How to Change the Oil in a 2021 Husqvarna TC50: The Complete MotoSport.com Guide

Shop parts for a 2021 Husqvarna TC50 Dirt Bike.

Regular oil changes are one of the most important maintenance tasks for your 2021 Husqvarna TC50. Not only do they keep your bike running smoothly on the track and trail, but they also protect crucial engine and clutch components from premature wear. This guide is proprietary to MotoSport.com and covers every essential step, tool, and unique tip for TC50 owners.

Tools & Supplies Needed

  • New gear oil (consult your owner's manual or dealer for the recommended viscosity and quantity for the TC50; many use 10W-40 or a specific gear oil blend)
  • Measuring cup (for accurate oil fill)
  • Funnel (a small, clean funnel eases filling and avoids spills)
  • Socket wrench with 13mm socket (or size as required for the oil drain plug)
  • Torque wrench (crucial for proper plug torque)
  • Oil drain pan or container (to catch old oil)
  • Clean rags or shop towels (for cleanup)
  • New sealing washer or crush washer (for the drain plug, highly recommended for preventing leaks)
  • Gloves (to keep hands clean and protected)

Step-by-Step: 2021 Husqvarna TC50 Oil Change

  • Warm Up the Engine
    Start the bike and let it idle for a few minutes. This helps the oil flow better during drainage, carrying away more debris and contaminants.
  • Secure the Bike
    Place your TC50 on a stand so it’s upright on a level surface. This is essential for getting an accurate oil fill and effective drainage.
  • Remove the Oil Fill Cap
    Unscrew and remove the oil fill plug (usually located on the side of the engine) to allow air to enter as you drain the old oil.
  • Drain the Old Oil
    • Place the oil pan directly beneath the drain plug (typically on the bottom or side of the crankcase).
    • Use your 13mm socket to carefully loosen and remove the oil drain plug. Note: The drain plug may have a magnet – clean off any debris from it thoroughly.
    • Allow all old oil to fully drain. This may take a few minutes.
  • Clean the Drain Plug and Sealing Surface
    Wipe the drain plug (especially the magnet, if present) and ensure the sealing surface on the engine is spotless. Replace the crush washer with a new one if possible (highly recommended for preventing leaks).
  • Reinstall the Drain Plug
    Reinstall the plug by hand to avoid cross-threading, then tighten it with your torque wrench to 6 Nm (4.4 lbf ft) for M6 plug, or 20 Nm (14.8 lbf ft) for M12x1.5 plug, as specified in your manual and on your specific TC50 model. Overtightening can damage the threads or crush washer

    .
  • Add Fresh Oil
    • Use your measuring cup to pour in the exact quantity of new oil. Overfilling or underfilling can impair clutch and engine performance.
    • Use your funnel to avoid spills and direct oil into the fill hole.
    • On the 2021 TC50, the typical oil quantity is approximately 200 mL, but always verify with your specific owner’s manual or sticker under the seat

      .
    • Reinstall the fill plug securely—but do not overtighten.
  • Wipe and Check for Leaks
    Wipe any excess oil, then start the engine and let it run for a minute. Check around the drain plug and fill cap for leaks.
  • Check Oil Level
    With the bike upright and the engine off, check the oil level using the inspection bolt (if present) or via the fill port, as described in your manual. Add oil if necessary to reach the proper level

    .
  • Dispose of Old Oil Properly
    Pour the used oil into a sealed container and take it to a recycling facility or approved auto/motorcycle shop. Never dispose of oil in drains or on the ground.

2021 Husqvarna TC50 Model-Specific Call-Outs

  • The TC50 uses a wet clutch system, so a motorcycle-specific oil is essential. Do not use generic automotive oils.
  • The drain plug usually includes a magnetic tip: routinely check and clean metal filings to spot early signs of wear.
  • Always torque the drain bolt—guessing can lead to leaks or stripped threads.
  • The small total oil quantity (about 200 mL) means even minor over- or underfilling matters.
  • On newer models, a "gear oil level" bolt may be present: Use this to double-check oil height after filling.

Pro Tips for MotoSport.com Riders

  • Change the oil every 5–10 hours of ride time, or after every race for optimum engine and clutch protection.
  • If you ride in muddy or sandy conditions, consider changing oil more often due to contaminants.
  • Keep a dedicated log of your oil changes and any debris found on the drain plug magnet for long-term monitoring.

Ride On: Respect Your Bike, Respect Your Oil

Consistent and correct oil maintenance is one of the best ways to keep your 2021 Husqvarna TC50 running strong. Always use the recommended grade, the correct volume, and proper procedures. For racing, training, or trail riding, MotoSport.com is here to make sure you keep riding—smarter, faster, and longer.

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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.