How to Change the Coolant in a 2015 Husqvarna TE125
Shop parts for a 2015 Husqvarna TE125 Dirt Bike.
Regular coolant changes are essential for keeping your 2015 Husqvarna TE125 running at its best–protecting your engine from overheating and internal corrosion. This guide is tailored specifically for your TE125 and provides clear, step-by-step instructions for a safe, thorough coolant change.
What Makes the TE125 Unique?
- Lightweight, high-revving 2-stroke engine – requires consistent cooling for maximum performance, especially in technical terrain.
- Aluminum radiators – these are highly efficient, but sensitive to debris and scale; use only the recommended coolants to avoid internal damage.
- 1.2 L coolant capacity – do not overfill, as this can lead to pressure issues and leaks.
Before You Begin
- Allow the engine to fully cool. Hot coolants can cause burns.
- Position the motorcycle upright and stable for accurate draining and refilling.
- Gather these supplies:
- Motorcycle-specific coolant or pre-mixed 50/50 coolant (never mix with tap water)
- Distilled water, if using concentrated coolant
- Clean container for the old coolant
- New seal ring (recommended for the drain bolt)
- Basic hand tools (ratchet, sockets, screwdrivers)
- Shop rags and gloves
Step-by-Step Coolant Change
- Remove the radiator cap:
- Do this only after the engine is cool.
- Locate and Remove the Drain Bolt:
- The drain bolt is typically beneath the water pump on the engine’s right side. Place your catch container underneath.
- Remove the bolt and allow all coolant to drain. If your model has a coolant overflow reservoir, drain it as well by removing its small hose.
- Flush (Optional for Thorough Service):
- If the drained coolant is dirty or contaminated, flush the system with distilled water.
- Add distilled water, reinstall the drain bolt, run the bike briefly, then drain again.
- Install a New Seal Ring:
- Fit a new seal ring on the drain bolt, then reinstall and tighten securely.
- Refill with New Coolant:
- With the bike completely upright, slowly fill the radiator to the top of the filler neck (your total capacity is approximately 1.2 liters for the TE125).
- Do not overfill.
- Burp the System:
- Start the bike with the radiator cap off. Let it run for a few minutes while gently rocking the bike and blipping the throttle. This releases trapped air bubbles, ensuring full system fill.
- Top off coolant as needed, then install the radiator cap.
- Check the Overflow Reservoir:
- Fill to the upper line if your TE125 is equipped with one.
- Check for Leaks:
- Start and run the bike, watching carefully for leaks at the drain bolt, hoses, and radiator cap.
- Dispose of Old Coolant Properly:
- Take used coolant to an appropriate recycling center.
Extra Notes for the 2015 TE125 Owner
- If your bike is used in muddy or rocky conditions, inspect the radiator fins for damage or debris.
- Never allow the coolant level to drop below the minimum mark, as this engine is highly sensitive to overheating damage.
- Check and clean the overflow hose regularly – debris buildup is a common cause of blocked overflow and can lead to coolant loss during hard riding.
Following these steps will keep your 2015 Husqvarna TE125’s cooling system healthy, support optimal performance, and help prevent costly repairs due to overheating. Always consult your owner’s manual for specific torque values and coolant recommendations for your machine.
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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.