How to Change the Coolant in a 2020 Husqvarna TC250: Your Complete Guide

Shop parts for a 2020 Husqvarna TC250 Dirt Bike.

The 2020 Husqvarna TC250 is a high-performance 2-stroke motocross bike built for serious riders–keeping it cool under pressure is vital for maximum performance and longevity. Whether you ride hard at the track or hit the trails, maintaining your cooling system is crucial. Here's how to perform a full coolant change and ensure your TC250 stays fresh and ready for the next moto.

What You'll Need

  • Fresh motorcycle coolant (consult your manual for specific type; use premixed or mix with distilled water only)
  • 8mm socket or wrench
  • Catch container or drain pan
  • Funnel
  • Clean rags
  • Protective gloves

Step 1: Preparation

  • Allow the engine to cool completely before starting.
  • Secure the TC250 upright on a stand; the bike should be vertical for proper draining.

Step 2: Remove the Radiator Cap

  • Locate the radiator cap on the left side of the bike.
  • Remove the cap slowly to relieve any built-up pressure.

Step 3: Drain the Old Coolant

  • Place your catch container under the water pump cover on the lower right side of the engine.
  • Locate and remove the dedicated coolant drain bolt using your 8mm wrench.
  • Allow all old coolant to completely drain from the system. For best results, lightly rock or tilt the bike side to side so all fluid escapes–residual coolant can remain trapped otherwise–especially on this model.

Step 4: Flush (Optional but Recommended)

  • If the coolant was dirty or the system hasn't been serviced in a while, flush the system with distilled water.
  • Replace the drain bolt, fill with distilled water, run the engine for a minute, and drain again. Repeat until clear.

Step 5: Reinstall the Drain Bolt

  • Check the drain bolt washer for wear–replace if necessary to prevent leaks.
  • Reinstall and snug the drain bolt, but do not overtighten.

Step 6: Fill with New Coolant

  • Using a funnel, slowly pour new coolant into the radiator neck until full. (Do not use tap water; it deposits minerals inside your radiator and water pump.)

Step 7: Bleed Air from the Cooling System

  • Start the engine with the radiator cap off. As the engine idles, gently rock the bike and blip the throttle to help trapped air escape.
  • Once bubbles stop appearing and coolant level drops slightly, top off.
  • Reinstall the radiator cap securely.

Step 8: Check for Leaks & Test Ride

  • Inspect all connections and the drain bolt for leaks.
  • After your first ride, double-check coolant level and top off if needed.

What TC250 Owners Should Know

  • The 2020 TC250 uses a robust water-cooling system designed for extreme conditions, but air pockets can develop if you do not properly bleed the system; this is especially true due to the engine's unique cylinder layout and high-revving nature.
  • Coolant should be changed at least once a season or immediately after any overheating event.
  • Never mix coolant types–use only high-quality motorcycle-specific formulations as recommended for aluminum engines.

Routine maintenance, including coolant changes, keeps your Husqvarna running at peak performance all season. Consider stockpiling extra cooling system parts and fluids so you're never caught off guard in the pits or on the trail.

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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.