How to Change the Oil in a 2025 Husqvarna TX300–Comprehensive DIY Guide

Shop parts for a 2025 Husqvarna TX300 Dirt Bike.

Keeping your 2025 Husqvarna TX300 running at peak performance means regular oil changes. This guide, proprietary to MotoSport.com, delivers step-by-step instructions designed just for the 2025 model, ensuring you have the tools, the process, and all the vital tips and Husqvarna-specific insights you need for a flawless oil change.

Tools & Supplies Needed

  • 8mm and 13mm sockets or wrenches
  • Torque wrench (for correct drain bolt reinstallation)
  • Drain pan (durable, large enough for at least 1 liter)
  • Measuring cup (for accurate refill)
  • Funnel (to avoid spilling new oil)
  • Fresh 10W-40 2-stroke transmission oil (800ml for the TX300)
  • New crush washer for the drain bolt
  • Contact cleaner or brake cleaner (optional, for cleaning up around the drain bolt)
  • Nitrile gloves (for clean hands)
  • Rags or shop towels

Preparation

  • Run your Husqvarna TX300 for 3–5 minutes to warm the transmission oil. This thins the oil and helps contaminants suspend, making draining more effective.
  • Place the bike upright on a stand in a well-ventilated area.
  • Gather all your tools and supplies within arm’s reach.

Step-by-Step Oil Change Instructions

  1. Remove the Skid Plate (if equipped):
    • Loosen and remove the skid plate bolts for easier access.
  2. Locate the Drain Bolt:
    • On the TX300, the transmission oil drain bolt is found on the lower left side of the engine case. Place the drain pan directly beneath it.
  3. Remove the Oil Fill Cap:
    • The fill cap is on the clutch cover. Removing it allows oil to drain smoothly.
  4. Loosen and Remove the Drain Bolt:
    • Use your socket to carefully remove the drain bolt, avoiding any hot surfaces. Be ready to catch the bolt so it doesn’t tumble into the pan or onto the ground.
    • Let all the old oil thoroughly drain out. This should take several minutes.
  5. Inspect and Replace the Crush Washer:
    • Always replace the crush washer. Using a new one ensures a tight, leak-free seal when you reinstall the drain bolt.
  6. Clean and Reinstall the Drain Bolt:
    • Wipe down the drain bolt and install the new crush washer.
    • Screw the drain bolt in by hand to avoid cross-threading, then use your torque wrench set to the manufacturer’s specification (check your owner’s manual for 2025 specs) to secure it properly. Do not overtighten.
  7. Add New Oil:
    • Place a funnel in the fill hole. For the 2025 TX300, pour in exactly 800ml of approved 10W-40 2-stroke transmission oil.
    • Go slowly and pause halfway to allow settling and prevent overfilling. Most owners use a measuring cup for this step for maximum precision.
  8. Reinstall the Fill Cap:
    • Tighten the fill cap securely.
  9. Check for Leaks:
    • Wipe down the area around the drain bolt and start the bike.
    • Let it idle for a minute, then inspect for leaks.
  10. Reinstall Skid Plate (if removed):
    • Secure the skid plate using the correct torque for its bolts.

Special 2025 Husqvarna TX300 Oil Change Notes

  • Oil Volume: The correct oil amount for the TX300 is 800ml. Overfilling may cause excess pressure or leaks–underfilling will reduce gearbox protection.
  • Crush Washer Replacement: Always use a new crush washer with each oil change for a leak-free seal.
  • Oil Type: Husqvarna recommends B EXL 10W-40 oil, but any high-quality 2-stroke transmission/gear oil meeting manufacturer standards is acceptable.
  • Interval: Change the oil every 10–15 hours of riding, depending on conditions. New bikes or those recently serviced should have their first oil change sooner, especially to inspect for break-in contaminants.
  • Watch for Signs of Metal Debris: It’s normal to spot a little metallic paste on the drain plug magnet and in the oil during break-in, but watch for large metal flakes or an unusual amount of debris as this signals potential internal wear or failure.

Pro Tips for a Clean Job

  • Place a strip of foil or cardboard under the drain area to guide oil past the frame and skid plate for less mess.
  • Use nitrile gloves and plenty of rags–transmission oil is tough to remove from skin and gear.
  • Double-check the oil level after a quick ride, as it may settle after initial filling.

Disposal

  • Properly recycle your used oil at a local auto store or hazardous waste center. Never dump old oil on the ground or down the drain.

By maintaining your oil the MotoSport.com way, you protect your 2025 Husqvarna TX300’s transmission and maximize riding reliability for every adventure.

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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.