How to Change the Coolant in a 2013 KTM 350XCF

Shop parts for a 2013 KTM 350XCF Dirt Bike.

A coolant change is vital maintenance for your 2013 KTM 350XCF, helping keep the four-stroke engine performing at its peak and preventing overheating, especially under demanding trail or track conditions. This guide details everything a KTM owner needs to know—from required tools to model-specific notes—for a routine coolant change.

Tools & Supplies Needed

  • Fresh ready-to-use motorcycle coolant (not just water; use a premix recommended for KTM dirt bike engines)
  • 8 mm socket or wrench
  • Drain pan or catch container
  • Funnel
  • Clean shop rags
  • Torque wrench (recommended)

Step-by-Step Coolant Change Procedure

  1. Preparation
    Ensure the engine is completely cool before starting to avoid burns. Stand your 2013 KTM 350XCF upright on a level surface. Remove any shrouds or covers blocking access to the radiator cap.
  2. Remove Radiator Cap
    Slowly open the radiator cap to release any residual pressure. This allows the system to vent and coolant to drain freely.
  3. Locate and Remove Water Pump Drain Bolt
    Place your drain pan below the water pump area (left side, near the case). Use an 8 mm socket to remove the water pump cover screw. Coolant will begin draining immediately, so position the drain pan accordingly.
  4. Drain System & Inspect
    Let the coolant fully drain. Inspect the coolant color—milky or rusty coolant may indicate contamination or other system concerns. Remove the radiator cap to ensure all fluid drains from both the radiator and the engine passages.
  5. Reinstall Drain Bolt
    Replace the M6 drain screw with a new seal ring if possible, and torque to 10 Nm (7.4 lbf ft) as recommended. Clean up any spilled coolant with rags.
  6. Refill Coolant
    Using a funnel, slowly pour fresh motorcycle coolant into the radiator until it nearly reaches the base of the filler neck.
  7. Bleed Air from the System
    Gently tap the hoses and squeeze them by hand to dislodge trapped air. Fill until the level stays consistent in the radiator.
  8. Warm Up the Engine
    Temporarily install the radiator cap, start the engine, and let it warm up until the thermostat opens (the radiator fan may cycle on). This will help further burp the cooling system (do not allow the bike to overheat during this step). Turn the engine off and let the dirt bike cool completely.
  9. Final Coolant Level Check
    With the bike cool, remove the cap and verify the coolant level is at the base of the neck. Top off if needed. Wipe everything down and securely reattach any removed plastics or covers.
  10. Dispose of Old Coolant
    Take used coolant to a proper disposal facility—never pour it down the drain or on the ground.

Model-Specific Tips for the 2013 KTM 350XCF

  • This engine uses a sealed cooling system with no separate overflow bottle—ensure the filling is done slowly and carefully to avoid air pockets.
  • KTM recommends regular coolant checks, especially if riding in high heat or slow technical terrain, as this bike can run hot under load.
  • If you see regular drops in coolant level without evidence of external leaks, check the water pump seal and radiator for internal leaks—these are known maintenance items as the bike ages.
  • Always refill using a silicate-free motorcycle coolant specifically approved for aluminum engines to maximize corrosion protection.
  • If your bike is equipped with a fan kit, ensure it cycles on when hot after refilling to confirm proper operation and burping.

Maintenance Reminder

Change your coolant every 2 years or 40 engine hours, whichever comes first, for maximum engine protection and longevity.

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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.