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KTM RC 125 2019 - User Manual

KTM RC 125 2019
255 pages
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OWNER'S MANUAL 2019
RC 125
Art. no. 3213931en

Table of Contents

Questions and Answers

  • S
    Steven SullivanAug 20, 2025
    How to fix my KTM Motorcycle when the engine turns but does not start?
    • A
      Anna CalhounAug 20, 2025
      If the engine turns but doesn't start, it could be due to an operating error, so ensure you are following the correct start procedure. Alternatively, there may be an error in the electronic fuel injection, so read out the fault memory using the KTM diagnostics tool.
  • T
    Thomas JonesAug 22, 2025
    Why is my KTM RC 125 2019 Motorcycle 12 V battery discharged?
    • R
      Raymond AriasAug 22, 2025
      A discharged 12 V battery might be due to the ignition not being switched off when the vehicle was parked, so charge the battery. It could also be that the alternator isn't charging the battery, so check the charging voltage and the open-circuit current.
  • C
    Christopher HeathAug 25, 2025
    Why does my KTM RC 125 2019 Motorcycle engine not crank when pressing the electric starter?
    • J
      joshuameltonAug 25, 2025
      The engine may fail to crank due to several reasons. It could be an operating error, so ensure you are following the correct start procedure. The 12-V battery might be discharged, requiring a charge. A blown fuse (1, 3, 4, or 7) could also be the cause, so replace the affected fuse. Finally, check the ground connection to ensure it's properly connected.
  • M
    Michael JohnsonAug 27, 2025
    What to do if my KTM RC 125 2019 Motorcycle engine dies during the trip?
    • C
      Christopher SalazarAug 27, 2025
      If your engine dies during a trip, it could be due to a lack of fuel, so refuel your motorcycle. Another potential cause is a blown fuse (1, 3, 4, or 7). In this case, replace the fuse.
  • N
    Nicholas GoodAug 28, 2025
    Why is my KTM RC 125 2019 Motorcycle overheating?
    • K
      Katie RiceAug 28, 2025
      Your KTM Motorcycle may be overheating due to several reasons. There could be too little coolant in the cooling system, so check for leaks and inspect the coolant level in the compensating tank. Radiator fins may be dirty, requiring cleaning. Foam formation in the cooling system can also cause overheating; in this case, drain and refill/bleed the cooling system. A defective thermostat or a blown fuse 5 could also be the cause, so check the thermostat and replace the fuse if necessary. Finally, a defect in the radiator fan system may be the reason, so inspect the radiator fan system.
  • J
    James ClineAug 30, 2025
    Why is the malfunction indicator lamp lighting up yellow on my KTM RC 125 2019 Motorcycle?
    • T
      Theresa WilliamsAug 30, 2025
      A yellow malfunction indicator lamp typically indicates an error in the electronic fuel injection. To address this, use the KTM diagnostics tool to read out the fault memory.
  • N
    Natalie BeardSep 1, 2025
    Why does my KTM RC 125 2019 have high oil consumption?
    • D
      Deborah RodriguezSep 1, 2025
      High oil consumption in your KTM Motorcycle could stem from a few issues. The engine vent hose might be bent, so straighten it or replace it if needed. The engine oil level could be too high, so check and adjust it. Alternatively, the engine oil might be too thin, requiring you to change the engine oil and oil filter and clean the oil screen.
  • T
    Taylor BellSep 3, 2025
    What to do if the ABS warning lamp lights up on my KTM Motorcycle?
    • D
      douglas22Sep 3, 2025
      If the ABS warning lamp illuminates, the ABS fuse may be blown, so replace the ABS fuses. It could also indicate a large difference in wheel speeds between the front and rear wheels; in this case, stop the vehicle, switch off the ignition, and start it again. Finally, it might signal a malfunction in the ABS, requiring you to use the KTM diagnostics tool to read the ABS fault memory.
  • K
    Kenneth TateSep 5, 2025
    Why does my KTM RC 125 2019 engine have too little power?
    • T
      Tina WashingtonSep 5, 2025
      If your KTM Motorcycle engine has too little power, the air filter might be very dirty, so replace it. The fuel filter could also be very dirty, requiring you to check the fuel pressure. An error in the electronic fuel injection could also be the cause, so use the KTM diagnostics tool to read out the fault memory.
  • M
    Michael BellSep 7, 2025
    Why does my KTM RC 125 2019 engine only turn if the clutch lever is drawn?
    • G
      Gary FisherSep 7, 2025
      The engine may only turn when the clutch lever is drawn because the vehicle is in gear. Shift the transmission to neutral. This can also occur if the vehicle is in gear and the side stand is folded out. In this case, shift the transmission to neutral as well.

