How to Change the Oil in a 2015 KTM 350 XCF-W

Shop parts for a 2015 KTM 350 XCF-W Dirt Bike.

A regular oil change is essential for keeping your 2015 KTM 350 XCF-W running strong. This step-by-step guide will walk you through exactly how to perform this maintenance task. While the oil change process is shared across many 350cc KTM four-stroke models from 2012–2016, there are model-specific callouts to keep your service clean, fast, and safe for your 2015 KTM 350 XCF-W.

Tools and Supplies Needed

  • 13 mm socket (for the main drain plug)
  • 8 mm socket (for some side cover bolts and screens, if equipped)
  • Oil drain pan
  • New oil filter (OEM preferred)
  • Replacement crush washers (optional but recommended)
  • Fresh engine oil (approximately 1 liter of 10W-50 full synthetic)
  • Measuring cup (for accurate refilling)
  • Paper or plastic funnel
  • Contact cleaner (for spill cleanup)
  • Torque wrench (for reinstalling drain bolts and covers)
  • Shop rags or paper towels
  • Grease (light coating for O-rings and screens if needed)
  • Gloves and eye protection

Preparation

  • Warm up your engine for a few minutes so the oil flows more easily. Shut off the bike and let it cool briefly to avoid burns.
  • Set the bike upright using a stand for proper draining.
  • Remove the skid plate. On the KTM 350 XCF-W, the skid plate is held with a simple pin that twists and drops out for quick removal. This is specific to these model years and makes access much easier.

Step-by-Step Oil Change Process

  1. Locate the Oil Drain Plug and Oil Screen
    • On the left side, find the main drain plug under the engine. Nearby is the oil screen/plug (usually a large hex head).
    • Make sure your drain pan is directly under both plugs.
  2. Remove the Drain Plug and Oil Screen
    • Use your 13 mm socket to loosen the main drain plug. As you back the plug out, maintain pressure towards the motor to prevent the plug (and crush washer) from dropping into the hot oil.
    • Once oil flow stops, use an 8 mm socket or appropriate tool to remove the oil screen for inspection and cleaning. Clean the screen with contact cleaner and allow it to dry.
    • Check both drain bolt and screen O-rings/crush washers. Replace if worn for leak prevention.
  3. Replace the Oil Filter
    • On the right side, remove the two bolts from the oil filter cover (typically 8 mm). Gently pull the cover straight out to access the oil filter.
    • Remove the old filter and note its orientation. Insert the new filter, matching the direction exactly. Lightly grease filter O-rings if equipped.
    • Clean the cover and check the O-ring seal for damage. Reinstall the cover by hand, then torque bolts to specification (about 7–8 Nm/65–70 in-lbs). DO NOT overtighten; these covers are aluminum and easy to strip.
  4. Reinstall Oil Screen and Drain Plug
    • Reinstall the cleaned oil screen, torquing the plug by hand and then just a slight additional twist—these plugs require very low torque (see service manual, typically 7.5 Nm/66 in-lbs).
    • Reinstall the main drain plug (with new crush washer if possible). Torque to specification (about 15 Nm/11 ft-lbs).
  5. Refill with Fresh Oil
    • The 2015 KTM 350 XCF-W takes approximately 1.0 liter of 10W-50 4-stroke synthetic oil. Use a funnel to prevent spills.
    • Pour oil into the fill cap on the right side (ensure the seal and threads are clean).
    • If you prefer, you can pre-fill the new oil filter to speed oil circulation on first start, but it is not required.
  6. Check Oil Level and Inspect for Leaks
    • Reinstall the oil fill cap and start the engine. Let it idle for a minute, then shut off and let oil settle.
    • Check the sight glass or dipstick on the right side. Top off as needed.
    • Carefully inspect all drain points and the filter cover for leaks.
  7. Reinstall the Skid Plate
    • Secure the skid plate with the twist pin and confirm it is locked around the frame tube. This model’s easy removal system keeps the process fast.

2015 KTM 350 XCF-W Specific Tips and Callouts

  • Skid Plate: 2012–2016 KTM 350s use a fast-removal pin; always reinstall securely to prevent loss during rides.
  • Oil Capacity: Only about 1.0 liter required; overfilling can cause excessive engine pressure and leaks.
  • Torque Values: Both the oil screen and oil filter cover bolts require low torque. Overtightening risks stripping soft aluminum threads.
  • Frequency: Change oil every 10–15 engine hours, or sooner if you ride hard.
  • O-rings/Crush Washers: Replace regularly to avoid slow leaks. Always check their condition when performing an oil change.
  • Oil Quality: Use only high-quality, full-synthetic motorcycle oil to protect the high-performance engine.

Routine oil changes are crucial on KTM dirt bikes due to their high-revving engines and limited oil capacity. Do not skip or delay this service. For genuine KTM parts and all your dirt bike maintenance needs, trust MotoSport.com — your one-stop shop for quality tools and products.

Related Shopping Categories

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Shop Tools for a 2015 KTM 350 XCF-W Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2015 KTM 350 XCF-W Dirt Bike.

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.