How to Change the Coolant in a 2023 Husqvarna TX300: Step-by-Step Guide
Shop parts for a 2023 Husqvarna TX300 Dirt Bike.
Keeping the cooling system fresh is crucial for the performance and longevity of your 2023 Husqvarna TX300. Regular coolant changes help maintain consistent operating temperature, reduce corrosion, and prevent overheating. This model uses a liquid-cooled two-stroke engine that benefits from thorough maintenance, especially if raced or ridden aggressively.
What Makes the 2023 TX300 Unique?
- Modern TPI Two-Stroke: The 2023 TX300 uses Transfer Port Injection for cleaner emissions and a broader powerband.
- Parallel Radiator Design: Both radiators are connected, so draining must be complete to avoid mixing old and new coolant.
- Access Considerations: The coolant drain bolt is located above the power valve on the right side of the engine case–not the left, as with some earlier 2-strokes. Always confirm on your machine.
Tools & Supplies You Will Need
- Ratcheting socket wrench with an 8mm or 13mm socket (refer to your bike—some use 8mm, some 13mm)
- Drain pan and funnel
- Fresh coolant formulated for off-road motorcycles
- Rags or shop towels
- Screwdriver (for plastic radiator guards or loosen clamps if needed)
- Distilled water (if flushing the cooling system)
- Torque wrench (optional for reinstalling the drain bolt)
Step-By-Step Coolant Replacement
- Prep the Motorcycle: Let the engine cool completely, then stand the TX300 upright on a level surface – using a center stand or bike lift is ideal.
- Remove the Radiator Cap: Ensure there is no pressure in the system by slowly unscrewing the radiator cap. This allows coolant to drain freely.
- Locate the Drain Bolt: On the 2023 TX300, the drain bolt is found on the right side of the cylinder, just above the power valve cover. Place your drain pan directly underneath.
- Remove the Drain Bolt: Use your socket wrench to loosen and remove the bolt. Let all coolant fully drain into the pan.
Optional: Gently lean the bike from side to side to help evacuate lingering coolant from both radiators. - Flush if Necessary: For heavily contaminated systems, install the bolt and fill with distilled water. Reinstall the cap, start the bike, let it idle for a few minutes, then repeat the drain process.
- Reinstall the Drain Bolt: Carefully clean the bolt and sealing surface. Tighten by hand and, if desired, torque to factory spec.
- Pour in New Coolant: Using a funnel, fill the radiator slowly with the recommended coolant until just below the fill neck.
- Bleed the System: Some TX300s have a small bleeder screw at the highest point on the cylinder head. Crack this open briefly as you fill to let out trapped air, then tighten once coolant comes out steadily.
- Top Off and Check: Reinstall the radiator cap. Start the bike and let it idle for a couple of minutes, then shut off and let it cool. Re-check the coolant level and add if necessary.
- Inspect for Leaks: Wipe down all fittings and check beneath the bike for drips or moist spots.
Pro Tips for TX300 Owners
- Use only premixed coolants recommended for high-performance two-strokes—never add straight water except for emergency flushing.
- Replace the coolant every year or after heavy use in muddy, sandy, or high-heat conditions.
- Check your radiator guards/hoses for debris or minor impact damage during every coolant change.
- If you regularly ride in extreme cold, use a coolant rated for freezing temperatures to prevent internal engine or radiator damage.
Routine coolant replacement is simple and pays off with longer engine life, fewer breakdowns, and consistent power—making every ride on your 2023 Husqvarna TX300 that much more enjoyable.
Related Shopping Categories
Shop Radiators for a 2023 Husqvarna TX300 Dirt Bike.
Shop Coolant for a 2023 Husqvarna TX300 Dirt Bike.
Shop Temperature Sensors for a 2023 Husqvarna TX300 Dirt Bike.
Shop Tools for a 2023 Husqvarna TX300 Dirt Bike.
Shop Radiator Hoses for a 2023 Husqvarna TX300 Dirt Bike.
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.