How to Change the Oil in a 2020 Husqvarna TC85BW

Shop parts for a 2020 Husqvarna TC85BW Dirt Bike.

Changing the oil regularly is essential for the longevity and reliable performance of your 2020 Husqvarna TC85BW dirt bike. Below is a robust, step-by-step MotoSport.com proprietary guide with tool lists, model-specific tips, and essential instructions for a successful oil change.

Tools and Supplies Needed

  • 8mm T-handle or socket wrench (for drain plug removal and tightening)
  • Drain pan or bucket to catch old oil
  • New gear oil: 500cc (recommended brand: Motul Trans Oil or equivalent, as used for this model)
  • Oil funnel
  • Shop towels or rags for cleaning
  • New crush washer or seal ring (if needed)
  • Torque wrench (to tighten drain plug to the correct specification: 15 Nm/11 ft-lb)
  • Gloves (recommended for personal protection)

Always work in a well-ventilated area away from heat or flame, and dispose of used oil properly.

Step-by-Step Oil Change Procedure

  1. Warm Up the Engine
    • Start the bike and let it idle for 2–3 minutes. This ensures the oil is warm and flows out smoothly.
    • Turn off the engine and position the bike upright on a stand.
  2. Prepare the Bike
    • Wipe the area around the oil fill cap and drain plug to prevent dirt from entering the engine.
    • Place the drain pan beneath the engine’s drain plug (located at the bottom of the engine case, left side).
  3. Remove the Oil Drain Plug
    • Using the 8mm T-handle or socket, carefully remove the drain plug to release the old oil.
    • Allow all oil to fully drain. Rock the bike slightly, if needed, to ensure complete drainage.
    • Inspect the drain plug’s magnet for metal shavings—a normal small amount is okay, but excessive debris could indicate internal wear.
  4. Replace the Crush Washer/Seal Ring
    • Remove the old washer and replace with a new one to prevent leaks (recommended every oil change for this model).
  5. Reinstall and Torque the Drain Plug
    • Clean the sealing surface on the engine and drain plug.
    • Reinstall the drain plug by hand to avoid cross-threading, then tighten with your wrench.
    • Use a torque wrench to tighten to 15 Nm (Newton-meters) (approx. 11 ft-lb) as Husqvarna specifies for the TC85BW .
  6. Refill with New Gear Oil
    • Place a funnel in the filler cap opening.
    • Add exactly 500cc (0.5 liters) of fresh gear oil to the transmission .
    • Reinstall the fill cap and wipe away any spilled oil.
  7. Check Oil Level
    • Start the bike and let it idle for a minute, then shut it off and let it sit for 1–2 minutes.
    • Ensure oil level is between the markings on the sight glass or dipstick (if equipped). Adjust as needed, but do not overfill.

Model-Specific Call-Outs for 2020 Husqvarna TC85BW

  • Oil Capacity: The TC85BW requires exactly 500cc of gear oil. Over- or under-filling can affect clutch and transmission performance .
  • Drain Plug Torque: Use a torque wrench to tighten to 15 Nm (11 ft-lb) for proper sealing and to avoid stripping the aluminum threads .
  • Drain Plug Magnet: Always check the magnet for debris. Excessive shavings may point to the need for further inspection.
  • Oil Type: Use a high-quality gear/transmission oil as specified by Husqvarna (Motul Trans Oil is commonly used and recommended by dealers for this model) .
  • Crush Washer: Replace the seal ring every oil change to prevent leaks—a common point of failure if re-used.

Final Steps and Oil Disposal

  • Dispose of old oil responsibly by taking it to a recycling center or approved facility—never pour oil on the ground or down a drain.
  • Wipe down all work surfaces, re-check for leaks after a short test ride, and top off oil if needed.
  • Record your oil change in your maintenance log—it’s helpful for warranty and resale.

Changing the oil in your 2020 Husqvarna TC85BW with the MotoSport.com method ensures superior performance, engine reliability, and a long lifespan for your 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.