How to Change the Oil in a 2023 Husqvarna TC85BW

Shop parts for a 2023 Husqvarna TC85BW Dirt Bike.

Changing the gear oil in your 2023 Husqvarna TC85BW is a critical piece of routine maintenance that keeps your dirt bike’s transmission running smoothly. Below, you'll find everything you need to know for this specific make and model, including tools, steps, and model-specific tips. This guide is proprietary to MotoSport.com.

Tools and Supplies Needed

  • Owner’s manual (for reference)
  • Motul Trans Oil or another recommended high-quality gear oil
  • Measuring cup/container (to measure 500cc of oil)
  • Drain pan (for old oil)
  • 8mm T-handle or socket (for the drain bolt)
  • New crush washer/seal ring (for the drain bolt, if needed)
  • Funnel (to prevent spills)
  • Shop towels (for cleanup)
  • Torque wrench (capable of 15 Nm–11 ft-lbs)
  • Gloves (recommended for protection)
  • Oil-absorbent pads or cardboard (to protect your work area)
  • Safe container for used oil (for later recycling)

Step-By-Step Oil Change Instructions

  • Warm up the Engine
    • Start the engine and let it idle for a few minutes. This helps the oil thin out and ensures a more complete drain.
    • Turn off the engine and place the bike on a stable stand, keeping it upright.
  • Prepare the Area
    • Place your drain pan underneath the engine, directly below the drain plug.
    • Lay down cardboard or oil-absorbent pads to catch any spills.
  • Remove the Drain Plug
    • Locate the oil drain bolt at the bottom of the engine case. It typically requires an 8mm socket or T-handle.
    • Loosen and remove the drain bolt. Watch for the crush washer/seal ring attached to the bolt; replace it if damaged.
    • Allow all oil to drain completely into the pan. Tilting the bike slightly can help remove trapped oil.
  • Inspect and Clean
    • Inspect the drain bolt and especially any magnetic areas for metal shavings—a small amount is normal, but excessive debris can indicate a problem.
    • Wipe the drain bolt and the sealing surface on the engine clean before reinstallation.
  • Reinstall the Drain Plug
    • Replace the crush washer/seal ring as necessary.
    • Hand-thread the bolt, then use your torque wrench to tighten it to 15 Nm (11 ft-lbs) as specified for the TC85’s drain plug.
  • Add Fresh Gear Oil
    • Use a measuring cup to pour exactly 500cc of new gear oil (Motul Trans Oil or equivalent) into the fill port. Overfilling or underfilling can harm the transmission.
    • A funnel is helpful to avoid spills.
  • Replace the Fill Plug and Cleanup
    • Secure the fill plug and use a shop towel to wipe away any spilled oil on the case.
    • Double-check for leaks around the drain bolt and fill plug.
  • Final Check
    • Start the engine and allow it to idle for a minute, then shut it off and check for leaks again.
    • Dispose of used oil at a licensed recycling facility. Never pour oil down the drain.

Model-Specific Call-Outs for the 2023 Husqvarna TC85BW

  • The gearbox holds 500cc (0.5L) of oil for the 2023 TC85BW. Using the correct quantity is critical for optimal performance. Overfilling can lead to clutch issues, and underfilling may cause gearbox wear or failure. Always double check the owner’s manual for changes specific to your production run.
  • Always use a new crush washer if the old one is deformed or damaged to prevent oil leaks.
  • The torque spec for the drain bolt is 15 Nm (11 ft-lbs). Over-tightening can damage the threads in the aluminum engine case.
  • Look for the magnetized drain plug. This plug catches any metal shavings and should be cleaned thoroughly at every oil change.
  • Check for oil leaks and correct fluid level after completing the oil change. On the TC85, proper oil level ensures smooth clutch and transmission function.

Pro Tips from MotoSport.com

  • Use only high-quality, manufacturer-recommended gear oil. Motul Trans Oil is a highly praised choice for performance and durability.
  • Warm up the engine before draining to ensure old oil flows out completely.
  • Change oil more frequently if you ride in sandy or muddy conditions, as contaminants can accelerate gear wear.
  • Keep a maintenance log for each oil change to stay on schedule and monitor your bike’s health.

By following these instructions and tips, you’ll keep your 2023 Husqvarna TC85BW performing at its peak every time you hit the track.

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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.