How to Change the Coolant in a 2017 Husqvarna TX300

Shop parts for a 2017 Husqvarna TX300 Dirt Bike.

Properly maintaining the cooling system on your 2017 Husqvarna TX300 is essential for both performance and engine longevity. Coolant protects against overheating and internal wear; replacing it according to intervals keeps your TX300 running strong on any terrain. This model features a high-performance two-stroke engine, and cooling system care is especially important for racers and off-road enthusiasts pushing the bike to its limits.

Tools and Materials Needed

  • Fresh coolant (silicate-free, dirt bike specific)
  • Drain pan
  • 8mm or 10mm socket (check your drain bolt size)
  • Phillips screwdriver
  • Rags for cleanup
  • Funnel (optional, for refilling)
  • Allen wrenches (if removing plastics or tank)
  • Safety gloves

Preparation Steps

  • Allow the motorcycle to fully cool. Never open the radiator when hot – pressurized hot coolant can cause injury.
  • Place the bike on a stable stand, ideally on level ground.
  • Remove the seat and side panels if needed for easy access to the radiator cap and drain area.

Draining Old Coolant

  • Locate the radiator cap under the right shroud. Remove it by pressing down and turning counterclockwise.
  • Position your drain pan underneath the right side engine area – the coolant drain bolt is typically near the water pump cover or the lowest point on the right engine case.
  • Using your socket, carefully remove the coolant drain bolt. The old coolant will begin to flow out. Allow all fluid to drain completely.
  • You can gently tilt the bike from side to side to encourage full drainage from both radiators.

Flushing the System (Recommended)

  • Reinstall the drain bolt temporarily. Add distilled water to the radiator and let it drain out by repeating the process above. This helps flush out contaminants, old coolant, and any deposits. Repeat until the drained water runs clear.
  • Reinstall the drain bolt and tighten securely – avoid overtightening as the aluminum threads can strip easily.

Refilling with Fresh Coolant

  • Using a funnel, fill the radiator slowly with fresh, appropriate coolant until it reaches the bottom of the radiator cap neck.
  • Check the overflow or expansion tank (if equipped) and ensure it is filled to the correct mark.
  • Reinstall the radiator cap.

Bleeding and Final Steps

  • Start the engine and let it idle for several minutes with the bike upright. As the thermostat opens, air pockets may work their way out.
  • Turn off the engine, let it cool, and check the coolant level again. Top off as needed.
  • Inspect for any leaks around the drain bolt and hoses, and reinstall bodywork.
  • Dispose of old coolant responsibly; never pour it down the drain or on the ground.

2017 Husqvarna TX300 Model Notes

  • The TX300's slim radiator shrouds give easy access to the cap and radiators, minimizing panel removal during service.
  • If you frequently race or ride hard, consider a coolant additives kit or radiator guard upgrade for added protection and cooling efficiency. Signs of overheating, steam, or loss of coolant may signal the need for deeper service or upgrades.
  • Always use non-silicate, motorcycle-specific coolant to prevent internal corrosion and seal wear, especially for KTM/Husqvarna two-strokes.

Regular coolant changes keep your TX300 ready for every ride, from tight single track to open desert. Maintaining the cooling system not only protects against extreme temperatures but also forms the backbone of reliability and performance that true riders expect.

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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.