How to Change the Oil in a 2013 KTM 150SX

Shop parts for a 2013 KTM 150SX Dirt Bike.

Changing the oil in your 2013 KTM 150SX is a fundamental aspect of dirt bike maintenance that ensures smooth gear shifting and protects engine components. Performing this service regularly extends the life of your transmission and keeps your ride ready for the track or trail.

Tools and Supplies Needed

  • Metric socket set or T-handle wrenches
  • Torque wrench (capable of measuring at least 20 Nm / 14.8 ft-lb)
  • Oil catch pan
  • Clean rags or shop towels
  • Funnel
  • Replacement crush washer
  • New gear/transmission oil (consult manual, typically 0.8L of high-quality gear oil; check for your regional KTM specification)
  • Pliers (for oil fill cap if needed)
  • Nitrile gloves (optional but recommended for clean hands)

Step-by-Step Instructions

  1. Warm Up the Engine (Optional but Recommended)
    • Run your 2013 KTM 150SX at idle for 2-3 minutes. This helps suspend impurities in the oil and thins it out for easier draining.
    • Shut off the engine before proceeding. Be aware the oil and engine parts can be hot.
  2. Remove the Oil Fill Cap
    • Locate the oil fill cap on the right side of the engine. Remove it to allow oil to drain smoothly and prevent a vacuum from forming.
  3. Place an Oil Catch Pan Under the Engine
    • Position the pan below the drain plug to catch the used oil as it drains from the transmission case.
  4. Remove the Drain Plug
    • Locate the oil drain plug under the engine. Use the appropriate socket or T-handle to carefully loosen and remove the plug.
    • Be cautious, as hot oil will drain rapidly. Let the oil drain fully (this can take several minutes).
  5. Clean and Inspect the Drain Plug
    • The drain plug is magnetic. Wipe off any metallic debris—some particles are normal as they indicate the oil is trapping small wear particles.
    • Replace the crush washer with a new one each oil change to prevent leaks.
  6. Reinstall and Torque the Drain Plug
    • Thread the drain plug by hand first to avoid cross-threading. Tighten it with your wrench, then use a torque wrench to set it to 20 Nm (14.8 ft-lb) as specified for KTM two-stroke drain plugs

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  7. Refill with Fresh Oil
    • Insert a clean funnel into the oil fill hole and pour in fresh transmission/gear oil.
    • Oil Quantity: The 2013 KTM 150SX requires approximately 0.8 liters of quality gear/transmission oil. Use oil that meets the manufacturer's specification for optimum clutch and gear protection

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  8. Secure the Oil Fill Cap
    • Reinstall the fill cap and use pliers to snug it up slightly as recommended by KTM, ensuring it can’t vibrate loose. Do not overtighten.
  9. Wipe Down and Inspect
    • Clean up any oil drips on the cases and skid plate. Check for leaks, especially around the drain bolt and fill cap.
    • Dispose of the used oil responsibly by taking it to a local collection center.
  10. Final Checks
    • Start the bike and let it run for 30-60 seconds. Check for leaks around the drain and fill points.
    • After the engine has sat for a few minutes, check the oil level with the inspection bolt as described in your owner's manual to ensure it's at the correct level.

2013 KTM 150SX Model-Specific Call-Outs

  • The 2013 150SX gear oil circuit is completely separate from the premix for the top end. Only the gear/transmission oil is replaced in this procedure.
  • The bike uses a magnetic drain plug; cleaning this is crucial for longevity. Replace the crush washer every oil change to prevent leaks.
  • Torque the bolt carefully: KTM specifies 20 Nm (14.8 ft-lb). Overtightening may damage the case.
  • Only use the recommended oil type and quantity. Using the wrong oil type or amount harms clutch performance and could lead to transmission failure.
  • The oil change procedure is similar to other KTM two-strokes of this generation, but always reference your owner's manual for updated specs or torque values as they may vary slightly between production batches.

MotoSport.com Pro Tip

  • Always record the date and engine hours at the time of your oil change. This makes it easier to stick to your maintenance schedule and maximize the life and value of your 2013 KTM 150SX.

Performing this regular maintenance task helps keep your KTM 150SX running at peak performance—whether you’re riding motocross, trails, or just enjoying the thrill of two-stroke power.

Related Shopping Categories

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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.