How to Change the Oil in a 2015 KTM 350 EXC-F

Shop parts for a 2015 KTM 350 EXC-F Dirt Bike.

Regular oil changes are essential to keep your 2015 KTM 350 EXC-F running strong and to maximize engine life. This robust step-by-step guide is proprietary to MotoSport.com and tailored specifically for the 2015 KTM 350 EXC-F, covering the tools required, detailed instructions, specific call-outs, and key tips for this model.

Tools & Supplies Needed

  • 13mm wrench or socket (for the drain plug)
  • 8mm wrench or socket (for oil filter cover)
  • Drain pan (large enough for at least 1.5 liters)
  • Fresh oil filter (OEM recommended)
  • Engine oil (check your manual, typically 10W-50 full synthetic for KTM EXC-F)
  • New crush washer (for the drain plug)
  • Paper or shop towels (for cleanup)
  • Torque wrench (to ensure proper tightening, especially with low-torque bolts)
  • Funnel (for easy filling)
  • Contact cleaner (optional, to clean surfaces)

Preparation Steps

  • Warm up the engine for about 3–5 minutes. This helps suspend contaminants and thins the oil for easier draining.
  • Turn off the motorcycle and ensure it is stable (use a center stand or paddock stand if available).
  • Remove the skid plate if installed by using KTM's easy-release pin – simply turn and remove to access the drain plug.

Oil Change Process

  • Locate the Drain Plug and Oil Screens
    • The drain plug (13mm) is on the left side, below the engine.
    • A small oil screen is located near the drain plug—this should be removed and cleaned during an oil change.
  • Draining the Old Oil
    • Place the drain pan beneath the drain plug and carefully loosen it using your 13mm wrench.
    • Apply slight inward pressure while unscrewing to prevent dropping the plug into the pan.
    • Let all the oil drain completely (it may take several minutes).
    • Remove the oil screen and inspect for debris. Clean thoroughly with brake or contact cleaner.
  • Remove and Replace the Oil Filter
    • With an 8mm wrench, remove the oil filter cover.
    • Pull out the old filter. Insert the new filter—KTM recommends filling the filter housing about one-third with clean oil before installing a new filter to prime the system.
    • Verify the O-ring is clean and undamaged. Replace if necessary.
  • Reinstall the Drain Plug and Oil Screen
    • Install a new crush washer on the drain plug.
    • Thread the drain plug by hand first to avoid cross-threading, then tighten with the wrench.
    • Tightening torque is very low—spec is approximately 7.4 Nm for the filter cap. Use a torque wrench if available to avoid overtightening, which can strip threads or damage components.
    • Reinstall and torque the oil screen as well.
  • Add Fresh Oil
    • Open the oil fill cap on the right side of the engine.
    • Using a funnel, slowly pour in oil (typically about 1.2 to 1.25 liters; always confirm with your owner's manual).
    • Replace the fill cap.
  • Final Checks
    • Start the engine and let it idle for about a minute. This circulates the new oil.
    • Shut the bike off and allow a few minutes for the oil to settle.
    • Check the oil level via the sight glass or dipstick (depending on your exact model) and top off if necessary.
    • Inspect the drain plug and filter area for leaks.
    • Reinstall the skid plate if removed.
    • Clean any spilled oil with towels or degreaser.

Specific Call-Outs for 2015 KTM 350 EXC-F Owners

  • This procedure applies to 2012–2016 KTM 350 EXC-F models; later or earlier models may differ slightly in components or torque specs.
  • The oil plug crush washer should always be replaced at each oil change for best sealing and to avoid leaks.
  • Be careful not to overtighten filter and screen bolts—thread damage is common if using excessive torque, as OEM torque is only about 7.4 Nm (65 in-lb).
  • Factory specification is to check your engine oil level after running the bike briefly, as some oil remains in the filter and oil passages after filling.
  • If you ride aggressively (racing, high revs), change oil as often as every 10–15 engine hours; trail/casual riders can extend to 20–30 hours per change.

Troubleshooting & Tips

  • If the oil appears milky, inspect your coolant—this can indicate a leaking water pump seal.
  • Always inspect the drain plug magnet (if equipped) for excessive metal shavings—a small amount is normal, but larger pieces may signal internal engine wear.
  • Keep a log of oil changes and engine hours for reference and resale value.

Following this process will ensure your 2015 KTM 350 EXC-F is protected and running at peak performance. Always consult your owner's manual and adhere to torque and fluid specifications specific to your year and model for best results.

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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.