How to Change the Coolant in a 2013 KTM 350SXF

Shop parts for a 2013 KTM 350SXF Dirt Bike.

Proper coolant maintenance is essential for peak performance and longevity of your 2013 KTM 350SXF. This guide will walk you through the process step-by-step and address KTM-specific cautions for this model.

What You Need

  • New coolant (use a quality motorcycle-specific coolant suitable for aluminum engines)
  • Drain pan or bucket
  • 8 mm socket or wrench
  • Funnel
  • Clean rags
  • Torque wrench (recommended but not required)

Step-by-Step Coolant Change for KTM 350SXF

  1. Preparation
    • Ensure the engine is cool to prevent burns and pressure buildup.
    • Position your bike upright and on a stable stand.
  2. Remove the Radiator Cap
    • Slowly turn the radiator cap counter-clockwise to release any remaining pressure.
  3. Drain the Old Coolant
    • Locate the coolant drain bolt on the lower water pump cover (typically 8 mm).
    • Place the drain pan underneath.
    • Remove the drain bolt and allow all coolant to drain completely.
    • Check for any deposits or metallic debris in the coolant – this could indicate other issues.
  4. Flush (Optional for thoroughness)
    • If previous coolant was dirty or contaminated, add distilled water to the radiator, reinstall the drain bolt, and run the bike briefly. Drain again before refilling with new coolant.
  5. Replace the Drain Bolt
    • Clean the bolt and sealing surfaces with a rag. Reinstall and tighten finger-tight, then gently with your wrench. Do not overtighten.
  6. Refill Coolant
    • Slowly pour new coolant into the radiator with a funnel, filling to just below the lip of the filler neck.
    • KTM's design sometimes traps air, so tilt the bike side-to-side gently to help bubbles escape.
  7. Bleed the System
    • On KTM bikes, air pockets can form in the cylinder and hoses. If your model has air bleeder bolts (usually on the cylinder head or top of the radiator), loosen these slightly as you fill until coolant escapes, then tighten.
  8. Reinstall Radiator Cap
    • Ensure no tools or rags are left near the engine. Firmly reinstall the radiator cap.
  9. Run & Recheck
    • Start the bike and let it reach operating temperature with the radiator cap on.
    • Shut it off and let it cool. Recheck coolant level, topping off as needed.

KTM 350SXF Model-Specific Notes

  • The 2013 KTM 350SXF features a lightweight aluminum radiator that provides efficient cooling for high-rev motocross riding. The cooling capacity should be maintained using only OAT (organic acid technology) or silicate-free coolants suitable for modern KTM engines.
  • Inspect radiator fins for debris or bent sections – clean and straighten as needed for optimal airflow.
  • Extreme mud or high-temperature riding? Consider a high-pressure radiator cap or auxiliary fans from MotoSport.com to keep your engine protected.
  • Never mix different coolant types, as this can cause chemical reactions harmful to gaskets and internal engine parts.

Safety & Environmental Tips

  • Avoid skin and eye contact with coolant;
  • Dispose of old coolant at an approved recycling location;
  • Always double-check tightness of bolts and the secure fit of your radiator cap before riding.

Routine coolant changes help keep your KTM 350SXF running cool through every moto. Follow maintenance intervals and regularly check for leaks or drops in coolant level for best longevity.

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.