How to Change the Coolant in a 2007 Husqvarna WR250: Complete MotoSport Guide
Shop parts for a 2007 Husqvarna WR250 Dirt Bike.
The 2007 Husqvarna WR250 is renowned for its robust two-stroke motor and competition-proven reliability. Whether you ride for fun or race on the weekends, keeping your cooling system in top condition is crucial–especially with the unique European design of the WR250. Changing your coolant regularly keeps your engine temperature in check, extends engine life, and prevents expensive damage. Here‘s how to change the coolant on this MMY, with notes specific to the Husky WR250:
What You‘ll Need
- Fresh motorcycle coolant (pre-mixed or concentrated with distilled water)
- 8mm socket, Phillips screwdriver, and Allen keys
- Drain pan
- Funnel
- Shop rags
- Gloves & safety glasses
Step-by-Step Coolant Change: WR250
- Cool Down the Motor: Ensure the WR250 is completely cool. A hot pressurized system can spray coolant – wait at least one hour after any ride.
- Remove Plastics and Tank (if required): Remove the left radiator shroud. For easier access, many owners also tilt the gas tank upward after disconnecting the petcock and vent lines.
- Locate the Coolant Drain Bolt: The 2007 WR250 has a coolant drain bolt on the lower water pump housing or underneath the cylinder on the right side. Place your drain pan below this area.
- Drain Old Coolant: Remove the coolant drain bolt and the radiator cap. Allow all coolant to fully drain. Tilt the bike gently from side to side; open the radiator hose at the base if you want a more thorough flush.
- Flush if Needed: If your coolant is dirty or old, pour distilled water through the system and let it drain completely. Repeat until the water comes out clean. Reinstall and torque the drain bolt (replace the sealing washer if necessary to prevent leaks).
- Refill Coolant: Using a 50/50 pre-mix or mix with distilled water, slowly fill the radiator up to the very top of the filler neck, covering the internal fins but not overfilling. On Husqvarnas, overfilling can cause overflow through the vent line – keep the fluid just at the base of the neck.
- Bleed Air ("Burp" the System): With the radiator cap still off, start the bike and let it idle for a couple minutes. Rock the bike gently side-to-side or blip the throttle to release trapped air bubbles. Add coolant as needed until the level stabilizes.
- Top Off & Replace Cap: Once no more bubbles appear and the level stops dropping, top it up to the bottom of the filler neck and reinstall the radiator cap securely.
- Check Reservoir (if equipped): The WR250 typically has no overflow bottle, but if yours has an aftermarket reservoir, fill it to the indicated "Full" line.
- Clean Up: Reinstall any shrouds, tank, seat, and plastics. Wipe away any spilled coolant. Run the engine up to temperature and check for leaks after your first ride.
2007 WR250 Model-Specific Tips
- Keep an Eye on Coolant Consumption: The WR250's large bore two-stroke can run hot under sustained load. If you see a drop in coolant or frequent overflow, check your radiator cap and water pump seals, as these are common wear items for this model.
- Proper Coolant Level: Filling all the way to the top may cause the Husky to expel excess after the first heat cycle. Fill only up to cover the radiator core but not above the fins–this avoids overflow issues reported by WR250 owners.
- Overheating Issues: Persistent overheating or coolant pushing out of the overflow may indicate a bad head gasket, warped cylinder head, or worn water pump. If fresh coolant doesn't solve a recurring problem, inspect these areas closely.
- Dispose of Old Coolant Properly: Used coolant is toxic–collect it for recycling at an auto parts store or hazardous waste center.
Stay proactive with your cooling system and the Husqvarna WR250 will reward you with power and reliability on every ride.
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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.