2008 YAMAHA YBR125 warning

IMPORTANT MANUAL INFORMATION
EAU10151
Particularly important information is distinguished in this manual by the following notations:NOTE:

This manual should be considered a permanent part of this motorcycle and should remain with it even if the motorcycle
is subsequently sold.


Yamaha continually seeks advancements in product design and quality. Therefore, while this manual contains the most
current product information available at the time of printing, there may be minor discrepancies between your motorcycleand this manual. If you have any questions concerning this manual, please consult your Yamaha dealer.WARNING
EWA10030
PLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY BEFORE OPERATING THIS MOTORCYCLE.
*Product and specifications are subject to change without notice.The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS
INVOLVED!
Failure to follow WARNING instructions could result in severe injury or death
to the
motorcycle operator, a bystander, or a person inspecting or repairing the motor-
cycle.
A CAUTION indicates special precautions that must be taken to avoid damage to
the motorcycle.
A NOTE provides key information to make procedures easier or clearer.
WARNING
CAUTION:
NOTE:
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TABLE OF CONTENTSSAFETY INFORMATION ..................1-1
DESCRIPTION ..................................2-1
Left view ..........................................2-1
Right view ........................................2-2
Controls and instruments.................2-3
INSTRUMENT AND CONTROL
FUNCTIONS.......................................3-1
Main switch/steering lock ................3-1
Indicator and warning lights ............3-2
Speedometer unit ...........................3-2
Tachometer ....................................3-3
Self-diagnosis device ......................3-3
Fuel gauge ......................................3-3
Handlebar switches ........................3-4
Clutch lever .....................................3-5
Shift pedal .......................................3-5
Brake lever .....................................3-5
Brake pedal ....................................3-6
Fuel tank cap ..................................3-6
Fuel .................................................3-7
Catalytic converters ........................3-8
Kickstarter .......................................3-8
Adjusting the shock absorber
assemblies ..................................3-8
Carrier .............................................3-9
Sidestand ........................................3-9
Ignition circuit cut-off system ........3-10PRE-OPERATION CHECKS............. 4-1
Pre-operation check list .................. 4-2
OPERATION AND IMPORTANT
RIDING POINTS................................. 5-1
Starting the engine ......................... 5-1
Shifting ........................................... 5-2
Tips for reducing fuel
consumption ............................... 5-3
Engine break-in .............................. 5-3
Parking ........................................... 5-4
PERIODIC MAINTENANCE AND
MINOR REPAIR................................. 6-1
Owner’s tool kit ............................... 6-1
Periodic maintenance and
lubrication chart .......................... 6-2
Removing and installing panels ..... 6-6
Checking the spark plug ................. 6-7
Engine oil ....................................... 6-9
Cleaning the air filter element ...... 6-10
Checking the engine idling
speed ........................................ 6-12
Adjusting the throttle cable free
play ........................................... 6-12
Valve clearance ............................ 6-13
Tires ............................................. 6-13
Cast wheels .................................. 6-15
Adjusting the clutch lever free
play ........................................... 6-16Checking the front brake lever free
play ........................................... 6-17
Adjusting the brake pedal free
play ........................................... 6-17
Checking the shift pedal .............. 6-18
Adjusting the rear brake light
switch ....................................... 6-18
Checking the front brake pads and
rear brake shoes ...................... 6-19
Checking the front brake fluid
level .......................................... 6-19
Changing the brake fluid .............. 6-20
Drive chain slack .......................... 6-21
Cleaning and lubricating the drive
chain ......................................... 6-22
Checking and lubricating
the cables ................................. 6-23
Checking and lubricating
the throttle grip and cable ......... 6-23
Checking and lubricating
the brake and clutch levers ...... 6-23
Checking and lubricating
the brake pedal ......................... 6-24
Checking and lubricating the
centerstand and sidestand ....... 6-24
Lubricating the swingarm
pivots ........................................ 6-25
Checking the front fork ................. 6-25
Checking the steering .................. 6-26
Checking the wheel bearings ....... 6-26
Battery ......................................... 6-27U27SE0E0.book Page 1 Friday, February 22, 2008 8:54 AM

1-1
1
SAFETY INFORMATION
EAU10281
MOTORCYCLES ARE SINGLE
TRACK VEHICLES. THEIR SAFE USE
AND OPERATION ARE DEPENDENT
UPON THE USE OF PROPER RIDING
TECHNIQUES AS WELL AS THE EX-
PERTISE OF THE OPERATOR. EV-
ERY OPERATOR SHOULD KNOW
THE FOLLOWING REQUIREMENTS
BEFORE RIDING THIS MOTOR-
CYCLE.
HE OR SHE SHOULD:

OBTAIN THOROUGH INSTRUC-
TIONS FROM A COMPETENT
SOURCE ON ALL ASPECTS OF
MOTORCYCLE OPERATION.


