2010 YAMAHA YBR125 air condition

SAFETY INFORMATION
1-2
1 due to excessive speed or under-
cornering (insufficient lean angle
for the speed).
Always obey the speed limit and
never travel faster than warrant-
ed by road and traffic conditions.
Always signal before turning or
changing lanes. Make sure that
other motorists can see you.


The posture of the operator and
passenger is important for proper
control.
The operator should keep both
hands on the handlebar and
both feet on the operator foot-
rests during operation to main-
tain control of the motorcycle.
The passenger should always
hold onto the operator, the seat
strap or grab bar, if equipped,
with both hands and keep both
feet on the passenger footrests.
Never carry a passenger unless
he or she can firmly place both
feet on the passenger footrests.


Never ride under the influence of
alcohol or other drugs.


This motorcycle is designed for on-
road use only. It is not suitable for
off-road use.
Protective apparel
The majority of fatalities from motorcy-
cle accidents are the result of head in-
juries. The use of a safety helmet is the
single most critical factor in the preven-
tion or reduction of head injuries.


Always wear an approved helmet.


Wear a face shield or goggles.
Wind in your unprotected eyes
could contribute to an impairment
of vision that could delay seeing a
hazard.


The use of a jacket, heavy boots,
trousers, gloves, etc., is effective in
preventing or reducing abrasions
or lacerations.


Never wear loose-fitting clothes,
otherwise they could catch on the
control levers, footrests, or wheels
and cause injury or an accident.


Always wear protective clothing
that covers your legs, ankles, and
feet. The engine or exhaust sys-
tem become very hot during or af-
ter operation and can cause burns.


A passenger should also observe
the above precautions.
Avoid Carbon Monoxide Poisoning
All engine exhaust contains carbon
monoxide, a deadly gas. Breathing car-
bon monoxide can cause headaches,
dizziness, drowsiness, nausea, confu-
sion, and eventually death.
Carbon Monoxide is a colorless, odor-
less, tasteless gas which may be
present even if you do not see or smell
any engine exhaust. Deadly levels of
carbon monoxide can collect rapidly
and you can quickly be overcome and
unable to save yourself. Also, deadly
levels of carbon monoxide can linger
for hours or days in enclosed or poorly
ventilated areas. If you experience any
symptoms of carbon monoxide poison-
ing, leave the area immediately, get
fresh air, and SEEK MEDICAL TREAT-
MENT.


Do not run engine indoors. Even if
you try to ventilate engine exhaust
with fans or open windows and
doors, carbon monoxide can rap-
idly reach dangerous levels.
U51DE0E0.book Page 2 Monday, November 2, 2009 10:34 AM

FOR YOUR SAFETY – PRE-OPERATION CHECKS
4-2
4
Throttle gripMake sure that operation is smooth.
Check cable free play.
If necessary, have Yamaha dealer adjust cable free play and lubricate cable and
grip housing.6-12, 6-23
Control cablesMake sure that operation is smooth.
Lubricate if necessary.6-22
Drive chainCheck chain slack.
Adjust if necessary.
Check chain condition.
Lubricate if necessary.6-20, 6-22
Wheels and tiresCheck for damage.
Check tire condition and tread depth.
Check air pressure.
Correct if necessary.6-13, 6-15
Shift pedalMake sure that operation is smooth.
Correct if necessary.6-17
Brake pedalMake sure that operation is smooth.
Lubricate pedal pivoting point if necessary.6-24
Brake and clutch leversMake sure that operation is smooth.
Lubricate lever pivoting points if necessary.6-23
Centerstand, sidestandMake sure that operation is smooth.
Lubricate pivots if necessary.6-24
Chassis fastenersMake sure that all nuts, bolts and screws are properly tightened.
Tighten if necessary.—
Instruments, lights, signals
and switchesCheck operation.
Correct if necessary.—
Sidestand switch Check operation of ignition circuit cut-off system.
If system is not working correctly, have Yamaha dealer check vehicle.3-10 ITEM CHECKS PAGE
U51DE0E0.book Page 2 Monday, November 2, 2009 10:34 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-1
6
EAU17241
Periodic inspection, adjustment, and lu-
brication will keep your vehicle in the
safest and most efficient condition pos-
sible. Safety is an obligation of the vehi-
cle owner/operator. The most important
points of vehicle inspection, adjust-
ment, and lubrication are explained on
the following pages.
The intervals given in the periodic
maintenance and lubrication chart
should be simply considered as a gen-
eral guide under normal riding condi-
tions. However, depending on the
weather, terrain, geographical location,
and individual use, the maintenance in-
tervals may need to be shortened.
WARNING
EWA10321
Failure to properly maintain the ve-
hicle or performing maintenance ac-
tivities incorrectly may increase
your risk of injury or death during
service or while using the vehicle. If
you are not familiar with vehicle ser-
vice, have a Yamaha dealer perform
service.
WARNING
EWA15121
Turn off the engine when performing
maintenance unless otherwise
specified.

A running engine has moving
parts that can catch on body
parts or clothing and electrical
parts that can cause shocks or
fires.


Running the engine while ser-
vicing can lead to eye injury,
burns, fire, or carbon monoxide
poisoning – possibly leading to
death. See page 1-1 for more in-
formation about carbon monox-
ide.
EAU17341
Owner’s tool kit The owner’s tool kit is located behind
panel B. (See page 6-6.)
The service information included in this
manual and the tools provided in the
owner’s tool kit are intended to assist
you in the performance of preventive
maintenance and minor repairs. How-
ever, additional tools such as a torque
wrench may be necessary to perform
certain maintenance work correctly.TIPIf you do not have the tools or experi-
ence required for a particular job, have
a Yamaha dealer perform it for you.1. Owner’s tool kit
U51DE0E0.book Page 1 Monday, November 2, 2009 10:34 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-2
6
EAU46871
TIP

The annual checks must be performed every year, except if a kilometer-based maintenance, or for the UK, a
mileage-based maintenance, is performed instead.


