How to Change the Coolant in a 2017 Husqvarna TC85BW

Shop parts for a 2017 Husqvarna TC85BW Dirt Bike.

Regular coolant changes are vital to keep your 2017 Husqvarna TC85BW running cool under pressure and prevent costly engine damage. Below is a detailed, model-specific guide from MotoSport on how to safely and efficiently flush and refill the coolant in your TC85BW. Owners should note that the TC85BW, sharing most core technical aspects with the TC 85 17/14, uses a high-performance 2-stroke engine and is designed for youthful racers demanding high-output in a lightweight frame. Proper cooling is essential for performance and reliability.

Tools & Supplies Needed

  • New coolant compatible with aluminum engines
  • Drain pan
  • 8mm socket or T-handle
  • Shop rags
  • Funnel
  • Gloves & safety glasses

Step 1: Prepare the Motorcycle

  • Let the bike cool completely before beginning hot coolant can cause serious burns.
  • Position the motorcycle upright on a stand for stability.
  • Remove the radiator shrouds if needed for easier access.

Step 2: Drain the Old Coolant

  • Place a drain pan under the water pump cover (lower right side of the engine).
  • Locate the coolant drain screw on the water pump cover and carefully remove it using an 8mm socket.
    On the TC85BW, the drain screw is typically marked, but if unsure, consult your owner's manual for illustration.
  • Remove the radiator cap to allow the system to vent and fully drain.
    Allow the coolant to empty completely into your pan.

Step 3: Reinstall the Drain Screw

  • Inspect the drain screw washer for damage replace if needed to prevent leaks.
  • Reinstall and firmly tighten the drain screw.

Step 4: Fill New Coolant

  • Using a funnel, slowly pour new pre-mixed coolant into the radiator filler neck until full.
  • On the TC85BW, ensure you are using coolant suitable for modern aluminum 2-stroke engines.
  • Refill until the coolant level reaches the bottom of the filler neck.
    If your coolant system features a bleed screw (as seen on some KTM and Husqvarna 85cc models), briefly loosen it to allow trapped air to escape, then retighten.

Step 5: Bleed & Cycle the Cooling System

  • Reinstall the radiator cap securely.
  • Start the engine and let it idle for a few minutes to circulate the coolant.
    Watch for any leaks from the drain bolt or hoses.
  • Shut off the bike and let it cool.
  • Remove the radiator cap again and check the level top off as needed.

Step 6: Final Inspection

  • Double-check all fasteners for tightness.
  • Reinstall shrouds if removed.
  • Wipe up any spilled coolant it's slippery and toxic to pets.
  • Safely dispose of old coolant according to local regulations.

Key Notes & Maintenance Reminders for TC85BW Owners

  • Coolant capacity for this engine is limited – never overfill or dilute.
  • Always use coolant pre-mixed with distilled water; tap water can lead to corrosion or deposits inside the cooling system.
  • Check coolant level before every ride, especially in racing or high-heat conditions.
  • Inspect hoses and radiator for damage during coolant changes - minor leaks can seriously impact performance.

Maintaining your Husqvarna TC85BW's cooling system is simple but critical for race-day reliability and engine life. MotoSport's parts directory makes it easy to find gaskets, coolant, and every part needed for your next service.

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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.