How to Change the Coolant in a 2023 Husqvarna TC125
Shop parts for a 2023 Husqvarna TC125 Dirt Bike.
Keeping your 2023 Husqvarna TC125 running at peak performance means regular maintenance–and that includes changing the coolant. The TC125 features a highly advanced two-stroke engine with a central mass design, electronic exhaust control, and high-end cooling system, so ensuring fresh coolant circulates efficiently is key for optimal operation and longevity. Follow the MotoSport-exclusive guide below for a step-by-step coolant replacement specifically for your TC125.
What You Need
- Coolant compatible with motocross 2-stroke engines (see owner's manual for recommended specs)
- Drain pan
- Socket set and wrenches
- Protective gloves and rags
Step-by-Step Coolant Change Guide
-
Let the bike cool down
Only work on the cooling system when the engine is completely cool to prevent burns and pressure build-up release. -
Remove the seat and radiator shrouds
Use the appropriate wrench to remove the single seat bolt, then slide the seat forward off the frame. Remove the bolts from each radiator shroud to expose the cooling system. On the TC125, these fasteners are easy to access and designed for quick removal. -
Access the radiator cap
Press down and turn the radiator cap counterclockwise to release it. Set the cap aside in a clean location. -
Locate and remove the coolant drain bolt
Position a drain pan under the water pump. Remove the drain bolt from the lower side of the water pump housing. Allow the coolant to fully drain into the pan. -
Inspect and clean
Check the drained coolant for signs of contaminants or corrosion. If present, consider a full system flush before refilling. -
Replace the drain bolt
Clean and reinstall the drain bolt. Torque it to the manufacturer's recommendation to avoid leaks. -
Fill with new coolant
With the bike upright, slowly pour fresh coolant into the radiator until full. The TC125 includes a bleed port on top of the cylinder head to help expel trapped air–after filling, loosen this bleeder screw until you see coolant without bubbles, then retighten. -
Check and top off
Continue adding coolant as needed. Once the radiator is full and no more air escapes the bleeder, replace and secure the radiator cap. -
Reinstall shrouds and seat
Attach the radiator shrouds and reinstall the seat, ensuring all bolts are secured to the correct torque. -
Run and inspect
Start the engine briefly. Shut it off, then recheck the coolant level once the bike cools. Top off if necessary.
Model-Specific Tips for the 2023 TC125
- Centralized engine mass ensures easy access to drain points and excellent drainage efficiency.
- Electronic exhaust control systemunique to recent Husqvarna 125smeans the engine requires consistent cooling for optimal power delivery and reliability.
- Slim two-stroke design means make sure radiator hoses and clamps are aligned when reinstalling plastics, to avoid kinks or pinched lines.
- Always use coolant compatible with magnesium engine cases and aluminum radiators—avoid automotive antifreeze unless specified by Husqvarna.
For high-performance bikes like the TC125, sticking to a regular coolant service schedule supports longevity and power. MotoSport offers everything you need for Husqvarna routine maintenance and more. Make your next ride smooth–and cool–with fresh coolant.
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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.