KTM 625 LC4 SUPERCOMPETITION

Questions and Answers

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Amy ShortAug 7, 2025
What to do if my KTM 625 LC4 SUPERCOMPETITION engine gets too hot?
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  Gerald StewartAug 7, 2025
  If your KTM Motorcycle engine is getting too hot, several issues could be the cause. These include insufficient cooling liquid, inadequate airflow, very dirty radiators, foam formation in the cooling system, a bent cooling hose, or a defective thermostat. To fix this: * Refill the cooling liquid and check the cooling system for leaks. * Ensure you're driving briskly to promote airflow. * Clean the radiators with a water jet. * Replace the cooling liquid, using antifreeze liquid with brand name. * Shorten or replace the cooling hose. * Inspect the thermostat and replace it if necessary.
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Austin MillerAug 11, 2025
What to do if KTM 625 LC4 SUPERCOMPETITION Motorcycle engine stops or sputters in carburetor?
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  Toni WrightAug 12, 2025
  If your KTM Motorcycle engine stops or sputters in the carburetor, it could be due to insufficient fuel or uncontrolled air intake. To resolve this, clean and check the fuel system and carburetor. Also, inspect the intake flange and carburetor to ensure they are firmly in place.
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zmorganAug 16, 2025
How to fix KTM 625 LC4 SUPERCOMPETITION engine that will not idle?
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  Rick JohnsonAug 16, 2025
  If your KTM Motorcycle engine is not idling, it could be due to incorrectly adjusted adjusting screws on the carburetor or a faulty ignition system. To resolve this, adjust the carburetor and have the ignition system checked.
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stephanie94Aug 20, 2025
Why my KTM 625 LC4 SUPERCOMPETITION Motorcycle has high oil consumption?
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  Martin JohnsonAug 20, 2025
  High oil consumption in your KTM Motorcycle can stem from a few potential issues: a buckling gearing ventilation hose, an engine oil level that's too high, or motor oil that is too thin (viscosity). Remedy this by dislocating or replacing the non-buckling ventilation hose. Check the engine oil level when the engine is warm and correct if necessary. Consider using a thicker engine oil.
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Jason StephensonAug 25, 2025
What to do if all switched on lamps blown out on KTM Motorcycle?
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  Scott BeckerAug 25, 2025
  If all switched-on lamps are blown out on your KTM Motorcycle, the capacitor or voltage regulator may be faulty. To address this, remove the right side cover and control the connections. Have the capacitor and voltage regulator checked.
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Andrew KingOct 29, 2025
Why my KTM 625 LC4 SUPERCOMPETITION Motorcycle engine will not start?
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  raymond39Oct 29, 2025
  If your KTM Motorcycle engine won't start, several factors could be at play. It might be due to an operating error, such as forgetting to switch on the ignition or emergency OFF switch, not opening the fuel tap, or issues with the choke. Old fuel accumulated in the float chamber, an interrupted fuel supply, or a flooded engine could also be culprits. Other potential causes include a sooty or wet spark plug, incorrect electrode gap, a faulty spark plug or connector, oxidation in the connector from the generator to the ignition coil, a short circuit in the wiring harness, or water in the emergency OFF switch. Additionally, issues with the CDI unit, pulse generator, ignition coil, carburetor, or blocked jets could prevent the engine from starting. To resolve this, ensure the ignition and emer...
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Stephen RoachNov 2, 2025
Why my KTM Motorcycle engine will not reach full power?
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  Randy ChenNov 3, 2025
  If your KTM Motorcycle engine won't reach its full power, several factors could be responsible. These include a partially interrupted fuel supply, a dirty carburetor, a float that isn't tight, or a very dirty air filter. Additionally, a non-tight or deformed exhaust system, insufficient glass fiber yarn in the silencer, a valve gap that's too small, loss of compression due to the hand decompressor having no play, or faulty electronical ignition timing can all contribute to this issue. To address this, begin by cleaning and inspecting the fuel system and carburetor, and replace the float if necessary. Clean or replace the air filter. Inspect the exhaust system for damage and replace the glass fiber yarn in the exhaust silencer. Adjust the valve gap and check the setting of the hand decompre...