OBSERVE THE WARNINGS AND
MAINTENANCE REQUIRE-
MENTS IN THE OWNER’S MAN-
UAL.


OBTAIN QUALIFIED TRAINING
IN SAFE AND PROPER RIDING
TECHNIQUES.


OBTAIN PROFESSIONAL TECH-
NICAL SERVICE AS INDICATED
BY THE OWNER’S MANUALAND/OR WHEN MADE NECES-
SARY BY MECHANICAL CONDI-
TIONS.
Safe riding


Always make pre-operation
checks. Careful checks may help
prevent an accident.


This motorcycle is designed to car-
ry the operator and a passenger.


The failure of motorists to detect
and recognize motorcycles in traf-
fic is the predominating cause of
automobile/motorcycle accidents.
Many accidents have been caused
by an automobile driver who did
not see the motorcycle. Making
yourself conspicuous appears to
be very effective in reducing the
chance of this type of accident.
Therefore:
Wear a brightly colored jacket.
Use extra caution when you are
approaching and passing
through intersections, since in-
tersections are the most likely
places for motorcycle accidents
to occur.Ride where other motorists can
see you. Avoid riding in another
motorist’s blind spot.


Many accidents involve inexperi-
enced operators. In fact, many op-
erators who have been involved in
accidents do not even have a cur-
rent motorcycle license.
Make sure that you are qualified
and that you only lend your
motorcycle to other qualified op-
erators.
Know your skills and limits.
Staying within your limits may
help you to avoid an accident.
We recommend that you prac-
tice riding your motorcycle
where there is no traffic until you
have become thoroughly famil-
iar with the motorcycle and all of
its controls.


