How To Change the Oil in a 2020 Husqvarna TC125: MotoSport.com Expert Guide

Shop parts for a 2020 Husqvarna TC125 Dirt Bike.

Regular oil changes are crucial to keeping your 2020 Husqvarna TC125 running smoothly and maximizing engine longevity. In this guide, exclusive to MotoSport.com, you'll find a thorough, step-by-step process tailored to this exact model year, including the unique requirements to ensure a successful oil change every time.

Tools & Materials Needed

  • 13mm box wrench (for oil drain bolt)
  • Drain pan for used oil
  • Rags/paper towels for cleanup
  • Brake cleaner or degreaser (to clean components)
  • Replacement crush washer for drain bolt (recommended)
  • Funnel for refilling oil
  • 800ml of quality 10W-50 engine oil (see note below)
  • Torque wrench (optional for precision)
  • Rubber gloves (for personal protection)

Note: Factory Racing Parts 10W50 Oil Change Kits are compatible with Husqvarna TC125 from 2014–2022 and are recommended for optimal performance.

Step-by-Step Oil Change Instructions for the 2020 Husqvarna TC125

  1. Warm the Engine
    Start the bike and let it idle for 2-3 minutes. Warming the engine helps the oil drain more efficiently and carries contaminants out with it when drained.
    Tip: Be sure not to let the engine get too hot to avoid burns when handling components later.
  2. Turn Off and Secure the Bike
    Place the TC125 on a flat, stable surface, ideally using a bike stand.
  3. Remove the Drain Plug
    Locate the drain plug beneath the engine and use a 13mm box wrench to carefully loosen and remove it, allowing the oil to flow into your drain pan.
    Let the oil fully drain. Give it several minutes for a complete drain.
  4. Inspect & Clean Components
    • Check the drain plug and its crush washer for excessive wear or damage. Replace the washer if necessary.
    • Wipe down the area around the drain hole and clean any oil residue.
    • If equipped, inspect any oil screens or filters during this time, cleaning or replacing as needed.
  5. Reinstall the Drain Plug
    Ensure the crush washer is in place, then reinstall the drain plug by hand to prevent cross-threading. Tighten securely with your 13mm wrench. If using a torque wrench, the recommended torque setting for similar Husqvarna models is approximately 14.8 ft-lbs (20 Nm).
  6. Add Fresh Oil
    Remove the oil fill cap (on the right side of the engine) and set it aside. Using a clean funnel, pour exactly 800ml of 10W-50 engine oil into the engine.
    • Double-check your oil type: Husqvarna specifies 10W-50 for the TC125.
    • Do not overfill. Pour slowly and let it settle before rechecking the level.
  7. Reinstall Fill Cap
    Once the proper oil volume is in, reinstall the fill cap securely.
  8. Check for Leaks
    Wipe down any spilled oil from the engine and beneath the drain bolt. Start the engine and let it idle for 1–2 minutes, then shut it off and inspect around the drain bolt and fill cap for signs of oil seepage. Address any leaks promptly before riding.
  9. Proper Oil Level Verification
    • Let the bike sit upright for a minute after running it, then check the oil level through the inspection window (if equipped) or as specified by your model’s manual.
    • Add more oil if necessary, but never exceed the 800ml fill specification.
  10. Recycle Old Oil
    Dispose of your used oil and filter at an environmentally responsible recycling facility or an appropriate collection point.

2020 Husqvarna TC125 Specific Call-Outs

  • The 2020 TC125 uses a separate gear oil compartment—do not confuse this with premix or transmission fluid duties.
  • Exact oil capacity is 800ml (0.84 quarts). Overfilling can potentially damage internal components.
  • When cleaning around the oil fill and drain areas, ensure all debris is cleared to prevent contamination during reassembly.
  • After washing the bike or riding in wet conditions, thoroughly dry and clean the drain area before removing plugs, as water or mud can compromise fresh oil.
  • If you encounter a stubborn bolt, inspect for melted or fused debris—clean and remove as needed without forcing the bolt to avoid damaging threads.

Tips for a Reliable Oil Change Every Time

  • Stick to a regular maintenance schedule—change oil after every 8-10 hours of riding, or sooner in harsh conditions.
  • Always use high-quality oil compatible with modern two-stroke transmissions.
  • Replace the crush washer each time for best leak prevention.
  • Keep a log of oil changes for optimal maintenance tracking. This is especially valuable for resale and warranty claims.

By following these detailed steps and recommendations, you’ll ensure your 2020 Husqvarna TC125 stays in peak condition for seasons to come—brought to you by the experts at MotoSport.com.

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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.