2021 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 an d control functions ... 3-1
Main switch/steering lock............... 3-1
Indicator lights and warning lights............................................ 3-2
Multi-function meter unit ................ 3-4
Handlebar switches ...................... 3-12
Clutch lever .................................. 3-13
Shift pedal .................................... 3-14
Brake lever.................................... 3-14
Brake pedal .................................. 3-14
ABS .............................................. 3-15
Fuel tank cap ................................ 3-16
Fuel ............................................... 3-16
Fuel tank breather hose and overflow hose ............................ 3-18
Catalytic converter ....................... 3-19
Seats ............................................ 3-19
Sidestand ..................................... 3-20
Ignition circuit cut-off system ....... 3-21 For your safety – pre-operation
checks
............................................... 4-1
Operation an d important ri din g
points ................................................. 5-1
Engine break-in ............................... 5-1
Starting the engine .......................... 5-2
Shifting ............................................ 5-3
Tips for reducing fuel consumption ................................ 5-4
Parking ............................................ 5-4
Perio dic maintenance an d
a d justment ........................................ 6-1
Tool kit ............................................ 6-2
Periodic maintenance chart for the emission control system .............. 6-3
General maintenance and lubrication chart ........................... 6-4
Removing and installing cowlings... 6-8
Checking the spark plug ................. 6-9
Canister ......................................... 6-10
Engine oil and oil filter element ..... 6-11
Why Yamalube .............................. 6-13
Coolant.......................................... 6-14
Replacing the air filter element
and cleaning the check hose..... 6-15
Adjusting the engine idling speed ......................................... 6-16
Adjusting the throttle grip free play ............................................ 6-16 Valve clearance............................. 6-17
Tires .............................................. 6-17
Cast wheels .................................. 6-19
Adjusting the clutch lever free
play ............................................ 6-20
Checking the front brake lever free play..................................... 6-21
Adjusting the brake pedal free
play ............................................ 6-21
Brake light switches ..................... 6-22
Checking the front and rear brake pads .......................................... 6-22
Checking the brake fluid level ...... 6-23
Changing the brake fluid .............. 6-24
Drive chain slack........................... 6-25
Cleaning and lubricating the drive chain.......................................... 6-26
Checking and lubricating the cables ........................................ 6-27
Checking and lubricating the
throttle grip and cable ............... 6-27
Checking and lubricating the brake and shift pedals............... 6-27
Checking and lubricating the brake and clutch levers ............. 6-28
Checking and lubricating the
sidestand................................... 6-29
Lubricating the rear suspension ... 6-29
Checking the front fork ................. 6-29
Checking the steering................... 6-30
Checking the wheel bearings ....... 6-30UB5GE2E0.book Page 1 Thursday, July 30, 2020 3:08 PM

Instrument and control functions
3-19
3
EAU13435
Catalytic converterThe exhaust system contains catalytic
converter(s) to reduce harmful exhaust
emissions.
WARNING
EWA10863
The exhaust system is hot after op-
eration. To prevent a fire hazar d or
b urns:
 Do not park the vehicle near
possi ble fire hazard s such as
g rass or other materials that
easily burn.
 Park the vehicle in a place
where ped estrians or chil dren
are not likely to touch the hot
exhaust system.
 Make sure that the exhaust sys-
tem has cooled down before
d oin g any maintenance work.
 Do not allow the en gine to i dle
more than a few minutes. Lon g
i d lin g can cause a b uild-up of
heat.
EAUE3431
SeatsPassen ger seat
To remove the passenger seat1. Remove the plastic cover.
2. Remove the nut and then slide in forward direction to remove the
passenger seat as shown. To install the passenger seat
1. Insert the projections on the front
of the passenger seat into the seat
holders as shown, and then place
the seat in the original position.
1. Plastic cover
1
ZAUE3363
1. Nut
1. Projection
2. Seat holderZAUE3364
1
ZAUE3365
1
2
UB5GE2E0.book Page 19 Thursday, July 30, 2020 3:08 PM

10-1
10
Index
AABS....................................................... 3-15
ABS warning light ................................... 3-3
Air filter element and check hose,
replacing and cleaning ....................... 6-15BBattery .................................................. 6-31
Brake and clutch levers, checking and lubricating........................................... 6-28
Brake and shift pedals, checking and lubricating........................................... 6-27
Brake fluid, changing............................ 6-24
Brake fluid level, checking.................... 6-23
Brake lever............................................ 3-14
Brake light switches ............................. 6-22
Brake pedal .......................................... 3-14
Brake pedal free play, adjusting ........... 6-21CCables, checking and lubricating ......... 6-27
Canister ................................................ 6-10
Care ........................................................ 7-1
Catalytic converter ............................... 3-19
Clutch lever........................................... 3-13
Clutch lever free play, adjusting ........... 6-20
Coolant ................................................. 6-14
Coolant temperature warning light ......... 3-2
Cowlings, removing and installing.......... 6-8DData recording, vehicle........................... 9-2
Diagnostic connector ............................. 9-2
Dimmer/Pass switch............................. 3-13
Drive chain, cleaning and lubricating ... 6-26
Drive chain slack .................................. 6-25
EEngine break-in ...................................... 5-1
Engine idling speed.............................. 6-16
Engine oil and oil filter element ............ 6-11
Engine overheating .............................. 6-37
Engine serial number ............................. 9-1
Engine stop switch............................... 3-13FFront and rear brake pads, checking ... 6-22
Front brake lever free play, checking ... 6-21
Front fork, checking ............................. 6-29
Fuel ...................................................... 3-16
Fuel consumption, tips for reducing ...... 5-4
Fuel tank breather hose and overflow hose ................................................... 3-18
Fuel tank cap........................................ 3-16
Fuses, replacing ................................... 6-32HHandlebar switches ............................. 3-12
High beam indicator light ....................... 3-2
Horn switch .......................................... 3-13IIdentification numbers ........................... 9-1
Ignition circuit cut-off system .............. 3-21
Indicator lights and warning lights ......... 3-2LLicense plate light bulb, replacing ....... 6-34MMain switch/steering lock ...................... 3-1
Maintenance and lubrication, periodic... 6-4
Maintenance, emission control system ................................................. 6-3
Malfunction indicator light (MIL)............. 3-3
Matte color, caution ............................... 7-1 Model label ............................................. 9-1
Multi-function meter unit ........................ 3-4
NNeutral indicator light ............................. 3-2PParking.................................................... 5-4
Part locations.......................................... 2-1RRear suspension, lubricating ................ 6-29SSafety information................................... 1-1
Seats ..................................................... 3-19
Shifting.................................................... 5-3
Shift light ................................................. 3-3
Shift pedal............................................. 3-14
Sidestand.............................................. 3-20
Sidestand, checking and lubricating .... 6-29
Spark plug, checking .............................. 6-9
Specifications ......................................... 8-1
Starting the engine ................................. 5-2
Start switch ........................................... 3-13
Steering, checking ................................ 6-30
Storage ................................................... 7-3
Supporting the motorcycle ................... 6-34TTail/brake light ...................................... 6-33
Throttle grip and cable, checking and
lubricating ........................................... 6-27
Throttle grip free play, adjusting ........... 6-16
Tires ...................................................... 6-17
Tool kit .................................................... 6-2
Troubleshooting .................................... 6-35
Troubleshooting chart........................... 6-36
Turn signal indicator light ....................... 3-2
UB5GE2E0.book Page 1 Thursday, July 30, 2020 3:08 PM