Many accidents have been caused
by error of the motorcycle opera-
tor. A typical error made by the op-
erator is veering wide on a turn
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INSTRUMENT AND CONTROL FUNCTIONS
3-1
3
EAU10460
Main switch/steering lock The main switch/steering lock controls
the ignition and lighting systems, and is
used to lock the steering. The various
positions are described below.
EAU33590
ON
All electrical circuits are supplied with
power; the meter lighting, taillight and
auxiliary light come on, and the engine
can be started. The key cannot be re-
moved.NOTE:The headlight comes on automatically
when the engine is started and stays on
until the key is turned to “OFF”, even ifthe engine stalls.
EAU10660
OFF
All electrical systems are off. The key
can be removed.
EAU43140
LOCK
The steering is locked, and all electrical
systems are off. The key can be re-
moved.
To lock the steering1. Turn the handlebars all the way to
the left.
2. Push the key in from the “OFF” po-
sition, and then turn it to “LOCK”
while still pushing it.
3. Remove the key.To unlock the steering
Insert the key and turn it to “OFF”.
WARNING
EWA10060
Never turn the key to “OFF” or
“LOCK” while the vehicle is moving,
otherwise the electrical systems will
be switched off, which may result in
loss of control or an accident. Make
sure that the vehicle is stopped be-
fore turning the key to “OFF” or“LOCK”.
1. Push.
2. Turn.
1. Turn.
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INSTRUMENT AND CONTROL FUNCTIONS
3-2
3
EAU11003
Indicator and warning lights
EAU11020
Turn signal indicator light“”
This indicator light flashes when the
turn signal switch is pushed to the left or
right.
EAU11060
Neutral indicator light“”
This indicator light comes on when the
transmission is in the neutral position.
EAU11080
High beam indicator light“”
This indicator light comes on when the
high beam of the headlight is switched
on.
EAU45740
Engine trouble warning light“”
This warning light comes on or flashes
when an electrical circuit monitoring the
engine is defective. When this occurs,
have a Yamaha dealer check the self-
diagnosis system. (See page 3-3 for an
explanation of the self-diagnosis de-
vice.)
The electrical circuit of the warning light
can be checked by turning the key to
“ON”. If the warning light does not come
on for a few seconds, then go off, have
a Yamaha dealer check the electrical
circuit.
EAU11630
Speedometer unit The speedometer unit is equipped with
a speedometer, an odometer and a
tripmeter. The speedometer shows
riding speed. The odometer shows the
total distance traveled. The tripmeter
shows the distance traveled since it
was last set to zero with the reset knob.
The tripmeter can be used to estimate
the distance that can be traveled with a
full tank of fuel. This information will en-
able you to plan future fuel stops.
1. Turn signal indicator light“”
2. Neutral indicator light“”
3. High beam indicator light“”
4. Engine trouble warning light“”
1
2
3
4
1. Speedometer
2. Odometer
3. Tripmeter
4. Tripmeter reset knob
14
32
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INSTRUMENT AND CONTROL FUNCTIONS
3-3
3
EAU11851
Tachometer The electric tachometer allows the rider
to monitor the engine speed and keep it
within the ideal power range.CAUTION:
ECA10031
Do not operate the engine in the ta-
chometer red zone.Red zone: 10000 r/min and above
EAU12090
Self-diagnosis device This model is equipped with a self-diag-
nosis device for various electrical cir-
cuits.
If any of those circuits are defective, the
engine trouble warning light will come
on or flash. If this occurs, have a
Yamaha dealer check the vehicle.CAUTION:
ECA11170
To prevent engine damage, be sure
to consult a Yamaha dealer as soonas possible if this occurs.
EAU37052
Fuel gauge The fuel gauge indicates the amount of
fuel in the fuel tank. The needle moves
towards “E” (Empty) as the fuel level
decreases. When the needle reaches
the red zone, approximately 3.0 L (0.79
US gal, 0.66 Imp.gal) remain in the fuel
tank. If this occurs, refuel as soon as
possible.NOTE:The main switch must be turned to
“ON” for the fuel gauge to display anaccurate fuel level reading.
1. Tachometer
2. Tachometer red zone
1
2
1. Fuel gauge
2. Red zone
12
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INSTRUMENT AND CONTROL FUNCTIONS
3-4
3
EAU12347
Handlebar switches Left
Right
EAU12400
Dimmer switch“/”
Set this switch to“” for the high
beam and to“” for the low beam.
EAU12460
Turn signal switch“/”
To signal a right-hand turn, push this
switch to“”. To signal a left-hand
turn, push this switch to“”. When re-
leased, the switch returns to the center
position. To cancel the turn signal
lights, push the switch in after it has re-
turned to the center position.
EAU12500
Horn switch“”
Press this switch to sound the horn.
EAU12710
Start switch“”
Push this switch to crank the engine
with the starter.CAUTION:
ECA10050
See page 5-1 for starting instruc-tions prior to starting the engine.
EAU41700
The engine trouble warning light will
come on when the key is turned to “ON”
and the start switch is pushed, but this
does not indicate a malfunction.
1. Dimmer switch“/”
2. Turn signal switch“/”
3. Horn switch“”
1. Start switch“”U27SE0E0.book Page 4 Friday, February 22, 2008 8:54 AM

INSTRUMENT AND CONTROL FUNCTIONS
3-6
3
EAU12941
Brake pedal The brake pedal is on the right side of
the motorcycle. To apply the rear
brake, press down on the brake pedal.
EAU13001
Fuel tank cap To remove the fuel tank cap
Insert the key into the lock and turn it
1/4 turn clockwise. The lock will be re-
leased and the fuel tank cap can be re-
moved.
To install the fuel tank cap
1. Push the fuel tank cap into position
with the key inserted in the lock.
2. Turn the key counterclockwise to
the original position, and then re-
move it.
NOTE:The fuel tank cap cannot be installed
unless the key is in the lock. In addition,
the key cannot be removed if the cap isnot properly installed and locked.
WARNING
EWA11140
Make sure that the fuel tank cap isproperly installed before riding.
1. Brake pedal
1
1. Fuel tank cap
2. Unlock.
12
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