2011 YAMAHA CYGNUS 125 Owners Manual

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EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
Cleaning the air lter check hoses
1. Check the hoses on the front and
rear side of the air fi lter case for
accumulated dirt or water.ZAUM00**
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1. Air fi lter check hose2. If dirt or water is visible, remove
the hoses, clean them, and then
install them.Cleaning the V-belt case air lter
element
1. Remove the V-belt air fi lter case
cover by removing the screws.
ZAUM00**
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1. V-belt air fi lter case cover2. Remove the fi lter element holder
by removing the screw.ZAUM00**
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1. Air fi lter element holder
3. Pull the air fi lter element out, and
then clean it with solvent. After
cleaning, remove the remain-
ing solvent by squeezing the
element. WARNING! Use only a
dedicated parts cleaning sol-
vent. To avoid the risk of re or
explosion, do not use gasoline
or solvents with a low ash
point.
[EWA10431]
NOTICE:
To avoid
damaging the air lter element,
handle it gently and carefully,
and do not twist it.
[ECA10521]
ZAUM00**
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1. V-belt case air fi lter element4. Apply oil of the recommended
type to the entire surface of
the sponge material, and then
squeeze the excess oil out.
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6-15
EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENTTIPThe air fi lter element should be wet
but not dripping.Recommended oil:
Yamaha foam air fi lter oil or other
quality foam air fi lter oil5. Insert the element into the air fi l-
ter case.
6. Install the fi lter element holder by
installing the screw.
7. Install the V-belt air fi lter case
cover by installing the screws.
EAU21401
Valve clearanceThe valve clearance changes with
use, resulting in improper air-fuel mix-
ture and/or engine noise. To prevent
this from occurring, the valve clear-
ance must be adjusted by a Yamaha
dealer at the intervals specifi ed in the
periodic maintenance and lubrication
chart.
EAU21384
Checking the throttle grip
free playThe throttle grip free play should mea-
sure 3 ~ 5 mm (0.12 ~ 0.20 in) at the
inner edge of the throttle grip. Periodi-
cally check the throttle grip free play
and, if necessary, have a Yamaha
dealer adjust it.ZAUM00**
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1. Throttle cable free play
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6-16
EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
EAUT2142
TiresTo maximize the performance, dura-
bility, and safe operation of your ve-
hicle, note the following points regard-
ing the specifi ed tires.
Tire air pressure
The tire air pressure should be
checked and, if necessary, adjusted
before each ride.
EWA10503
WARNING
Operation of this vehicle with im-
proper tire pressure may cause
severe injury or death from loss of
control.● The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the tempera-
ture of the tires equals the am-
bient temperature).● The tire air pressure must be
adjusted in accordance with
the riding speed and with the
total weight of rider, passen-
ger, cargo, and accessories ap-
proved for this model.
Tire air pressure (measured on cold
tires):
Up to 90 kg (198 lb):
Front:
175 kPa (1.75 kgf/cm
2, 25 psi)
Rear:
200 kPa (2.00 kgf/cm2, 29 psi)
90 kg (198 lb) to maximum load:
Front:
200 kPa (2.00 kgf/cm2, 29 psi)
Rear:
225 kPa (2.25 kgf/cm2, 33 psi)
Maximum load*:
157 kg (346 lb)
*Total weight of rider, passenger,
cargo and accessories
EWA10511
WARNING
Never overload your vehicle. Op-
eration of an overloaded vehicle
could cause an accident.
Tire inspectionZAUM00**
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1. Tire tread depth
2. Tire sidewallThe tires must be checked before
each ride. If the center tread depth
reaches the specifi ed limit, if the tire
has a nail or glass fragments in it, or if
the sidewall is cracked, have a Yama-
ha dealer replace the tire immediately.Minimum tire tread depth (front and
rear):
0.8 mm (0.03 in)TIPThe tire tread depth limits may differ
from country to country. Always com-
ply with the local regulations.
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6-17
EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENTTire information
This model is equipped with tubeless
tires.
After extensive tests, only the tires
listed below have been approved for
this model by Yamaha Motor Co., Ltd.Front tire:
Size:
110/70-12 47L
Manufacturer/model:
CHENG SHIN/C-922N
Rear tire:
Size:
120/70-12 58L
Manufacturer/model:
CHENG SHIN/C-6007
EWA10470
WARNING
● Have a Yamaha dealer replace
excessively worn tires. Besides
being illegal, operating the
vehicle with excessively worn
tires decreases riding stability
and can lead to loss of control.● The replacement of all wheel
and brake related parts, includ-
ing the tires, should be left to
a Yamaha dealer, who has the
necessary professional knowl-
edge and experience.
EAU21962
Cast wheelsTo maximize the performance, dura-
bility, and safe operation of your ve-
hicle, note the following points regard-
ing the specifi ed wheels.● The wheel rims should be
checked for cracks, bends, warp-
age or other damage before each
ride. If any damage is found,
have a Yamaha dealer replace
the wheel. Do not attempt even
the smallest repair to the wheel.
A deformed or cracked wheel
must be replaced.● The wheel should be balanced
whenever either the tire or wheel
has been changed or replaced.
An unbalanced wheel can result
in poor performance, adverse
handling characteristics, and a
shortened tire life.
