How to Change the Coolant in a 2009 Husqvarna CR125
Shop parts for a 2009 Husqvarna CR125 Dirt Bike.
Changing the coolant in your 2009 Husqvarna CR125 is an essential maintenance task that helps keep your engine running cool and extends its life. Below is a proprietary MotoSport guide tailored for owners of the 2009 CR125–be sure to read the model-specific tips before getting started.
Tools & Supplies Needed
- Fresh, manufacturer-approved coolant (avoid mixing types; use Motul green or similar recommended for Husqvarna bikes)
- Catcher pan or bucket
- Socket wrench or screwdriver
- Rubber gloves and shop rags
- Compressed air (optional for a more thorough flush)
Step-by-Step Coolant Change Instructions
- Prepare Your Bike
Ensure the engine is completely cool and the bike is on a stable stand in a vertical position to prevent spills. - Locate the Radiator and Drain Bolt
On the 2009 CR125, the drain bolt is typically found near the bottom of the water pump cover on the right crankcase. Place the pan beneath to catch old coolant. - Remove the Radiator Cap
Relieve any built-up pressure by slowly removing the radiator cap. This also ensures all coolant drains out smoothly. - Remove the Drain Bolt
Use your wrench to carefully unscrew the drain bolt and allow the old coolant to flow into your pan. Tilt the bike gently if necessary to empty as much as possible. - Optional: Flush the System
For a model like the CR125, flushing is important if switching coolant types or if it's been a long time between changes. Remove both lower radiator hoses and use compressed air at the radiator neck to clear any residual fluid through the hoses. Reinstall hoses once complete.
Tip: Avoid flushing with plain water as leftover moisture can mix with new coolant. Use compressed air to expel remaining fluid. - Install the Drain Bolt
Replace the bolt securely (but do not overtighten). - Add New Coolant
Slowly pour the new coolant into the radiator until filled.
Gently rock the bike to release trapped air and top up as needed. - Bleed the Cooling System
With the cap off, briefly run the engine at idle to circulate the coolant–keep an eye on the level and add more if necessary. Watch for air bubbles rising. - Replace the Radiator Cap
Secure it firmly, ensuring it's locked completely (usually clicks twice). Check for leaks at all hose connections and the drain bolt. - Final Check
After your first ride, let the bike cool down and recheck coolant level. Add coolant if required.
2009 Husqvarna CR125 Owner Notes
- Coolant Choice: Use only high-quality, recommended coolant to prevent internal corrosion or premature seal failure.
- System Venting: The CR125 is sensitive to air pockets. Always check for bubbles after your change and top off after the next cool-down.
- Leak Watch: Regularly inspect hoses and fittings. 2009 CR125s can develop weeping from old hose connections or a worn water pump seal. If you see green fluid at the pump or under the bike, inspect immediately.
- Vent Hose: Owners sometimes lengthen the vent hose to prevent water intrusion into the engine and help vent steam safely. Ensure yours is routed and secured properly to avoid moisture entering the oil system.
Maintaining the cooling system on your 2009 Husqvarna CR125 will help you avoid overheating, preserve engine performance, and maximize your dirt bike's lifespan. If you notice ongoing coolant loss, smoke, or water mixing with oil, address the issue promptly to prevent engine damage.
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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.