How to Change the Oil in a 2020 KTM 350 XCF-W

Shop parts for a 2020 KTM 350 XCF-W Dirt Bike.

Changing the oil in your 2020 KTM 350 XCF-W is a straightforward but essential part of routine dirt bike maintenance. Regular oil changes keep your engine running smoothly and extend its lifespan, especially with the high-performance demands of off-road riding. This guide, proprietary to MotoSport.com, walks you through every step required for a clean, professional oil change on this specific model, including all tools needed and model-specific tips.

Tools and Supplies Needed

  • Socket wrench set (8mm, 13mm sockets recommended)
  • Torque wrench
  • Oil drain pan
  • Contact cleaner or degreaser
  • Disposable gloves
  • New oil filter (KTM OEM or equivalent for 2020 KTM 350 XCF-W)
  • Fresh engine oil (KTM recommends Motorex Cross Power 4T 10W/50; check your manual for specs)
  • Crush washer (should be replaced each change)
  • Funnel (paper or plastic, to avoid spills)
  • Measuring cup for precise oil fill
  • Shop rags for clean-up
  • Flathead screwdriver (for removing clips or prying carefully)
  • Pliers for oil filter removal if needed

Steps to Change the Oil

  • Warm up the engine: Start the bike and let it idle for a few minutes. Getting the oil warm (but not hot) helps it drain more completely, removing more contaminants from the engine. Turn the engine off before proceeding.
    Call-out: The 350 XCF-W engine's layout is shared across KTM 250/350 four-strokes, so general EXC-F, XCF-W, and FX guides apply to the process.
  • Position the bike and prepare your work area: Place the bike on a stand with the wheels level. Slide your oil drain pan beneath the engine.
  • Remove the skid plate (if equipped): Some models have a stock skid plate. If present, remove it for easier access to the drain bolts.
  • Remove the oil drain bolts: The 2020 KTM 350 XCF-W uses TWO drain bolts to fully empty the engine:
    • One at the bottom center of the engine
    • One on the side engine case
    Use your socket wrench to unbolt each drain plug. Be careful—the oil may be hot. Let the oil drain completely. Inspect each plug and replace the crush washer before reinstalling.
  • Remove and replace the oil filter:
    • Remove the oil filter cover with the appropriate socket.
    • Carefully pull out the old oil filter. Clean the filter cavity with a rag or contact cleaner to remove any debris or old oil.
    Call-out: Unlike some bikes, the KTM 350 has a horizontal oil filter that slides out easily. If stubborn, use pliers gently.
  • Pre-fill the new oil filter (manufacturer recommendation): KTM manuals suggest laying the bike over on its right side and filling the filter cavity approximately 1/3 full of fresh oil before installing the new filter. This prevents a dry start.
  • Install the new filter: Insert the pre-oiled filter into the cavity, ensuring the rubber o-ring is intact and clean. Reinstall the filter cover and tighten to the recommended torque:
    • Oil filter cover: 7.4 Nm (65 in-lb)
    Tip: Always hand-thread bolts at first to avoid cross-threading.
  • Clean the area around the drain plugs and reinstall them: Ensure crush washers are new and bolts are torqued to KTM specs:
    • Main drain plug: 15 Nm (11 ft-lb)
    • Secondary drain plug: 15 Nm (11 ft-lb)
    Use a torque wrench for accuracy.
  • Pour in fresh oil:
    • Remove the oil fill cap.
    • Using a funnel, add oil slowly (approx. 1 liter (1.06 qt) for the 2020 KTM 350 XCF-W).
    • Replace the oil fill cap.
    Call-out: There's a sight glass on the side of the engine–oil should sit in the center of the glass with the bike upright on level ground.
  • Start and run the engine briefly: Let it idle for 1–2 minutes. Shut it off and wait another minute for oil to settle, then recheck the oil level via sight glass and top off if needed.
  • Clean up: Wipe down any spilled oil. Reinstall the skid plate if removed, and properly dispose of the old oil and filter.

2020 KTM 350 XCF-W Model-Specific Tips

  • The 350 XCF-W shares its oiling system and capacity with many KTM 250/350 four-strokes—always confirm the exact oil volume in your owner's manual, as small changes can occur between years.
  • The filter cavity orientation and side cover design mean the area will retain more old oil; leaning the bike or gently rocking it can help expel more of the old fluid during draining.
  • The sight glass is sensitive—wait until the bike is fully cool and upright on level ground before making a final check.
  • Change intervals: KTM recommends every 15 hours of engine operation (more frequent under hard or racing conditions), but casual riders may extend this slightly. Err on the side of caution for better engine health.

Final Checks

  • Double-check all fasteners for proper torque.
  • Verify oil level after a short ride.
  • Keep a maintenance log for your records.

With these steps, tools, and specific details for your 2020 KTM 350 XCF-W, you'll get a clean and professional oil change, maintaining peak performance for every ride.

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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.