disassembling the main cylinder or cartridge style cylinder. Check the liquid level
in normal condition, re-fuel if necessary.
2.It's recommended that you should replace the oil seals in the main cylinder and cartridge style cylinder
every 2 years.
3.It's recommended to change brake tube every 4 years, or replace it when found crackles.Steering bearing*
Front fork*Rear shock absorber *V belt
Check the fastening degree of bearing assembly, modify and re-lubricate if necessary.**Check action/leakage, repair if necessary.
Check action/leakage, repair if necessary.
Check the wear and damages, replace if necessary.Check the accessories and fasteners in the chassis. Modify if necessary. Accessory/Fastener*
Center/side stand* Check action, repair if necessary.
Items
1,500km or 2 months
DescriptionRunning-in
500km
1,500km or 2 months
At the firstEvery
MAINTENANCECAUTION:
7-2

■ ■■ ■
■Tool kitsService information included in this
manual and the tool kits provided will
help you perform the maintenance and
minor repairs. However, additional
tools such as a torque wrench to fas-
ten the nuts or screws may be neces-
sary for correctly performing certain
maintenance work.
WARNING

Modification without approval of
our company may affect the func-
tion of the motorcycle, and renderhazards.
MAINTENANCE
1.fuel drain plug 2.spring
3.filter screen 4.O-ringCAUTION:

When removing the drain plug, the
spring, the filter screen and O-ring
will fall out, do not lose any of thecomponents.
■ ■■ ■
■Replace engine oil1.Start the engine and warm the
vehicle for a few minutes, then shut
off the engine.
2.Place an oil pan under the engine
to collect the engine oil used.
3.Remove the drain bolt.
7-3
1. tool kits
12
4
1 3