How to Change the Oil in a 2018 KTM 250XC-W

Shop parts for a 2018 KTM 250XC-W Dirt Bike.

Changing the oil in your 2018 KTM 250XC-W is a crucial maintenance step to keep your engine performing reliably, protect its moving parts, and extend its life. Follow this in-depth, step-by-step guide proprietary to MotoSport.com for a proper oil change, covering needed tools, safety, tips, and model-specific notes.

Tools and Materials Needed

  • Socket set (13mm and 8mm sockets recommended)
  • Torque wrench (to precise manufacturer settings)
  • Drain pan
  • Funnel
  • Rubber gloves (for safety and cleanliness)
  • Rags or paper towels (to wipe oil and tools)
  • Contact cleaner (for final cleanup)
  • Engine oil (0.8 liters, as specified by KTM for this model)
  • New crush washer/sealing washer (recommended for each change)
  • Safety glasses
  • Bike stand (optional but makes work easier)

Step-by-Step Procedure

  1. Warm Up the Engine
    • Start the bike and let it idle for several minutes so the oil thins and drains more thoroughly. DON’T skip this; warm oil evacuates more debris.
    • Always ensure the engine is off and the bike is cool enough to touch before starting the oil change process.
  2. Prepare the Work Area
    • Set the bike upright using a suitable bike stand, or carefully lean it against a stable support.
    • Remove the skid plate (if installed) for clear access to the drain plug.
    • Place a drain pan directly under the engine’s drain bolt.
  3. Remove the Oil Fill Cap
    • Loosening the fill cap (on top/right side of the engine case) before draining helps oil flow out faster and prevents a vacuum inside the case.
  4. Drain the Oil
    • Using a 13mm socket, remove the drain plug on the bottom of the engine. Be careful—oil may be hot.
    • Do not forget the crush washer underneath the bolt. Let the oil drain for at least 5 minutes to ensure complete evacuation.
  5. Clean and Inspect
    • Thoroughly clean the drain plug, especially the magnet tip that collects metallic debris. Minor metallic dust is normal, but chunks or excessive debris could indicate mechanical problems.
    • Check the condition of the removed crush washer. Replace with a new one to prevent leaks.
  6. Reinstall the Drain Plug
    • Insert the drain plug with the new washer. Starter-tighten by hand, then use a torque wrench to tighten to 20 Nm (14.8 ft-lbs) as specified by KTM for this model.
  7. Fill with New Oil
    • Use a funnel to pour in 0.8 liters of fresh oil as specified for the 2018 KTM 250XC-W. Use the oil grade recommended in your owner’s manual for your climate and riding conditions.
    • Check the oil level by removing the level check bolt (8mm, right side). Add oil slowly—stop as soon as you see oil dribbling out the check hole.
  8. Reinstall Oil Fill and Check Bolts
    • Reinstall the oil fill cap and use pliers to “snug” it as KTM recommends to ensure it doesn’t vibrate loose.
    • Tighten the oil level check bolt to 10 Nm.
  9. Clean Up and Inspect
    • Wipe away oil spills from the engine and frame with rags and contact cleaner.
    • Reinstall the skid plate if used.
    • Double-check for leaks around the plug and cap after idling the engine for 1–2 minutes.
  10. Dispose of Used Oil
    • Always dispose of used oil at an authorized recycling center—never dump on the ground or into drains.

2018 KTM 250XC-W Model-Specific Call-Outs

  • This model uses 0.8 liters (800 ml) of transmission oil—overfilling can cause foaming or seal leaks; underfilling risks drivetrain wear. Check the owner’s manual if unsure.
  • Drain plug torque: 20 Nm (14.8 ft-lbs).
  • Oil level check bolt: 8mm head, 10 Nm torque.
  • Crush washer should always be replaced to prevent leaks.
  • Transmission oil and engine oil are the same circuit on this two-stroke; no separate engine oil circuit for the crank/cylinder.
  • Change interval: First change at 5 hours. Thereafter, KTM recommends every 40 hours, or every 10 hours in abusive conditions. More frequent changes benefit hard-ridden bikes.

Pro Tips for Reliable Oil Changes

  • Always use a torque wrench—stripping the alloy case threads from overtightening the plug is surprisingly easy and costly to repair.
  • Let the oil fully drain; rocking the bike gently can help evacuate stubborn oil pockets.
  • Keep records of oil changes for resale value and long-term maintenance tracking.

MotoSport.com is your destination for KTM oil, service parts, and expert advice. For best results, reference your official owner’s manual alongside this guide.

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Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.