Summary

OPERATION INSTRUMENTS

Electronic speedometer

Compression damping of fork

Rebound damping of fork

Compression damping of shock absorber

Rebound damping of shock absorber

GENERAL TIPS AND WARNINGS FOR STARTING THE MOTORCYCLE

Instructions for initial operation

Verify that your KTM dealer performed the PREPARATION OF VEHICLE jobs.

DRIVING INSTRUCTIONS

Check the following before each start

Pre-ride checks to ensure the motorcycle is in perfect mechanical condition.

Starting when the engine is cold

Steps to start the engine when it is cold, including fuel tap, neutral gear, and kickstarter use.

Starting off

How to start moving from a standstill using the clutch and throttle.

Shifting;Riding

Guidance on shifting gears and general riding techniques.

Braking

Stopping and parking

PERIODIC MAINTENANCE SCHEDULE 2002

IMPORTANT RECOMMENDED MAINTENANCE PROCEDURES TO BE PERFORMED BASED ON A SEPARATE SUPPLEMENTARY ORDER

Key maintenance tasks recommended for separate supplementary orders.

VITAL CHECKS AND CARE PROCEDURES TO BE CONDUCTED BY THE OWNER OR THE MECHANIC

MAINTENANCE WORK ON CHASSIS AND ENGINE

Check and adjust steering head bearing

Changing the spring preloading of the shock absorber

Checking chain tension

Correct chain tension

Procedure to adjust chain tension and align the rear wheel.

Chain maintenance

General information about KTM disc brakes

BRAKE PADS

BRAKE FLUID

BRAKE DISCS

Adjusting of free travel at the hand brake lever

Checking of brake fluid level - front brake

Refilling the front brake fluid reservoir *

Checking the front brake pads

Replacing front brake pads *

Changing the basic position of the brake pedal *

Check the rear brake fluid level

Refilling the rear brake fluid reservoir *

Checking the rear brake pads

Replacing the rear brake pads *

Dismounting and mounting the front wheel (625 SC)

Dismounting and mounting the front wheel (625 SC SUPERMOTO)

Dismounting and mounting the rear wheel (625 SC)

Dismounting and mounting the rear wheel (625 SC SUPERMOTO)

Tires, air pressure

Checking spoke tension

Cooling system

Checking the coolant level

Cleaning of air filter *

Draining of float chamber of the carburetor

CARBURETOR - Adjust idling (Keihin-FCR41) *

Adjusting the mixture control screw *

Procedure to adjust the mixture control screw, especially for EXC models.

Checking the float level (float height) *

Adjusting the throttle cable *

Adjusting the clutch cable

Checking the adjustment of the hand decompression release cable *

Engine oil

Checking engine oil level

Changing the engine oil *

Changing and bleeding the microfilter *

Changing oil filter *

TROUBLE SHOOTING

Engine will not start

Troubleshooting steps for when the engine fails to start.

Engine will not reach full power

Engine will not idle

Engine stops or splutters in carburetor

Engine does not rev high

Engine gets too hot

CLEANING

STORAGE

TECHNICAL SPECIFICATIONS - ENGINE

TIGHTENING TORQUES - ENGINE

TECHNICAL SPECIFICATIONS - CHASSIS

TIGHTENING TORQUES - CHASSIS

STANDARD ADJUSTMENT - FORK

STANDARD-ADJUSTMENT - SHOCK ABSORBER

KTM 625 LC4 SUPERCOMPETITION Specifications

General

Engine Type	Single cylinder, 4-stroke
Displacement	625 cc
Transmission	5-speed
Fuel Capacity	11.5 liters
Bore x Stroke	101 x 78 mm
Compression Ratio	11.5:1
Cooling	Liquid-cooled
Rear Brake	Single disc