2000 YAMAHA CYGNUS 125 maintenance

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PERIODIC MAINTENANCE AND MINOR REPAIR
EAU21400
Adjusting the valve clearanceThe valve clearance changes with use,
resulting in improper air-fuel mixture and/
or engine noise. To prevent this from
occurring, the valve clearance must be
adjusted by a Yamaha dealer at the in-
tervals specified in the periodic mainte-
nance and lubrication chart.
EAU21370
Adjusting the throttle cable
free playThe throttle cable free play should mea-
sure 3~5 mm (0.12~0.20 in) at the
throttle grip. Periodically check the
throttle cable free play and, if necessary,
adjust it as follows.NOTE:
The engine idling speed must be cor-
rectly adjusted before checking and ad-
justing the throttle cable free play.1. Loosen the locknut.
2. To increase the throttle cable free
play, turn the adjusting nut in direc-
tion (a). To decrease the throttle
cable free play, turn the adjusting
nut in direction (b).
ZAUM00**
1
2
(a)
(b)
1. Locknut
1. Adjusting nut3. Tighten the locknut.
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PERIODIC MAINTENANCE AND MINOR REPAIR
EAU33600
TiresTo maximize the performance, durabil-
ity, and safe operation of your vehicle,
note the following points regarding the
specified tires.
Tire air pressure
The tire air pressure should be checked
and, if necessary, adjusted before each
ride.
EWA10500
w8 88 8
8The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the temperature
of the tires equals the ambient
temperature).
8 88 8
8The tire air pressure must be
adjusted in accordance with the
riding speed and with the total
weight of rider, passenger, cargo,
and accessories approved for this
model.
Tire air pressure (measured on cold
tires):
0~90 kg (0~198 lb):
Front:
175 kPa (26 psi) (1.75 kgf/cm
2)
Rear:
200 kPa (29 psi) (2.0 kgf/cm2)
90~170 kg (198~419 lb) to maxi-
mum load:
Front:
200 kPa (29 psi) (2.0 kgf/cm2)
Rear:
225 kPa (33 psi) (2.25 kgf/cm2)
Maximum load*:
170 kg (374 lb)
* Total weight of rider, passenger,
cargo and accessories
EWA11200
wBecause loading has an enormous
impact on the handling, braking, per-
formance and safety characteristics
of your vehicle, you should keep the
following precautions in mind.
8 88 8
8NEVER OVERLOAD THE VE-
HICLE! Operation of an over-
loaded motorcycle may result in
tire damage, loss of control, orsevere injury. Make sure that the
total weight of rider, passenger,
cargo, and accessories does not
exceed the specified maximum
load for the vehicle.
8 88 8
8Do not carry along loosely
packed items, which can shift
during a ride.
Securely pack the heaviest items
close to the center of the vehicle
and distribute the weight evenly
on both sides.
8 88 8
8Adjust the tire air pressure with
regard to the load.
Check the tire condition and air
pressure before each ride.
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PERIODIC MAINTENANCE AND MINOR REPAIRTire 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 specified limit, if the tire has a nail
or glass fragments in it, or if the sidewall
is cracked, have a Yamaha dealer re-
place the tire immediately.
Minimum tire tread depth (front and
rear):
1.6 mm (0.06 in)NOTE:
The tire tread depth limits may differ
from country to country. Always comply
with the local regulations.
Tire information
This model is equipped with tubeless
tires.
Front tire:
Size:
110 / 70-12 47L
Manufacturer/model:
CHENG SHIN
Rear tire:
Size:
120 / 70-12 58L
Manufacturer/model:
CHENG SHIN
EWA10470
w8 88 8
8Have a Yamaha dealer replace
excessively worn tires. Besides
being illegal, operating the ve-
hicle with excessively worn tires
decreases riding stability and
can lead to loss of control.
8 88 8
8The replacement of all wheel and
brake related parts, including the
tires, should be left to a Yamaha
dealer, who has the necessaryprofessional knowledge and ex-
perience.
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PERIODIC MAINTENANCE AND MINOR REPAIR
EAU21960
Cast wheelsTo maximize the performance, durabil-
ity, and safe operation of your motor-
cycle, note the following points regard-
ing the specified wheels.
8The wheel rims should be checked
for cracks, bends or warpage be-
fore each ride. If any damage is
found, have a Yamaha dealer re-
place the wheel. Do not attempt
even the smallest repair to the
wheel. A deformed or cracked wheel
must be replaced.
8The 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.
8Ride at moderate speeds after
changing a tire since the tire sur-
face must first be “broken in” for it
to develop its optimal characteris-
tics.
EAUT1220
Checking the front brake lever
free play
1
ZAUM01071. Brake lever free playThe brake lever free play should mea-
sure 3~5 mm (0.12~0.2 in) as shown.