Summary

Safety Advice

Degrees of Risk and Symbols

Details the different degrees of risk and associated symbols for hazard identification.

Tampering Warning and Safe Operation

Warns against tampering with vehicle systems and provides guidelines for safe riding.

Protective Clothing

Emphasizes the importance of wearing appropriate protective clothing for rider safety.

Controls

Handlebar Controls Overview

Details the clutch lever, hand brake lever, throttle grip, and horn button functions.

Handlebar Switches and Buttons

Explains the operation of light switches, flasher buttons, and turn signal switches.

Starting and Safety Switches

Describes the emergency OFF switch and electric starter button functions.

Shift and Brake Levers

Explains the function and operation of the shift lever and foot brake lever.

Combination Instrument

Indicator Lamps and Warnings

Details various indicator lamps, warning messages, and their meanings.

Shift Speed Adjustment (RPM1 and RPM2)

Guides on adjusting shift speed warning thresholds RPM1 and RPM2 for optimal gear changes.

Preparing for Use

First Use Preparations and Safety

Provides advice on initial preparations, rider fitness, protective gear, and tire choice.

Riding Instructions

Pre-Ride Checks and Maintenance

Lists essential checks and maintenance measures before every trip for roadworthiness.

Starting and Starting Off Procedures

Guides on safely starting the engine and initiating movement from a standstill.

Shifting Gears and Riding Techniques

Explains proper shifting, riding techniques, load alterations, and braking.

Braking System Operation and Safety

Details how to apply brakes, handle weight, road salt, ABS, and engine braking.

Service Schedule

Required Maintenance Tasks

Lists maintenance tasks required at specific intervals (e.g., 1000 km, 7500 km, 15000 km).

Recommended Maintenance Tasks

Lists recommended maintenance tasks at various intervals (e.g., 7500 km, 30000 km, 48 months).

Brake System

Anti-lock Braking System (ABS) Function

Explains the ABS system, its function, and safety warnings related to its operation.

Wheels and Tires

Electrical System

Cooling System

Tuning the Engine

Service Work on the Engine

Engine Oil Level Check

Guides on checking the engine oil level and adding oil if necessary.

Engine Oil and Filter Change

Provides instructions for changing the engine oil, oil filter, and cleaning the oil screen.

Troubleshooting

Engine Starting Issues

Addresses common problems like engine not cranking or not starting.

Engine Performance and Overheating

Troubleshoots issues like low power, overheating, and malfunction indicator lamp.

Technical Data

KTM RC 125 2019 Specifications

General IconGeneral
Displacement124.7 cc
Transmission6-speed
Fuel SystemElectronic Fuel Injection
Seat Height820 mm
TiresFront: 110/70-17, Rear: 150/60-17
Bore x Stroke58 mm x 47.2 mm
ClutchWet, multi-disc
FrameSteel trellis frame
Rear SuspensionWP monoshock
ABSYes
Wheelbase1341 mm
Engine TypeSingle-cylinder, 4-stroke
Power15 hp
Torque12 Nm
BrakesDisc brakes
Front SuspensionWP upside-down fork
Front Brake300 mm disc
Rear Brake230 mm disc
Ignition SystemElectronic

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