2008 YAMAHA YZF-R125 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 and warning lights ............3-2
Tachometer ....................................3-3
Multi-function display ......................3-3
Handlebar switches ........................3-4
Clutch lever .....................................3-5
Shift pedal .......................................3-6
Brake lever .....................................3-6
Brake pedal ....................................3-6
Fuel tank cap ..................................3-7
Fuel .................................................3-7
Catalytic converters ........................3-8
Rider seat .......................................3-9
Anti-theft device housing ................3-9
Sidestand ......................................3-10
Ignition circuit cut-off system ........3-10
PRE-OPERATION CHECKS..............4-1
Pre-operation check list ..................4-2OPERATION 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 the
cowlings and panel ..................... 6-6
Checking the spark plug ................. 6-8
Engine oil and oil filter element ...... 6-9
Coolant ......................................... 6-12
Replacing the air filter element
and cleaning the check hose .... 6-14
Adjusting the engine idling
speed ........................................ 6-14
Adjusting the throttle cable free
play ........................................... 6-15
Valve clearance ............................ 6-16
Tires ............................................. 6-16
Cast wheels .................................. 6-18
Adjusting the clutch lever free
play ........................................... 6-19Checking the front brake lever
free play .................................... 6-20
Adjusting the brake pedal free
play ........................................... 6-20
Checking the front and rear
brake pads ................................ 6-20
Checking the brake fluid level ...... 6-21
Changing the brake fluid .............. 6-22
Drive chain slack .......................... 6-22
Cleaning and lubricating the
drive chain ................................ 6-24
Checking and lubricating the
cables ....................................... 6-24
Checking and lubricating the
throttle grip and cable ............... 6-25
Checking and lubricating the
brake and shift pedals .............. 6-25
Checking and lubricating the
brake and clutch levers ............ 6-26
Checking and lubricating the
sidestand .................................. 6-26
Lubricating the swingarm
pivots ........................................ 6-27
Checking the front fork ................. 6-27
Checking the steering .................. 6-28
Checking the wheel bearings ....... 6-28
Battery ......................................... 6-29
Replacing the fuses ..................... 6-30
Replacing a headlight bulb .......... 6-31
Tail/brake light ............................. 6-31U5D7E0E0.book Page 1 Tuesday, December 18, 2007 10:13 AM

INSTRUMENT AND CONTROL FUNCTIONS
3-8
3
CAUTION:
ECA10070
Immediately wipe off spilled fuel
with a clean, dry, soft cloth, since
fuel may deteriorate painted surfac-es or plastic parts.
EAU43420
CAUTION:
ECA11400
Use only unleaded gasoline. The use
of leaded gasoline will cause severe
damage to internal engine parts,
such as the valves and piston rings,as well as to the exhaust system.
Your Yamaha engine has been de-
signed to use premium unleaded gaso-
line with a research octane number of
95 or higher. If knocking (or pinging) oc-curs, use a gasoline of a different
brand. Use of unleaded fuel will extend
spark plug life and reduce maintenance
costs.
EAU13442
Catalytic converters This vehicle is equipped with catalytic
converters 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.
Recommended fuel:
PREMIUM UNLEADED GASOLINE
ONLY
Fuel tank capacity:
13.8 L (3.65 US gal) (3.04 Imp.gal)
Fuel reserve amount (when the fuel
level warning indicator comes on):
1.6 L (0.42 US gal) (0.35 Imp.gal)
U5D7E0E0.book Page 8 Tuesday, December 18, 2007 10:13 AM

INDEXAAir filter element and check hose,
replacing and cleaning........................ 6-14
Anti-theft device housing......................... 3-9
Auxiliary light bulb, replacing ................ 6-32BBattery................................................... 6-29
Brake and clutch levers, checking and
lubricating ........................................... 6-26
Brake and shift pedals, checking and
lubricating ........................................... 6-25
Brake fluid, changing ............................ 6-22
Brake fluid level, checking .................... 6-21
Brake lever .............................................. 3-6
Brake pedal ............................................. 3-6
Brake pedal free play, adjusting............ 6-20CCables, checking and lubricating .......... 6-24
Care ........................................................ 7-1
Catalytic converters ................................ 3-8
Clutch lever ............................................. 3-5
Clutch lever free play, adjusting ............ 6-19
Coolant.................................................. 6-12
Coolant temperature warning light .......... 3-2
Cowlings and panel, removing and
installing................................................ 6-6DDimmer switch ........................................ 3-5
Drive chain, cleaning and lubricating .... 6-24
Drive chain slack ................................... 6-22EEngine break-in ....................................... 5-3
Engine idling speed............................... 6-14
Engine oil and oil filter element ............... 6-9Engine stop switch.................................. 3-5
Engine trouble warning light ................... 3-2
FFront and rear brake pads, checking .... 6-20
Front brake lever free play, checking ... 6-20
Front fork, checking .............................. 6-27
Fuel......................................................... 3-7
Fuel consumption, tips for reducing........ 5-3
Fuel tank cap .......................................... 3-7
Fuses, replacing ................................... 6-30HHandlebar switches ................................ 3-4
Headlight bulb, replacing ...................... 6-31
High beam indicator light ........................ 3-2
Horn switch ............................................. 3-5IIdentification numbers ............................ 9-1
Ignition circuit cut-off system ................ 3-10
Indicator and warning lights .................... 3-2KKey identification number ....................... 9-1LLicense plate light bulb, replacing ........ 6-32MMain switch/steering lock........................ 3-1
Matte color, caution ................................ 7-1
Model label ............................................. 9-2
Multi-function display .............................. 3-3NNeutral indicator light .............................. 3-2PParking ................................................... 5-4
Part locations .......................................... 2-1
Pass switch............................................. 3-5Periodic maintenance and lubrication
chart ...................................................... 6-2
Pre-operation check list........................... 4-2
RRider seat ................................................ 3-9SSafety information ................................... 1-1
Shifting .................................................... 5-2
Shift pedal ............................................... 3-6
Sidestand .............................................. 3-10
Sidestand, checking and lubricating...... 6-26
Spark plug, checking ............................... 6-8
Specifications .......................................... 8-1
Starting the engine .................................. 5-1
Start switch.............................................. 3-5
Steering, checking................................. 6-28
Storage.................................................... 7-3
Supporting the motorcycle .................... 6-32
Swingarm pivots, lubricating ................. 6-27TTachometer ............................................. 3-3
Tail/brake light ....................................... 6-31
Throttle cable free play, adjusting ......... 6-15
Throttle grip and cable, checking and
lubricating ........................................... 6-25
Tires ...................................................... 6-16
Tool kit..................................................... 6-1
Troubleshooting .................................... 6-36
Troubleshooting charts.......................... 6-37
Turn signal indicator light ........................ 3-2
Turn signal light bulb, replacing ............ 6-31
Turn signal switch ................................... 3-5VValve clearance..................................... 6-16
U5D7E0E0.book Page 1 Tuesday, December 18, 2007 10:13 AM