How to Change the Coolant in a 2020 KTM 250 XCW TPI

Shop parts for a 2020 KTM 250 XCW TPI Dirt Bike.

The KTM 250 XCW TPI features Transfer Port Injection, offering consistent fuel delivery and efficient cooling for demanding rides. Regular coolant changes are crucial for maintaining top performance and preventing costly engine damage. Here's a step-by-step MotoSport guide to changing your coolant safely and effectively—plus unique notes for the 2020 TPI model.

Tools & Supplies You Need

  • New coolant (premixed or manufacturer-recommended concentrate)
  • 10mm socket or spanner
  • Drain pan
  • Funnel
  • Rags or shop towels
  • Gloves and eye protection

Step-by-Step Coolant Change Procedure

  1. Ensure the bike is cool and secure.
    Allow your KTM to cool completely; hot coolant under pressure can cause burns. Position the bike upright on a stand or flat ground.
  2. Remove the radiator cap.
    Locate the radiator cap near the steering stem and unscrew it to relieve pressure and prepare for draining.
  3. Locate the coolant drain bolt.
    On the 250 XCW TPI, the coolant drain is typically a 10mm bolt found on the lower water pump cover, easily recognized by its copper washer. Place your drain pan beneath this area. Remove the bolt fully and allow all coolant to drain out—give it several minutes for a complete drain.
  4. Flush if necessary.
    If coolant is very dirty, flush the system with distilled water. Replace the drain bolt with a new crush washer if available, then refill and drain with clean water, repeating until it runs clear. Always reinstall the bolt securely after each flush.
  5. Check and replace hose connections (optional).
    For a thorough job, inspect hoses and radiator clamps for wear. Some owners choose to disconnect the lower radiator hose as well to remove residual coolant—use care, as additional coolant may still be trapped in low spots.
  6. Reinstall the drain bolt.
    Using a new copper or crush washer (recommended), reinstall the drain bolt. Do not overtighten—follow KTM torque specs to prevent damage.
  7. Refill the radiator.
    Using a funnel, slowly pour in fresh coolant rated for high-performance off-road engines. Fill until coolant reaches just below the base of the radiator neck. Tap hoses gently to dislodge air bubbles, and top off as needed.
  8. Bleed the system (if needed).
    Start the bike with the radiator cap off for ~30 seconds, watching for bubbling as air purges. Shut off the engine when the coolant starts to rise and recheck the level. Add coolant if needed, then install and secure the radiator cap.
  9. Inspect and test.
    Check for leaks around the drain bolt and hoses. Ride gently for a few minutes, let the bike cool, and recheck the coolant level. Top off if required.

Important Notes for 2020 KTM 250 XCW TPI Owners

  • Coolant capacity is relatively small compared to older models, so even minor leaks are critical—never ignore drops in the overflow bottle.
  • Use only compatible coolants that are safe for aluminum radiators. Silicate-free coolants help prevent water jacket clogging, a known issue in some off-road bikes.
  • Routine service recommendation: Change coolant every 40-50 hours of riding, or once per season for recreational use.
  • Bleed screws: Some XCW TPI models feature cylinder head bleed screws for easier air removal—consult your manual and use if equipped.
  • Throttle body and temperature sensor connections near the head are sensitive—avoid pulling on harnesses or damaging sensor tabs during service.

Regular coolant changes are a smart way to protect your KTM 250 XCW TPI and keep you on the trail. Don't wait for problems—follow this straightforward process and enjoy reliable cooling performance every ride.

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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.