KTM 250 EXC-F 2021 - User Manual

Other manuals for KTM 250 EXC-F 2021

Questions and Answers

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Ryan DavisAug 15, 2025
What to do if my KTM 250 EXC-F 2021 Motorcycle engine turns over but doesn't start?
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  David GarzaAug 15, 2025
  If your KTM Motorcycle engine turns over but doesn't start, possible causes include an operating error (ensure you're following the correct start procedure), a disconnected quick release coupling (join it), a blown fuse 1 or fuse 4 (replace the fuse), an incorrectly set idle speed (adjust it), a spark plug that is oily or wet (clean and dry it, or replace it if necessary), a spark plug gap that is too wide (adjust the plug gap to 1.0 mm (0.039 in)). Also, the ignition system may be defective (check it), there may be a short-circuit cable in the wiring harness, or an error in the electronic fuel injection.
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garnerderrickAug 18, 2025
Why does my KTM 250 EXC-F 2021 engine have so little power?
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  Aaron JonesAug 18, 2025
  If your KTM Motorcycle engine has too little power, several factors could be responsible. The air filter might be heavily contaminated (clean the air filter and air filter box), the fuel filter or fuel screen could be very dirty (change the fuel filter or fuel screen), there might be an error in the electronic fuel injection, the exhaust system could be leaky or deformed, or there could be too little glass fiber yarn filling in the main silencer (check the exhaust system for damage and change the glass fiber yarn filling in the main silencer). Also, the valve clearance might be too little, so you may need to adjust it.
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Steven RiosAug 21, 2025
What to do if my KTM 250 EXC-F 2021 engine dies while riding?
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  Kimberly GarciaAug 21, 2025
  If your KTM Motorcycle engine dies during the trip, consider these possible causes: lack of fuel (refuel), a blown fuse 1 (change the fuses of individual power consumers), or a blown fuse 4 (change the fuses of individual power consumers).
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Melissa HintonAug 25, 2025
Why won't my KTM Motorcycle engine speed up?
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  James WilsonAug 25, 2025
  If your KTM Motorcycle engine does not speed up, it could be due to an error in the electronic fuel injection. Another possible cause is a defective ignition system. Ignition coil, spark plug connector, and the stator winding of the alternator should be checked.
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Jason YangAug 28, 2025
Why is my KTM 250 EXC-F 2021 Motorcycle using so much oil?
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  ethandixonAug 28, 2025
  High oil consumption in your KTM Motorcycle could be due to several reasons. The engine vent hose might be bent (route it without bends or replace it), the engine oil level might be too high (check it), the engine oil might be too thin (change the engine oil and oil filter, and clean the oil screen), or the piston and cylinder might be worn (measure the piston/cylinder mounting clearance).
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Shannon LewisAug 31, 2025
Why won't my KTM 250 EXC-F 2021 engine crank?
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  Melanie SmithAug 31, 2025
  There are several reasons why your KTM Motorcycle engine won't crank. It could be due to an operating error, so ensure you're following the correct start procedure. Other potential causes include a discharged 12-V battery (charge it, and check the charging voltage, open-circuit current, and stator winding of the alternator), a blown main fuse (replace it), a defective starter relay (check it), or a defective starter motor (check it).
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stevendavenportSep 3, 2025
How to stop my KTM 250 EXC-F 2021 Motorcycle from overheating?
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  William DavisSep 4, 2025
  If your KTM Motorcycle engine is overheating, check the following: * Coolant level: Low coolant level in the cooling system may be the cause. Check for leaks and ensure the coolant level is correct. * Airflow: Ensure sufficient airflow, and switch off the engine when stationary. * Radiator fins: Clean radiator fins if they are very dirty. * Coolant: Drain and refill the coolant if there is foam formation in the cooling system. * Radiator hose: Replace the radiator hose if it is bent. * Thermostat: Check the thermostat. * Radiator fan system: Check the radiator fan fuse and the radiator fan itself.
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Deborah DuncanSep 7, 2025
What does it mean when the malfunction indicator lamp lights up on my KTM 250 EXC-F 2021 Motorcycle?
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  Micheal ShawSep 7, 2025
  If the malfunction indicator lamp lights up or flashes on your KTM Motorcycle, it indicates an error in the electronic fuel injection. Check the wiring for damage and electrical plug-in connectors for corrosion and damage.
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ashleystewartSep 12, 2025
Why are the values in the combination instrument deleted on my KTM 250 EXC-F 2021?
- V
  vbrooksSep 12, 2025
  The values in the combination instrument are deleted because the combination instrument battery is empty. Replace the combination instrument battery.

KTM 250 EXC-F 2021 Specifications

General

Bore x Stroke	78 mm x 52.3 mm
Transmission	6-speed
Seat Height	950 mm
Front Suspension	WP Xplor 48
Rear Suspension	WP Xplor PDS
Brakes	Disc brakes
Cooling	Liquid cooled
Engine Type	Single-cylinder, 4-stroke
Displacement	249.9 cc
Fuel System	Electronic Fuel Injection
Fuel Tank Capacity	9.5 L
Fuel System Details	Keihin EFI, 42 mm Throttle Body
Rear Suspension Type	WP XPLOR shock absorber with PDS
Tires	21" front, 18" rear
Front Suspension Type	WP XPLOR USD Fork, Ø 48 mm