How to Change the Oil in a 2015 KTM 350SXF

Shop parts for a 2015 KTM 350SXF Dirt Bike.

Regular oil changes are essential for keeping your 2015 KTM 350SXF running strong, ensuring peak performance and engine longevity. This step-by-step guide—proprietary to MotoSport.com—walks you through the complete process, includes all necessary tools, and highlights critical model-specific details.

Tools & Supplies Needed

  • 13mm socket or wrench (for drain plug and oil screen cover)
  • 8mm socket (for oil filter cover)
  • T-bar handle or ratchet
  • Drain pan
  • Replacement oil filter
  • Replacement oil (KTM recommends a premium 10W-50 full synthetic)
  • Clean rags
  • Pick tool or needle-nose pliers (to remove oil screen)
  • Contact cleaner (to clean the oil screen and wipe up spills)
  • Funnel
  • Torque wrench (optional for precise tightening)
  • Gloves (recommended)

Before You Start

  • Warm the engine: Run your bike for 3–5 minutes to warm the oil—this helps it flow out smoothly and carries out contaminants.
  • Stabilize the bike: Use a sturdy stand to keep the bike upright and stable.
  • Remove skid plate (if equipped): Some bikes have an easily removable skid plate for quicker access to the drain plug.

Step-by-Step Oil Change Process

  1. Drain the Oil
    • Locate the 13mm drain plug beneath the engine case. Position your drain pan underneath.
    • Carefully loosen and remove the drain bolt. Let the oil fully drain into the pan.
    • Inspect the magnetic drain bolt for metal shavings—a small amount is normal, but excessive metal could indicate engine wear. Wipe clean before reinstalling.
  2. Remove and Clean the Oil Screen
    • The 350SXF uses a metal oil screen to catch debris. It's located nearby the drain bolt, secured with another 13mm cover bolt.
    • After removing the bolt, you may need to use a pick or small pliers to gently pull out the screen.
    • Spray the oil screen with contact cleaner and wipe away any metal particles or debris.
    • Carefully reinstall the clean screen—ensure it seats properly.
  3. Replace the Oil Filter
    • Remove the oil filter cover using an 8mm socket (two small screws).
    • Let any remaining oil drain from the filter area. Use pliers or a pick to pull out the old filter.
    • Lightly oil the new filter's seals with a dab of fresh oil. This ensures a proper seal.
    • Install the new filter and reinstall the cover, tightening the bolts evenly by hand. Do not overtighten.
  4. Refill with Fresh Oil
    • Double-check that all bolts (drain plug, filter cover, and oil screen) are properly tightened.
    • Set your funnel in the oil fill port and pour in just over 1 liter of 10W-50 oil (KTM recommends 1.10 liters for a full change with filter).
    • Wipe up any spills around the frame or engine using contact cleaner and a rag.
  5. Prime and Check Oil Level
    • Optionally, you can prime the oil system by holding the kill switch and cranking the engine for a few seconds—this circulates oil before the first start.
    • Start the bike and let it idle for 1–2 minutes. Turn off and let it sit for 1–2 minutes.
    • Check oil level using the sight glass or dipstick as equipped. Add a small amount if needed.
  6. Dispose of Used Oil Properly
    • Bring your used oil and filter to a certified recycling facility or auto parts store that accepts waste oil—never dump oil outdoors.

Important 2015 KTM 350SXF Model Call-Outs

  • Magnetic Drain Bolt: The 2015 KTM 350SXF is equipped with a magnetic drain plug, making it easy to inspect for metal debris and monitor engine health. Always inspect and clean this magnet at every oil change.
  • Dual Oil Filtration: In addition to the standard oil filter, don't forget the oil screen—unique to many KTM models. Cleaning this screen is critical for optimal oil flow and engine lubrication.
  • Exact Oil Capacity: Use about 1.10 liters of oil. Overfilling can cause excess crankcase pressure, while underfilling risks engine damage.
  • Minimal Tools Required: The layout and access on this bike are straightforward—KTM designed the 350SXF with regular serviceability in mind, so all oil service points are close and easily accessible.
  • Torque Specs: If using a torque wrench, tighten the drain plug and oil screen bolts to KTM specifications—generally around 10-15 Nm (7–11 ft-lb). Don't overtighten the oil filter cover screws.

Pro Tips

  • Change your oil every 5–10 hours of riding for motocross and track use, or every 15–20 hours for light trail riding. Always check your owner's manual for specific intervals.
  • Keep some spare washers on hand, as the drain plug crush washer should be replaced if damaged to prevent leaks.
  • Keep your work area clean and organized for a quick, mess-free job.

Maintaining your 2015 KTM 350SXF with regular oil changes will keep your engine in top shape and ensure years of trouble-free riding. Follow these steps for a reliable, confidence-inspiring service every time.

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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.