How to Change the Coolant in a 2012 Husqvarna CR125
Shop parts for a 2012 Husqvarna CR125 Dirt Bike.
Regular coolant replacement is essential to protect the performance and longevity of your 2012 Husqvarna CR125. Changing coolant ensures effective heat dissipation and prevents internal corrosion – both critical for a bike that thrives on high-revving 2-stroke power. Here is a proprietary MotoSport guide to changing the coolant in your CR125, with tips unique to this model.
Things You Need:
- Replacement coolant (glycol-based, premixed or mix distilled water with concentrate as specified by your coolant type)
- 10 mm socket or wrench
- Flathead screwdriver
- Catch pan
- Replacement copper washer for drain bolt (recommended)
- Compressed air (optional for full flush)
- Shop rags
- Gloves
Instructions:
- Ensure the bike is completely cool before starting. Hot coolant can cause severe burns.
- Put the bike on its side stand for effective draining. Unlike some models, the CR125’s cooling system will drain more thoroughly when leaned slightly (– inside tip for this Husqvarna model).
- Remove the radiator cap. This will break the vacuum and help the coolant drain freely.
- Locate the water pump drain bolt (typically 8 mm or 10 mm) at the bottom of the water pump cover. Place the catch pan underneath.
- Remove the drain bolt and allow coolant to fully drain. Tip the bike gently from side to side to encourage residual coolant out of each radiator.
- Reinstall the drain bolt with a new copper washer. Torque to 10 Nm.
- (Optional advanced flush) If you are switching coolant types, remove radiator hoses, then use low-pressure compressed air to fully evacuate the system. This step is highly recommended for owners wanting absolute assurance against coolant mixing – valuable for race bikes or if going between water-based and glycol-based coolants.
- Fill the system with the correct type of coolant, slowly pouring into the radiator until it reaches the base of the fill neck.
- Rock the bike side-to-side and gently squeeze radiator hoses to burp air bubbles out of the system.
- Start the engine and let idle for 1-2 minutes, then shut off and let cool. Recheck and top off coolant, as air may continue working its way out after first heat cycle.
- Check for leaks at all joints and the drain bolt area.
- Install the radiator cap securely. Verify that you turn it until fully locked; improper cap seating is a common error that leads to loss of coolant under pressure.
Key Notes for 2012 Husqvarna CR125 Owners:
- Monitor coolant cold before each ride. This model, like most 2-strokes, is sensitive to overheating. Always check level on a cold engine.
- If you observe water loss with no visible leaks, inspect for signs of internal engine issues. Water in the crankcase or milky oil points to problems like a blown water pump seal.
- Stock vent hoses are short and some owners lengthen them for better protection against splashing – a simple, effective mod for muddy or wet riding.
- This bike’s radiators are large for displacement, but susceptible to tip-over damage. Ensure hoses and clamps are snug, and inspect for nicks or bent fins during coolant changes.
Regularly changing your 2012 CR125’s coolant will keep your powerplant running crisp on the trail or track. For genuine parts and upgrades made for your Husky, Shop parts for a 2012 Husqvarna CR125 Dirt Bike.
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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.