maintenance YAMAHA CYGNUS L 2012 Owner's Guide

PERIODIC MAINTENANCE AND ADJUSTMENT
6-28
6 5. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.
6. Install the socket (together with the
bulb) by turning it clockwise.
7. Install the cowling.
EAU37741
Rear turn signal light and
tail/brake light If a rear turn signal light or the tail/brake
light does not come on, have a Yamaha
dealer check its electrical circuit or re-
place the bulb.
EAU45463
Replacing the auxiliary light
bulb If the auxiliary light bulb burns out, re-
place it as follows.
1. Place the vehicle on the center-
stand.
2. Remove cowling B. (See page
6-7.)
3. Remove the auxiliary light bulb
socket (together with the bulb) by
pulling it out.
4. Remove the burnt-out bulb by pull-
ing it out.
5. Insert a new bulb into the socket.
6. Install the socket (together with the
bulb) by pushing it in.1. Auxiliary light bulb
2. Auxiliary light bulb socket
12
U1RSE0E0.book Page 28 Tuesday, October 18, 2011 8:56 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-29
67. Install the cowling.
EAU25861
Troubleshooting Although Yamaha scooters receive a
thorough inspection before shipment
from the factory, trouble may occur dur-
ing operation. Any problem in the fuel,
compression, or ignition systems, for
example, can cause poor starting and
loss of power.
The following troubleshooting chart
represents a quick and easy procedure
for checking these vital systems your-
self. However, should your scooter re-
quire any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the scooter prop-
erly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look like
Yamaha parts, but they are often inferi-
or, have a shorter service life and can
lead to expensive repair bills.
WARNING
EWA15141
When checking the fuel system, do
not smoke, and make sure there are
no open flames or sparks in the ar-
ea, including pilot lights from waterheaters or furnaces. Gasoline or
gasoline vapors can ignite or ex-
plode, causing severe injury or
property damage.
U1RSE0E0.book Page 29 Tuesday, October 18, 2011 8:56 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-30
6
EAU25903
Troubleshooting chart
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.2. Compression
There is compression.
There is no compression.
Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the vehicle.
The engine does not start.
Have a Yamaha dealer
check the vehicle.
The engine does not start.
Check the battery.
Operate the electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and have a Yamaha dealer charge
the battery if necessary.
DryWet
Open the throttle halfway and operate
the electric starter.
U1RSE0E0.book Page 30 Tuesday, October 18, 2011 8:56 AM

INDEXAAcceleration and deceleration................. 5-2
Air filter and V-belt case air filter
elements ............................................. 6-13
Auxiliary light bulb, replacing ................ 6-28BBattery................................................... 6-24
Brake fluid, changing ............................ 6-21
Brake fluid level, checking .................... 6-20
Brake lever, front..................................... 3-5
Brake lever, rear ..................................... 3-5
Brake levers, lubricating........................ 6-22
Brake pads and shoes, checking .......... 6-19
Braking .................................................... 5-2CCables, checking and lubricating .......... 6-21
Care ........................................................ 7-1
Carrier ................................................... 3-11
Catalytic converters ................................ 3-7
Centerstand and sidestand,
checking and lubricating ..................... 6-22
Cowlings and panels,
removing and installing ......................... 6-7DDimmer switch ........................................ 3-4EEngine break-in ....................................... 5-3
Engine idling speed, checking .............. 6-15
Engine oil .............................................. 6-10
Engine serial number .............................. 9-1
Engine trouble warning light.................... 3-3FFinal transmission oil ............................ 6-12
Frame serial number ............................... 9-1Front brake lever free play, checking ... 6-18
Front fork, checking .............................. 6-23
Fuel......................................................... 3-6
Fuel consumption, tips for reducing........ 5-3
Fuel gauge.............................................. 3-4
Fuel tank cap .......................................... 3-5
Fuse, replacing ..................................... 6-26
GGrab bar ............................................... 3-11HHandlebar switches ................................ 3-4
Headlight bulb, replacing ...................... 6-26
Helmet holders ....................................... 3-9
High beam indicator light ........................ 3-2
Horn switch ............................................. 3-4IIdentification numbers ............................ 9-1
Ignition circuit cut-off system ................ 3-12
Indicator lights and warning light ............ 3-2KKeyhole cover ......................................... 3-2
Kickstarter............................................... 3-8LLuggage hook ....................................... 3-11MMain switch/steering lock........................ 3-1
Maintenance and lubrication, periodic .... 6-4
Maintenance, emission control system... 6-3
Matte color, caution ................................ 7-1PParking ................................................... 5-4
Part locations .......................................... 2-1RRear brake lever free play, adjusting .... 6-18Rear turn signal light and
tail/brake light...................................... 6-28
SSafe-riding points .................................... 1-5
Safety information ................................... 1-1
Seat ......................................................... 3-8
Self-diagnosis device .............................. 3-3
Sidestand .............................................. 3-12
Spark plug, checking ............................... 6-9
Specifications .......................................... 8-1
Speedometer unit .................................... 3-3
Starting off ............................................... 5-2
Starting the engine .................................. 5-1
Start switch.............................................. 3-4
Steering, checking................................. 6-24
Storage.................................................... 7-3
Storage compartments ............................ 3-9TThrottle grip and cable,
checking and lubricating ..................... 6-21
Throttle grip free play, checking ............ 6-15
Tires ...................................................... 6-16
Troubleshooting .................................... 6-29
Troubleshooting chart ........................... 6-30
Turn signal indicator light ........................ 3-2
Turn signal light bulb (front),
replacing ............................................. 6-27
Turn signal switch ................................... 3-4VValve clearance..................................... 6-15WWheel bearings, checking ..................... 6-24
Wheels .................................................. 6-17
U1RSE0E0.book Page 1 Tuesday, October 18, 2011 8:56 AM