2006 YAMAHA CYGNUS 125 check engine

CAUTION:

Before the motorcycle leaving factory,
we have already set the carburetor to
the standard position. Change the set-
ting at random will affect the engine
performance and increase the dis-charge of exhaust gas.■ ■■ ■
■Adjust throttle gripNOTE: Adjust idle speed before adjusting thefree gap of throttle grip.
1.Loose the fixing nut.
2.Turn the adjustor till the clearance
meets specification.
3.Fasten the fixing nut and recheck
the clearance whether meets the stan-
dard clearance. idle speed
adjusting
screw
MAINTENANCE
■ ■■ ■
■Adjust idle speedNOTE: Warm the engine before adjusting theidle speed.
1.Remove the small lid which locates
under the seat.
2.Turn the idle speed adjusting screw.
Turn clockwiseTurn counter-
clockwise
Idle speed
specificationSpeed up
Speed down
1700rpm 50rpm
Clearance: 0.7mm - 0.8mm
Model: C7ER
Clearance specified: 3 - 5mm
Adjusting direction of throttle grip clearance1. Remove the ignition plug to check
the clearance and model.■ ■■ ■
■Check ignition plug
7-7
vehicle idling adjustment
position3-5mm

MAINTENANCE
■ ■■ ■
■Check front forkThe motorcycle shall be securely
supported when being checked, so
that it would not fall over.1.Visual examination
Check the inner tubes for scratches,
damages or oil leakage.
2.Action examination
Pull the motorcycle to a flat place.
a.Hold the handlebar and keep the
motorcycle upright, grasp the front and
rear brake lever to avoid slipping when
checking.
b.Actuate the handlebar up and right
for several times to check the action
of front fork.
CAUTION:

If you find any damage, oil leakage
or malfunction, ask your agency tocheck it.■ ■■ ■
■Check steering systemWorn or loose steering bearings may
cause danger. Place a stand under the
engine to raise the front wheel off
ground. Hold the lower ends of the
front fork and move them forward and
backward. If any free play can be felt,
ask your agency to check it.
WARNING

Make sure that the motorcycle
stands steadily when checking thesteering system to avoid hazard.Fuse specification: 15A
■ ■■ ■
■Replace fuse1.Remove the cover of accumulator.
2.Remove the negative terminal (-) and
positive terminal (+), then you can
take out the fuse.
3.Replace the blown fuse.CAUTION:

Do not use fuses of a higher amper-
age rating than recommended to
avoid extensive damages to the elec-
trical system, which may result infire.
WARNING
7-9

TROUBLE SHOOTING■ ■■ ■
■Engine cannot start1.Whether the main switch locates on
position ON?
2.Is fuel enough? Whether the needle
points within the fuel range (above E
line)?
3.While pressing start switch, do you
hold rear brake lever?
4.While pressing start switch, do you
turn throttle grip? (See references listed
in page 10)
If you have already confirmed the 1-4
procedures, and the motorcycle still
cannot start:
5.Locate the main switch on position
ON, press horn switch, the horn does
not operate means there is possible
fuse failure.
6.If the fuse is good, use kick-starter
to start the engine and seek help from
your agency.
8-1
■ ■■ ■
■Shut-down suddenly while
runningCheck the oil level.
Refuel as soon as possible if the fuel
is not enough.■ ■■ ■
■Lights failureCheck as per following:
1.Whether the main switch locates on
position ON?
2.After starting the engine, check
whether the front headlight and rear
light is on?
3.Can the switches operate well?
4.Press horn switch, does the horn
operate?
The horn operates well means bulb
failure; the horn does not operate
means that there is possible fuse
failure.
The troubles other than listed
above or if you have any
questions, please consult your
agency.