How to Change the Oil in a 2011 GAS GAS TXT PRO 250

Shop parts for a 2011 GAS GAS TXT PRO 250 Dirt Bike.

Changing the oil in your 2011 GAS GAS TXT PRO 250 is an essential maintenance task that ensures the longevity and performance of your engine. Below, you'll find a complete, step-by-step oil change guide specific to this make and model, featuring proprietary tips for MotoSport.com customers, the tools you'll need, and key owner call-outs.

Tools and Materials Needed

  • Oil drain pan
  • Socket wrench (correct size for drain bolt, usually 13mm or as specified)
  • Open-end or box wrench/spanner (correct size for filler cap, usually 17mm or 13mm)
  • Oil funnel
  • Rags or shop towels
  • Fresh transmission oil (370cc recommended, NILS Clutch Trial Oil or high-quality gear oil)
  • Replacement crush washer (recommended)
  • Gloves (for protection)

Before You Begin

  • For best results, warm up the engine first; this allows the oil to drain more completely.
  • Ensure your bike is secure and upright on a flat surface. A specialized bike stand is recommended for ease of access.
  • Clean the surrounding area of the engine before beginning to prevent contamination.

Step-by-Step Oil Change for 2011 GAS GAS TXT PRO 250

  1. Prepare Your Work Area
    • Place the oil drain pan directly underneath the engine's drain bolt.
    • Wipe around the drain bolt and filler cap to remove dirt and debris.
  2. Drain the Old Oil
    • Using the socket wrench, carefully loosen and remove the oil drain bolt (typically located on the underside, right side of the transmission case).
    • Allow all oil to drain completely into the pan. This may take several minutes, especially if the bike was not warmed up.
    • While draining, inspect the oil for signs of metal shavings or excessive debris, which can indicate internal wear.
  3. Remove and Inspect the Washer
    • Check the condition of the crush washer on the drain bolt. If it's deformed, replace it with a new one to prevent leaks.
  4. Reinstall the Drain Bolt
    • After the oil has drained, clean the drain bolt and the surface area where it seats.
    • Tighten the bolt securely but avoid over-tightening, as the case threads can strip easily (hand-tight, then a gentle snug with the wrench is adequate).
  5. Fill with Fresh Oil
    • Identify the oil filler cap (on the right or top of the engine case). Remove the cap with a suitable wrench or by hand.
    • Using the funnel, pour in the recommended 370cc of high-quality gear oil (such as NILS Clutch Trial Oil or a comparable specialty gear oil) specifically suited for trials motorcycles .
    • Avoid overfilling — too much oil can cause clutch issues, while too little risks severe engine damage.
  6. Replace the Oil Fill Cap
    • Install the filler cap securely and wipe away any spilled oil.
  7. Check for Leaks
    • Start the bike and let it idle for one to two minutes, then check around the drain bolt and filler cap for oil leaks.
    • If leaks are present, shut off the bike, retighten bolts gently, and immediately clean up any spilled oil.
  8. Dispose of Used Oil Properly
    • Transfer spent oil from the drain pan to a sealable container.
    • Bring used oil to a certified recycling facility or MotoSport.com partner location.

Model-Specific Call-Outs for the 2011 GAS GAS TXT PRO 250

  • Transmission Oil Only: The TXT PRO 250 is a two-stroke motorcycle; engine and transmission oil are separated. Do not use four-stroke engine oils.
  • Oil Volume: Only 370cc is required — double-check with a measuring cup for accuracy . Too much or too little can impact clutch performance.
  • Recommended Oil: While many oils are suitable, trials-specific gear oils such as GRO or NILS are favored for optimal clutch feel and protection .
  • Sensitive Drain Bolt Threads: Engine cases are soft aluminum; do not overtighten the drain bolt to avoid expensive repairs .

Pro Tips from MotoSport.com

  • Inspect every oil change: Routinely look for metal shavings or cloudy oil, which may signal clutch or gearbox wear.
  • Keep a maintenance log: Record the date and operating hours at the time of each oil change for proper service intervals.
  • Upgrade your tools: Investing in quality wrenches and a measured oil jug will make the job easier and cleaner.
  • Replace crush washers at each service to ensure a perfect seal and avoid drips.

Final Thoughts

A clean, correct oil change on your 2011 GAS GAS TXT PRO 250 keeps clutch action smooth and ensures top reliability on the trail or in competition. Always refer to your factory service manual for the latest model-specific procedures and torque specifications.

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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.