From 30000 km (17500 mi), repeat the maintenance intervals starting from 6000 km (3500 mi).


Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technical
skills.
EAU46920
Periodic maintenance chart for the emission control system NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING
ANNUAL
CHECK 1000 km
(600 mi)6000 km
(3500 mi)12000 km
(7000 mi)18000 km
(10500 mi)24000 km
(14000 mi)
1*Fuel lineCheck fuel hoses for cracks or
damage.√√√√√
2 Spark plugCheck condition.
Clean and regap.√√
Replace.√√
3*ValvesCheck valve clearance.
Adjust.√√√√
4*Fuel injectionCheck engine idle speed.√√√√√√
5*Air induction sys-
temCheck the air cut-off valve, reed
valve, and hose for damage.
Replace any damaged parts if
necessary.√√√√√
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-16
6decrease the clutch lever free play,
turn the adjusting nut in direction
(b).
7. Tighten the locknut at the clutch
cable.
8. Tighten the locknut at the clutch le-
ver, and then slide the rubber cov-
er to its original position.
EAUT1221
Checking the front brake lever
free play The brake lever free play should mea-
sure 0.0–7.0 mm (0.00–0.28 in) as
shown. Periodically check the brake le-
ver free play and, if necessary, have a
Yamaha dealer check the brake sys-
tem.
WARNING
EWA10641
An incorrect brake lever free play in-
dicates a hazardous condition in the
brake system. Do not operate the ve-
hicle until the brake system has
been checked or repaired by a
Yamaha dealer.
EAU39812
Adjusting the brake pedal free
play The brake pedal free play should mea-
sure 20.0–30.0 mm (0.79–1.18 in) at
the brake pedal end as shown. Period-
ically check the brake pedal free play
and, if necessary, adjust it as follows.
To increase the brake pedal free play,
turn the adjusting nut at the brake rod in
direction (a). To decrease the brake
pedal free play, turn the adjusting nut in
direction (b).
1. Brake lever free play
1. Brake pedal free play
U51DE0E0.book Page 16 Monday, November 2, 2009 10:34 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-25
6
EAUM1651
Lubricating the swingarm piv-
ots The swingarm pivots must be lubricat-
ed by a Yamaha dealer at the intervals
specified in the periodic maintenance
and lubrication chart.
EAU23272
Checking the front fork The condition and operation of the front
fork must be checked as follows at the
intervals specified in the periodic main-
tenance and lubrication chart.
To check the condition
Check the inner tubes for scratches,
damage and excessive oil leakage.
To check the operation
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion. WARNING! To avoid injury,
securely support the vehicle so
there is no danger of it falling
over.
[EWA10751]
2. While applying the front brake,
push down hard on the handlebars
several times to check if the front
fork compresses and rebounds
smoothly.
NOTICE
ECA10590
If any damage is found or the front
fork does not operate smoothly,
have a Yamaha dealer check or re-
pair it.
Recommended lubricant:
Lithium-soap-based grease
U51DE0E0.book Page 25 Monday, November 2, 2009 10:34 AM

SPECIFICATIONS
8-2
8
5th:
21/24 (0.875)
Chassis:Frame type:
Diamond
Caster angle:
26.33 °
Trail:
92.0 mm (3.62 in)Front tire:Type:
Tubeless
Size:
2.75-18 42P
Manufacturer/model:
CHENG SHIN/C-910Rear tire:Type:
Tubeless
Size:
90/90-18 57P
Manufacturer/model:
CHENG SHIN/C-905Loading:Maximum load:
153 kg (337 lb)
(Total weight of rider, passenger, cargo and
accessories)Tire air pressure (measured on cold
tires):Loading condition:
0–90 kg (0–198 lb)
Front:
175 kPa (1.75 kgf/cm², 25 psi)Rear:
200 kPa (2.00 kgf/cm², 29 psi)
Loading condition:
90–153 kg (198–337 lb)
Front:
175 kPa (1.75 kgf/cm², 25 psi)
Rear:
280 kPa (2.80 kgf/cm², 41 psi)
Front wheel:Wheel type:
Cast wheel
Rim size:
J18M/C x MT1.85Rear wheel:Wheel type:
Cast wheel
Rim size:
J18M/C x MT1.85Front brake:Type:
Single disc brake
Operation:
Right hand operation
Recommended fluid:
DOT 3 or 4Rear brake:Type:
Drum brake
Operation:
Right foot operationFront suspension:Type:
Telescopic forkSpring/shock absorber type:
Coil spring/oil damper
Wheel travel:
120.0 mm (4.72 in)
Rear suspension:Type:
Swingarm
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
105.0 mm (4.13 in)Electrical system:Ignition system:
TCI
Charging system:
AC magnetoBattery:Model:
YTX7L-BS
Voltage, capacity:
12 V, 6.0 AhHeadlight:Bulb type:
Halogen bulbBulb voltage, wattage × quantity:Headlight:
12 V, 35 W/35 W × 1
Tail/brake light:
12 V, 5.0 W/21.0 W × 1
Front turn signal light:
12 V, 10.0 W × 2
Rear turn signal light:
12 V, 10.0 W × 2
U51DE0E0.book Page 2 Monday, November 2, 2009 10:34 AM