How to Change the Coolant in a 2019 Husqvarna TC125
Maintaining your 2019 Husqvarna TC125 is critical for top performance – changing the coolant is a key part of that. The TC125, known for its lightweight 2-stroke power and premium components, requires attentive cooling system care to prevent overheating and ensure reliable operation both on the track and trail. The 2019 model features a robust liquid cooling system with dual radiators. Below is a step-by-step, MotoSport-exclusive guide for a safe and thorough coolant replacement.
What You'll Need
- Fresh, compatible coolant (ethylene glycol-based for aluminum engines is recommended; check the owner's manual for specifics)
- Basic hand tools (socket set, screwdrivers)
- Drain pan
- Clean rags
- Protective gloves and eyewear
Quick Note on the 2019 TC125
Your TC125's radiators are high-capacity and its water pump is specifically engineered for 2-stroke duty. For riders who race or ride in hot climates, consider a cooling system upgrade or reinforced hoses to further protect your engine.
Step-by-Step Coolant Change Process
- Let the bike cool completely. Never attempt this with a hot engine or radiators – coolant can cause severe burns under pressure.
- Access the cooling system. Remove the seat and fuel tank if needed for easier access to the radiator cap and drain bolt (consult your owner's manual for removal instructions if uncertain).
- Remove the radiator cap. Slowly twist off the radiator cap to release any residual pressure.
- Find and remove the drain bolt. On the 2019 TC125, the coolant drain bolt is located at the base of the water pump cover on the right-hand side of the engine. Place a drain pan beneath and fully remove this bolt.
- Drain the old coolant. Allow coolant to fully evacuate the system. Tilt the bike side-to-side carefully to clear any trapped coolant from each radiator lobe.
- Inspect the system. Check hoses, gasket surfaces, and radiator for signs of leaks, wear, or debris. Now is a perfect time to replace worn components.
- Reinstall and torque the drain bolt. Clean the bolt and threads; torque it to the specification listed in your service manual to prevent damage or leaks.
- Fill with new coolant. Pour coolant slowly into the radiator until visible at the base of the filler neck. The TC125 features a small bleeder screw on the cylinder head – loosen this screw slightly during filling to allow trapped air to escape, then retighten after coolant appears.
- Bleed trapped air. Gently rock the bike or squeeze radiator hoses to encourage any remaining air to rise out through the filler. Top off as necessary.
- Reinstall the radiator cap. Secure the cap tightly.
- Start and warm up the engine. Allow the bike to reach full operating temperature, then shut off and let it cool completely. Recheck coolant levels in the radiator and expansion tank. Add coolant if lowered.
Key Model-Specific Reminders
- 2019 TC125 models lack a thermostatic radiator fan – overfilling coolant can cause expansion overflow, so always fill to the base of the filler neck, not above.
- If you frequently ride in freezing temperatures, consult page 98 of your owner's manual for proper coolant mix and cold weather prep to avoid freeze damage.
- Persistent air bubbles or rapid coolant loss may indicate a damaged water pump seal or head gasket – inspect thoroughly if symptoms appear.
Keep your Husqvarna TC125 running at peak performance with routine coolant changes and regular system checks – a simple DIY task that pays back every time you twist the throttle.
Related Shopping Categories
Shop Radiators for a 2019 Husqvarna TC125 Dirt Bike.
Shop Coolant for a 2019 Husqvarna TC125 Dirt Bike.
Shop Temperature Sensors for a 2019 Husqvarna TC125 Dirt Bike.
Shop Tools for a 2019 Husqvarna TC125 Dirt Bike.
Shop Radiator Hoses for a 2019 Husqvarna TC125 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.