How to Change the Oil in a 2020 GAS GAS TXT RACING 300

Shop parts for a 2020 GAS GAS TXT RACING 300 Dirt Bike.

Proper maintenance ensures your 2020 GAS GAS TXT RACING 300 delivers maximum performance and longevity. Routine oil changes are vital for preserving your engine and clutch, helping your bike tackle any terrain you throw at it. MotoSport.com provides this proprietary guide to thoroughly walk you through the process for your TXT RACING 300.

Tools and Supplies Needed

  • Socket wrench set (ensure you have the correct size spanner for the drain plug–double check before starting.)
  • Oil catch pan
  • Funnel
  • Clean rags or shop towels
  • Gloves (optional, but keeps hands cleaner)
  • Replacement oil – Use a high-quality oil formulated for 2-stroke transmissions or gearbox/clutch (check your owner's manual or favorite supplier, such as AMSOIL or GRO gear oil)
  • Replacement crush washer for the drain bolt (recommended, optional)

Step-by-Step Oil Change Instructions

  1. Warm Up the Engine
    Run the engine for a few minutes to warm the oil. This thins the oil and allows more contaminants to flush out.
  2. Position the Bike
    Place your bike upright on a stable stand. Place your oil catch pan under the drain bolt.
  3. Remove the Drain Plug
    Locate the oil drain bolt on the bottom of the engine case. Use the correct size socket or spanner–double check it's the right size. Loosen and remove the drain plug, allowing the old oil to fully drain into your catch pan. Allow several minutes for full drainage.
  4. Inspect & Clean the Area
    While the oil drains, wipe the drain plug clean. If you notice metal shavings or debris on the drain plug magnet, that could indicate excessive engine or clutch wear.
    Also inspect the crush washer and replace if it's flattened or damaged.
  5. Reinstall the Drain Plug
    Once drainage is complete, reinstall the drain plug with a fresh crush washer (if possible). Tighten the bolt firmly but do not overtighten. Many stripped drain bolt threads are caused by excessive force–“snug” is enough.
  6. Add Fresh Oil
    Locate the gearbox/engine oil fill cap at the top of the engine. Place a clean funnel in the fill port and slowly pour in the recommended volume and type of oil for your TXT RACING 300 (consult your owner's manual or supplier listing). Most riders use a specialized gear or transmission oil formulated for off-road use–GRO, Motul, or AMSOIL are popular choices as recommended onlineShop Oil for a 2020 GAS GAS TXT RACING 300 Dirt Bike..
  7. Check the Level
    With the bike level, check the oil sight window or dipstick (if fitted) to ensure you have added the correct amount. Oil should reach the designated mark. Overfilling can cause clutch issues.
  8. Clean Up
    Wipe any drips or oil residue from the engine cases, especially near the fill and drain areas. Dispose of your old oil at an appropriate recycling center.
  9. Final Step: Inspect the Clutch and Air Filter
    For thorough maintenance, consider checking your air filter (clean/replace as necessary) as part of your oil change routine. A dirty filter can restrict engine airflow and reduce performance.

Specific Call-Outs for the 2020 GAS GAS TXT RACING 300

  • Drain Plug Location: The TXT RACING 300's oil drain is accessed from underneath the right side of the engine; some users have noted it can be slow to drain, so patience helpsShop Drain Plugs for a 2020 GAS GAS TXT RACING 300 Dirt Bike..
  • Don't Overtighten: The aluminum case threads can strip if the plug is overtightened—a “snug, not tight” fit is critical for longevityShop Drain Plugs for a 2020 GAS GAS TXT RACING 300 Dirt Bike..
  • Oil Choice: Variations in rider preference exist, but ensure you're using a specialist gear or transmission oil for 2-stroke gearboxes (avoid basic motor oil for these applications). GRO, Motul, and AMSOIL are well-ratedShop Oil for a 2020 GAS GAS TXT RACING 300 Dirt Bike..
  • Service Interval: Recommended by most sources every 4,000 miles/6,000 km, or more frequently if riding in harsh or dirty conditionsShop Oil for a 2020 GAS GAS TXT RACING 300 Dirt Bike..
  • Sight Glass: Some 2020 TXT RACING 300s include a gearbox sight glass, making checking oil levels easier. If your model does not, use a measured pour and double check against the manual's recommended quantity.
  • Thread Care: Always inspect threads on drain bolt and engine case; clean and ensure no grit remains before reinstalling the drain bolt.

Expert Tip

If you ride in severe conditions (mud, water crossings, frequent clutch use) consider changing your oil more frequently than the manual's interval for best longevity and reduced gearbox wear.

Finishing Up

  • Start the engine and let it idle for a minute, then switch off and check for leaks at the drain and fill ports.
  • Double check the oil level after a short ride and top off if needed.

Congratulations. With these steps from MotoSport.com, your 2020 GAS GAS TXT RACING 300 will be ready to take on any challenge with protected internals.

Related Shopping Categories

Shop Motor Oil for a 2020 GAS GAS TXT RACING 300 Dirt Bike.

Shop Oil Filters for a 2020 GAS GAS TXT RACING 300 Dirt Bike.

Shop Oil Drain Pans for a 2020 GAS GAS TXT RACING 300 Dirt Bike.

Shop Tools for a 2020 GAS GAS TXT RACING 300 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2020 GAS GAS TXT RACING 300 Dirt Bike.

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.