Periodically check the brake lever free
play and, if necessary, have a Yamaha
dealer check the brake system.
EWA10640
wAn incorrect brake lever free play in-
dicates a hazardous condition in the
brake system. Do not operate the
motorcycle until the brake system hasbeen checked or repaired by a
Yamaha dealer.
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6-18
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PERIODIC MAINTENANCE AND MINOR REPAIR
EAU22170
Adjusting the rear brake lever
free play1ZAUM01081. Brake lever free playThe brake lever free play should mea-
sure 10~20 mm (0.4~0.8 in) as shown.
Periodically check the brake lever free
play and, if necessary, adjust it as fol-
lows.
To increase the brake lever free play,
turn the adjusting nut at the brake shoe
plate in direction (a). To decrease the
brake lever free play, turn the adjusting
nut in direction (b).
1
(a)(b)
ZAUM03201. Adjusting nut
EWA10650
wIf proper adjustment cannot be ob-
tained as described, have a Yamaha
dealer make this 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 specified in the periodic main-
tenance and lubrication char t.
EAU22420
Front brake padsZAUM00**
1
1. Brake pad wear indicator grooveEach front brake pad is provided with a
wear indicator groove, which allows 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
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PERIODIC MAINTENANCE AND MINOR REPAIR
EAU22540
Rear brake shoes
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ZAUM00591. 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 dis-
assemble 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. groove has almost disappeared, have a
Yamaha dealer replace the brake pads
as a set.
EAU32341
Checking the brake fluid levelZAUM00**
1
1. MInimum level markInsufficient brake fluid may allow air to
enter the brake system, possibly caus-
ing it to become ineffective.
Before riding, check that the brake fluid
is above the minimum level mark and
replenish if necessary. A low brake fluid
level may indicate worn brake pads and/
or brake system leakage. If the brake
fluid level is low, be sure to check the
brake pads for wear and the brake sys-
tem for leakage.
Observe these precautions:8When checking the fluid level, make
sure that the top of the master cyl-
inder is level by turning the handle-
bars.
8Use only the recommended quality
brake fluid, otherwise the rubber
seals may deteriorate, causing
leakage and poor braking perfor-
mance.
Recommended brake fluid:
DOT 4
8Refill with the same type of brake
fluid. Mixing fluids may result in a
harmful chemical reaction and lead
to poor braking performance.
8Be careful that water does not en-
ter the master cylinder when refill-
ing. Water will significantly lower the
boiling point of the fluid and may
result in vapor lock.
8Brake fluid may deteriorate painted
surfaces or plastic parts. Always
clean up spilled fluid immediately.
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PERIODIC MAINTENANCE AND MINOR REPAIR8As the brake pads wear, it is nor-
mal for the brake fluid level to
gradually go down. However, if the
brake fluid level goes down sud-
denly, have a Yamaha dealer check
the cause.
EAU22720
Changing the brake fluidHave a Yamaha dealer change the brake
fluid at the intervals specified in the
NOTE after the periodic maintenance
and lubrication chart. In addition, have
the oil seals of the brake master cylin-
der and caliper as well as the brake hose
replaced at the intervals listed below or
whenever they are damaged or leaking.
8Oil seals: Replace every two years.
8Brake hose: Replace every four
years.
EAU23100
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 lubri-
cated if necessary. If a cable is dam-
aged or does not move smoothly, have
a Yamaha dealer check or replace it.
Recommended lubricant:
Engine oil
EWA10720
wDamage to the outer sheath may in-
terfere with proper cable operation
and will cause the inner cable to rust.
Replace a damaged cable as soon as
possible to prevent unsafe condi-
tions.
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PERIODIC MAINTENANCE AND MINOR REPAIR
EAU23110
Checking and lubricating the
throttle grip and cableThe operation of the throttle grip should
be checked before each ride. In addi-
tion, the cable should be lubricated or
replaced at the intervals specified in the
periodic maintenance chart.
EAU23170
Lubricating the front and rear
brake leversZAUM00**The pivoting points of the front and rear
brake levers must be lubricated at the
intervals specified in the periodic main-
tenance and lubrication chart.
Recommended lubricant:
Lithium-soap-based grease (all-pur-
pose grease)
EAU23210
Checking and lubricating the
centerstand and sidestandZAUM00**The operation of the centerstand and
sidestand should be checked before
each ride, and the pivots and metal-to-
metal contact surfaces should be lubri-
cated if necessary.
EWA10740
wIf the centerstand or sidestand does
not move up and down smoothly,
have a Yamaha dealer check or repair
it.
Recommended lubricant:
Lithium-soap-based grease (all-pur-
pose grease)
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