2006 YAMAHA YBR125 catalytic converter

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 lights ................................3-2
Speedometer unit ...........................3-2
Tachometer ....................................3-3
Fuel gauge ......................................3-3
Handlebar switches ........................3-3
Clutch lever .....................................3-4
Shift pedal .......................................3-4
Brake lever .....................................3-5
Brake pedal ....................................3-5
Fuel tank cap ..................................3-5
Fuel .................................................3-6
Catalytic converter ..........................3-7
Fuel cock ........................................3-7
Starter (choke) lever .......................3-8
Kickstarter .......................................3-9
Adjusting the shock absorber
assemblies ..................................3-9
Carrier ...........................................3-10
Luggage strap holders ..................3-10
Starting circuit cut-off system .......3-10PRE-OPERATION CHECKS............. 4-1
Pre-operation check list .................. 4-2
OPERATION AND IMPORTANT
RIDING POINTS................................. 5-1
Starting a cold engine .................... 5-1
Starting a warm engine .................. 5-2
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 the
cowling and panels ..................... 6-5
Checking the spark plug ................. 6-8
Engine oil ....................................... 6-9
Cleaning the air filter element ...... 6-11
Adjusting the carburetor ............... 6-12
Adjusting the engine idling
speed ........................................ 6-13
Adjusting the throttle cable free
play ........................................... 6-13
Valve clearance ............................ 6-14
Tires ............................................. 6-14
Cast wheels .................................. 6-16Adjusting the clutch lever
free play .................................... 6-17
Checking the front brake lever
free play .................................... 6-18
Adjusting the brake pedal
free play .................................... 6-18
Adjusting the rear brake light
switch ....................................... 6-19
Checking the front brake pads
and rear brake shoes ............... 6-20
Checking the front brake fluid
level .......................................... 6-20
Changing the brake fluid .............. 6-21
Drive chain slack .......................... 6-22
Cleaning and lubricating the drive
chain ......................................... 6-23
Checking and lubricating the
cables ....................................... 6-24
Checking and lubricating the
throttle grip and cable ............... 6-24
Checking and lubricating the
brake and shift pedals .............. 6-24
Checking and lubricating the
brake and clutch levers ............ 6-25
Checking and lubricating the
centerstand ............................... 6-26
Lubricating the swingarm
pivots ........................................ 6-26
Checking the front fork ................. 6-26
Checking the steering .................. 6-27
Checking the wheel bearings ....... 6-28U3D9E0E0.book Page 1 Saturday, December 25, 2004 11:35 AM

INSTRUMENT AND CONTROL FUNCTIONS
3-7
3 or premium unleaded fuel. Use of un-
leaded fuel will extend spark plug life
and reduce maintenance costs.
EAU13431
Catalytic converter This model is equipped with a catalytic
converter in the exhaust system.
WARNING
EWA10860
The exhaust system is hot after op-
eration. Make sure that the exhaust
system has cooled down before do-ing any maintenance work.CAUTION:
ECA10700
The following precautions must be
observed to prevent a fire hazard or
other damages.

Use only unleaded gasoline.
The use of leaded gasoline will
cause unrepairable damage to
the catalytic converter.


Never park the vehicle near pos-
sible fire hazards such as grass
or other materials that easily
burn.


Do not allow the engine to idletoo long.
EAU37210
Fuel cock The fuel cock supplies fuel from the
tank to the carburetor while filtering it al-
so.NOTE:Depending on the model, the positions
indicated on the fuel cock differ asshown in the following illustrations.
The fuel cock has three positions:
“OFF” or “”
With the lever in this position, fuel will
not flow. Always return the lever to this
position when the engine is not running.1. Arrow mark pointing to “OFF” or “”
U3D9E0E0.book Page 7 Saturday, December 25, 2004 11:35 AM

INDEXAAir filter element, cleaning..................... 6-11
Auxiliary light bulb, replacing ................ 6-33BBattery................................................... 6-28
Brake and clutch levers, checking and
lubricating ........................................... 6-25
Brake and shift pedals, checking and
lubricating ........................................... 6-24
Brake fluid, changing ............................ 6-21
Brake fluid level, checking .................... 6-20
Brake lever .............................................. 3-5
Brake pads and shoes, checking .......... 6-20
Brake pedal ............................................. 3-5
Brake pedal free play, adjusting............ 6-18CCables, checking and lubricating .......... 6-24
Carburetor, adjusting ............................ 6-12
Care ........................................................ 7-1
Carrier ................................................... 3-10
Catalytic converter .................................. 3-7
Centerstand, checking and
lubricating ........................................... 6-26
Clutch lever ............................................. 3-4
Clutch lever free play, adjusting ............ 6-17
Cowling and panels, removing and
installing................................................ 6-5DDimmer switch ........................................ 3-4
Drive chain, cleaning and lubricating .... 6-23
Drive chain slack ................................... 6-22EEngine break-in ....................................... 5-3
Engine idling speed............................... 6-13Engine oil ................................................ 6-9
Engine, starting a warm .......................... 5-2
FFront brake lever free play,
checking ............................................. 6-18
Front fork, checking .............................. 6-26
Fuel......................................................... 3-6
Fuel cock ................................................ 3-7
Fuel consumption, tips for reducing........ 5-3
Fuel gauge.............................................. 3-3
Fuel tank cap .......................................... 3-5
Fuse, replacing ..................................... 6-30HHandlebar switches ................................ 3-3
Headlight bulb, replacing ...................... 6-31
High beam indicator light ........................ 3-2
Horn switch ............................................. 3-4IIdentification numbers ............................ 9-1
Indicator lights ........................................ 3-2KKey identification number ....................... 9-1
Kickstarter............................................... 3-9LLuggage strap holders .......................... 3-10MMain switch/steering lock........................ 3-1
Model label ............................................. 9-2NNeutral indicator light .............................. 3-2PParking ................................................... 5-4
Part locations .......................................... 2-1Periodic maintenance and lubrication
chart ...................................................... 6-2
Pre-operation check list........................... 4-2
RRear brake light switch, adjusting ......... 6-19SSafety information ................................... 1-1
Shifting .................................................... 5-2
Shift pedal ............................................... 3-4
Shock absorber assemblies, adjusting.... 3-9
Spark plug, checking ............................... 6-8
Specifications .......................................... 8-1
Speedometer unit .................................... 3-2
Starter (choke) lever................................ 3-8
Starting a cold engine ............................. 5-1
Starting circuit cut-off system ................ 3-10
Start switch.............................................. 3-4
Steering, checking................................. 6-27
Storage.................................................... 7-3
Swingarm pivots, lubricating ................. 6-26TTachometer ............................................. 3-3
Tail/brake light bulb, replacing .............. 6-32
Throttle cable free play, adjusting ......... 6-13
Throttle grip and cable, checking and
lubricating ........................................... 6-24
Tires ...................................................... 6-14
Tool kit..................................................... 6-1
Troubleshooting .................................... 6-37
Troubleshooting chart ........................... 6-38
Turn signal indicator lights ...................... 3-2
Turn signal light bulb, replacing ............ 6-33
Turn signal switch ................................... 3-4
U3D9E0E0.book Page 1 Saturday, December 25, 2004 11:35 AM