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6-18
EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
EAU22170
Adjusting the rear brake lever
free playZAUM00**
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1. Rear brake lever free playThe brake lever free play should mea-
sure 10 ~ 20 mm (0.039 ~ 0.079 in) as
shown. Periodically check the brake
lever free play and, if necessary, ad-
just it as follows.
To increase the brake lever free play,
turn the adjusting nut at the brake
shoe plate in direction (a). To de-
crease the brake lever free play, turn
the adjusting nut in direction (b).
ZAUM00**
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(a)(b)
1. Adjusting nut
EWA10650
WARNING
If proper adjustment cannot be ob-
tained as described, have a Yama-
ha dealer make this adjustment.
EAU37913
Checking the brake lever free
playThere should be no free play at the
brake lever end. If there is free play,
have a Yamaha dealer inspect the
brake system.
EWA14211
WARNING
A soft or spongy feeling in the
brake lever can indicate the pres-
ence of air in the hydraulic system.
If there is air in the hydraulic sys-
tem, have a Yamaha dealer bleed
the system before operating the
vehicle. Air in the hydraulic system
will diminish the braking perfor-
mance, which may result in loss of
control and an accident.
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EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
EAU22380
Checking the front brake
pads and rear brake shoesThe front brake pads and the rear
brake shoes must be checked for
wear at the intervals specifi ed in the
periodic maintenance and lubrication
chart.
EAU22420
Front brake padsZAUM00**
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1. Brake pad wear indicator grooveEach front brake pad is provided with
a wear indicator groove, which al-
lows you to check the brake pad wear
without having to disassemble the
brake. To check the brake pad wear,
check the wear indicator groove. If a
brake pad has worn to the point that
the wear indicator groove has almost disappeared, have a Yamaha dealer
replace the brake pads as a set.
EAU22540
Rear brake shoesZAUM00**
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1. Wear indicator
2. Wear limit lineThe rear brake is provided with a wear
indicator, which allows you to check
the brake shoe wear without having to
disassemble the brake. To check the
brake shoe wear, check the position
of the wear indicator while applying
the brake. If a brake shoe has worn
to the point that the wear indicator
reaches the wear limit line, have a
Yamaha dealer replace the brake
shoes as a set.
EAU32344
Checking the brake uid levelZAUM00**
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1. Minimum level markInsuffi cient brake fl uid may allow air
to enter the brake system, possibly
causing it to become ineffective.
Before riding, check that the brake
fl uid is above the minimum level mark
and replenish if necessary. A low
brake fl uid level may indicate worn
brake pads and/or brake system leak-
age. If the brake fl uid level is low, be
sure to check the brake pads for wear
and the brake system for leakage.
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6-20
EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
Observe these precautions:● When checking the fl uid level,
make sure that the top of the
master cylinder is level by turning
the handlebars.● Use only the recommended qual-
ity brake fl uid, otherwise the
rubber seals may deteriorate,
causing leakage and poor braking
performance.Recommended brake uid:
DOT 4● Refi ll with the same type of brake
fl uid. Mixing fl uids may result in
a harmful chemical reaction and
lead to poor braking performance.● Be careful that water does not en-
ter the master cylinder when refi ll-
ing. Water will signifi cantly lower
the boiling point of the fl uid and
may result in vapor lock.● Brake fl uid may deteriorate
painted surfaces or plastic parts.
Always clean up spilled fl uid im-
mediately.● As the brake pads wear, it is normal for the brake fl uid level to
gradually go down. However, if
the brake fl uid level goes down
suddenly, have a Yamaha dealer
check the cause.
EAU22721
Changing the brake uidHave a Yamaha dealer change the
brake fl uid at the intervals specifi ed in
the TIP after the periodic maintenance
and lubrication chart. In addition, have
the oil seals of the brake master cyl-
inder and caliper as well as the brake
hose replaced at the intervals listed
below or whenever they are damaged
or leaking.● Oil seals: Replace every two
years.● Brake hose: Replace every four
years.
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EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
EAU43641
Lubricating the front and rear
brake leversZAUM00**ZAUM00**
The pivoting points of the front and
rear brake levers must be lubricated
at the intervals specifi ed in the period-
ic maintenance and lubrication chart.
EAU23095
Checking and lubricating the
cablesThe operation of all control cables
and the condition of the cables should
be checked before each ride, and
the cables and cable ends should be
lubricated if necessary. If a cable is
damaged or does not move smoothly,
have a Yamaha dealer check or re-
place it.
WARNING! Damage to the outer
housing of cables may result in
internal rusting and cause inter-
ference with cable movement.
Replace damaged cables as soon
as possible to prevent unsafe
conditions.
[EWA10711]
Recommended lubricant:
Yamaha Chain and Cable Lube or
engine oil
EAU23114
Checking and lubricating the
throttle grip and cableThe operation of the throttle grip
should be checked before each ride.
In addition, the cable should be lubri-
cated by a Yamaha dealer at the inter-
vals specifi ed in the periodic mainte-
nance chart.
The throttle cable is equipped with a
rubber cover. Make sure that the cov-
er is securely installed. Even though
the cover is installed correctly, it does
not completely protect the cable from
water entry. Therefore, use care not to
pour water directly onto the cover or
cable when washing the vehicle. If the
cable or cover becomes dirty, wipe
clean with a moist cloth.
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