How to Change the Oil in a 2021 Husqvarna TC85

Shop parts for a 2021 Husqvarna TC85 Dirt Bike.

Changing the oil in your 2021 Husqvarna TC85 is a key maintenance step to ensure the longevity and optimal performance of your dirt bike. This step-by-step guide, proprietary to MotoSport.com, will detail the process, highlight required tools, and note important call-outs unique to the TC85 for a safe and effective oil change.

Tools and Supplies Needed

  • 8mm and 13mm socket or T-handle wrench
  • Torque wrench (capable of 15 Nm)
  • Drain pan
  • Funnel
  • Crush washer (recommended replacement)
  • Rags or shop towels
  • Motul Trans Oil or your preferred transmission oil (500 cc / 0.5 L)
  • Safety gloves and safety glasses

Preparation: Safety and Setup

  • Ensure the bike is on a stable and level surface.
  • Warm up the engine for a minute to thin the oil for easier draining, then shut it off.
  • Allow the bike to cool slightly before proceeding to avoid burns.
  • Remove the skid plate (if fitted) to access the drain plug.
  • Clean the area around the drain and fill plugs to prevent contamination.

Step-by-Step Oil Change Instructions

  1. Remove the Drain Plug
    • Place your drain pan under the bike's transmission case.
    • Use a 13mm wrench to remove the transmission drain plug located at the bottom of the transmission case.
    • Let the old oil fully drain into the pan. Allow extra time for complete drainage.
  2. Inspect and Replace Crush Washer
    • Inspect the crush washer on the drain plug; replace it if worn to ensure a proper seal and prevent leaks.
  3. Reinstall and Torque the Drain Plug
    • Clean the drain plug threads and reinstall it with the new (or cleaned) crush washer.
    • Torque the drain plug to 15 Nm (Newton-meters). Do not overtighten.
  4. Add New Transmission Oil
    • Remove the transmission fill plug using the appropriate wrench or T-handle.
    • Using a funnel, pour exactly 500 cc (0.5L) of Motul Trans Oil or recommended gear oil into the fill hole

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    • Check the oil level: For the TC85, oil should be at the bottom of the gear oil level screw hole

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    • Reinstall and finger-tighten the fill plug, then final tighten with a wrench. Be careful not to over-tighten.
  5. Check for Leaks and Clean Up