How to Change the Coolant in a 2021 Husqvarna EE 5: A MotoSport Guide

Shop parts for a 2021 Husqvarna EE 5 Dirt Bike.

The 2021 Husqvarna EE 5 is an advanced electric dirt bike engineered for young riders, standing out with its zero-emissions powertrain and innovative cooling system. While electric, the EE 5 features a liquid-cooled motor and controller to ensure consistent performance – making regular coolant changes essential for reliability and long component life. Follow this detailed, MotoSport-exclusive guide to safely and effectively change the coolant on your EE 5.

What Makes Coolant Service Important for the EE 5?

  • Maintenance of temperature control: The liquid cooling system keeps the motor and controller at safe operating temperatures, especially during demanding rides or hot weather.
  • Prevents corrosion: Fresh coolant inhibits scale and internal corrosion that can cause expensive damage.
  • Maximizes system efficiency: Air pockets or old coolant reduce the efficiency and can result in overheating.

Before You Begin

  • Ensure the bike is fully powered down and unplugged from any charger.
  • Let the machine cool completely before removing any coolant components. The EE 5's compact system heats up quickly after use.
  • Prepare new coolant (use a high-quality, motorcycle-safe coolant – premixed or mixed with distilled water to the correct ratio if required).
  • Gather tools: Socket or Torx set, drain pan, rag, funnel, and safety gloves and glasses.

Step-by-Step Coolant Change Procedure

  1. Access the cooling system
    • Remove the seat and any plastic panels as needed to access the radiator and reservoir. The EE 5 hides its fill and drain points for protection, so patience is key.
  2. Position the bike upright using a stand. Place a drain pan under the water pump area.
  3. Remove the radiator cap slowly to relieve pressure (if present). Proceed with care; although electric systems cool faster than combustion engines, pressure may linger in the system.
  4. Drain the old coolant
    • Locate the water pump or lower radiator hose drain screw—usually on the right side of the bike. Remove the screw carefully and allow coolant to fully drain into the pan.
    • Inspect and replace any sealing washer or O-ring if worn or damaged.
  5. Reinstall the drain bolt and torque to specification (typically around 10 Nm, always follow the manual's guidance for your model).
  6. Fill the cooling system
    • Slowly add fresh coolant through the filler neck, allowing it to settle and fill. Most air will escape, but some EE 5 units have a bleeder screw at the top of the cylinder head. Crack this bleeder briefly while filling until coolant flows without bubbles, then retighten.
  7. Burb out remaining air
    • Rock the bike gently and squeeze radiator hoses (if accessible) to encourage bubbles to surface.
    • Check the coolant level again and ensure it's at the base of the filler neck. Top off as needed.
  8. Reinstall the radiator cap securely.
  9. Run a heat cycle
    • Power up the bike and gently run it until the cooling fans cycle. This helps purge final air from the system. Let cool fully, then recheck and top off the coolant if required.
  10. Reinstall plastics and seat, wiping up any spilled coolant. Dispose of old coolant at an approved recycling center.

Special EE 5 Notes for Owners

  • Electric architecture: The EE 5's electric motor requires the cooling system to always be in top shape. Never run the bike if coolant is low or absent.
  • Bleeding is crucial: Air pockets will disrupt controller cooling – always bleed per above if the bike overheats or throws temperature warnings.
  • System compatibility: Use only coolants compatible with aluminum radiators and electric motorcycles to prevent deposit buildup.

Quick Maintenance Intervals

  • Inspect coolant level before every ride.
  • Replace coolant annually, or more often if harsh conditions or high usage is common.

Trust MotoSport.com for all your 2021 Husqvarna EE 5 maintenance and performance needs—and always ride safe.

Related Shopping Categories

Shop Radiators for a 2021 Husqvarna EE 5 Dirt Bike.

Shop Coolant for a 2021 Husqvarna EE 5 Dirt Bike.

Shop Temperature Sensors for a 2021 Husqvarna EE 5 Dirt Bike.

Shop Tools for a 2021 Husqvarna EE 5 Dirt Bike.

Shop Radiator Hoses for a 2021 Husqvarna EE 5 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.