How to Change the Coolant in a 2012 Husqvarna WR250: Step-by-Step Guide
Keeping your 2012 Husqvarna WR250 running cool under pressure means staying on top of essential maintenance – including regular coolant changes. While this classic two-stroke offers robust off-road performance, making sure its liquid-cooling system operates at peak efficiency is critical for durability and power delivery, especially during hard rides or races.
What Makes the WR250 Cooling System Unique?
The 2012 WR250 features a liquid-cooled two-stroke engine with a robust yet simple cooling circuit. Unlike many modern four-strokes with overflow reservoirs, the WR250 employs a straightforward radiator setup, making coolant servicing relatively approachable. However, tight clearances around the radiator hoses and engine mean you should use care when removing components to avoid damaging soft aluminum fittings.
Recommended Tools & Supplies
- Fresh motorcycle-specific coolant (non-silicate, ethylene glycol based)
- Distilled water (if mixing concentrate)
- Socket set & screwdrivers
- Drain pan
- Shop towels or rags
- Funnel
- Protective gloves & eye protection
Step-by-Step Coolant Change Procedure
- Preparation
Make sure the bike is completely cool to the touch. Hot coolant and pressurized systems can cause severe burns. Place the bike securely on a stand with enough space to access both radiators and hoses. - Remove the Radiator Cap
Locate the radiator cap on the left radiator. Slowly loosen and remove the cap to release pressure. - Drain Old Coolant
Some WR250s feature a small coolant drain bolt on the lower right side of the water pump cover. Position your drain pan underneath. Remove the bolt and allow coolant to flow out. To ensure full drainage, it is helpful to slightly rock the bike side-to-side.
If there is no dedicated drain bolt, you can loosen the lower radiator hose on the right-side radiator. Allow coolant to drain completely from the hose and engine cavity. - Flush (Optional but Recommended)
If your coolant appears dirty, or you are switching coolant types, flush the system with distilled water. Reinstall the drain bolt (or hose) temporarily, fill the radiator with distilled water, run the engine briefly, then drain again. Repeat until clean water flows. Avoid tap water, which introduces minerals that can damage the system. - Reinstall Drain Bolt or Hose
Replace and tighten the drain bolt to the manufacturer specified torque, or reinstall and tighten the lower hose securely. - Refill with Coolant
Using a funnel, fill the radiator to just below the filler neck with the correct motorcycle coolant. If using a concentrate, pre-mix 50/50 with distilled water. - Remove Air (Burp the System)
Air pockets can cause poor cooling or engine damage. With the radiator cap still off, start the bike and let it idle for 2–3 minutes. Gently rock the bike and briefly rev the engine a few times. Watch for bubbles escaping from the radiator opening.
Once the bubbles stop and coolant level drops, top off with more coolant until level stabilizes. - Reinstall Radiator Cap
Once filled, replace the cap securely. - Clean Up & Check for Leaks
Wipe any coolant spills and double-check the drain bolt/hose for leaks. Dispose of used coolant responsibly – never pour into drains or on the ground.
Model-Specific Notes for the 2012 WR250
- The WR250 lacks a coolant overflow tank, so topping the radiator itself is the only way to set fluid level. Never overfill. – Leave a small air gap at the top of the neck.
- Inspect hoses and clamps during coolant service – aging hoses can split or leak, especially after a harsh season.
- Racing or hard trail riding in hot environments? Consider a high-heat coolant or adding auxiliary radiator guards for maximum cooling protection.
- Frequent coolant changes are recommended if you ride in muddy or debris-filled environments, as radiator fins can clog and reduce efficiency.
Final Tips
- Always check cooling capacity and bolt torque values in your 2012 WR250 owner's manual.
- Start the bike and let it reach normal temperature, then recheck coolant level after cooling down. Top off if necessary.
Routine coolant changes are essential maintenance for your WR250.
Related Shopping Categories
Shop Radiators for a 2012 Husqvarna WR250 Dirt Bike.
Shop Coolant for a 2012 Husqvarna WR250 Dirt Bike.
Shop Temperature Sensors for a 2012 Husqvarna WR250 Dirt Bike.
Shop Tools for a 2012 Husqvarna WR250 Dirt Bike.
Shop Radiator Hoses for a 2012 Husqvarna WR250 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.