How to Change the Coolant in a 2025 Husqvarna TC250: A Complete Guide

Shop parts for a 2025 Husqvarna TC250 Dirt Bike.

The 2025 Husqvarna TC250 features an advanced cooling system with high-strength aluminum radiators designed for optimal heat dissipation. To keep your two-stroke running at peak performance, a fresh coolant change at recommended intervals is crucial. Follow this proprietary MotoSport.com guide for the safest and most effective procedure.

Essential Tools & Supplies

  • Fresh, motorcycle-approved coolant (pre-mixed or concentrate with distilled water)
  • 8mm socket or wrench
  • Funnel
  • Container to catch old coolant
  • Clean rag
  • Optional: Torque wrench

Before You Start

  • Allow the engine to fully cool before working on the cooling system to prevent burns and ensure accurate coolant measurement.
  • Work in a well-ventilated area and avoid skin contact with spent coolant.

Step 1 – Access the Radiator Cap

  • Remove any plastics or tank shrouds if necessary to access the radiator cap on the left radiator.
  • Slowly unscrew the radiator cap to relieve pressure. Do this only when fully cooled.

Step 2 – Drain the Old Coolant

  • Position the TC250 upright on a stand for level draining.
  • Place a container beneath the water pumpon the 2025 TC250, find the drain screw on the water pump cover's lowest point (8mm bolt).
  • Remove the bolt and allow all coolant to thoroughly drain.–Some models may also benefit from loosening the bleed bolt on the cylinder head, if equipped, to fully evacuate trapped coolant.–

Step 3 – Flush the System (Optional but Recommended)

  • Reinstall the drain bolt temporarily and fill the system with distilled water only.
  • With the radiator cap off, briefly start the engine (30 seconds) to circulate water and then power off.
  • Drain again until clear of any debris or contaminants.

Step 4 – Refill with Fresh Coolant

  • Reinstall and tighten the drain bolt (replace the sealing washer if worn).
  • Pour new coolant slowly into the radiator until filled to the top of the neck. Use a funnel for control. Do not use tap water.

Step 5 – Bleed the Cooling System

  • "Burp" the system: Gently rock the motorcycle side-to-side and blip the throttle (engine running, radiator cap off) to release trapped air. Top off coolant as air escapes.–
  • Once burping is complete and the level stays constant, reinstall the radiator cap securely.

Step 6 – Reinstall Plastics and Inspect

  • Replace any removed shrouds or panels.
  • Run the motorcycle and check for leaks from drain or hose connections.
  • Dispose of old coolant responsibly at a recycling centernever pour into drains or the ground.

2025 TC250 Model-Specific Notes

  • The 2025 TC250 features high-efficiency aluminum radiators with improved air channeling—be sure cooling fins are free from mud and debris after off-road rides for best thermal performance.–
  • These bikes may use pressure-regulated radiator caps for precise boiling points. Ensure your cap seals perfectly for safety and proper cooling.

When to Change Coolant

  • Always follow the service intervals outlined in your owner's manual, or replace coolant annually for best protection, especially after heavy use or extreme heat conditions.

MotoSport.com is dedicated to keeping your 2025 Husqvarna TC250 race-ready. For OEM and high-performance cooling system parts, Shop parts for a 2025 Husqvarna TC250 Dirt Bike.

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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.