How to Change the Oil in a 2014 GAS GAS TXT PRO 280

Shop parts for a 2014 GAS GAS TXT PRO 280 Dirt Bike.

Changing the oil in your 2014 GAS GAS TXT PRO 280 is one of the most important routine maintenance tasks to keep your trials bike running smoothly and performing at its best. Follow this in-depth, step-by-step guide from MotoSport.com to ensure a clean and efficient oil change, specifically tailored to your ride.

Tools and Supplies Needed

  • Socket set (correct size drain bolt socket or spanner, typically 10mm or 13mm for GAS GAS models)
  • Torque wrench (for correct reinstallation of drain plug)
  • Flathead screwdriver (for removing oil fill plug, if needed)
  • Drain pan
  • Rags or shop towels
  • Funnel (preferably with a narrow spout)
  • New transmission oil – GAS GAS recommends synthetic or semi-synthetic gear oil; approximately 370 ml capacity for the TXT PRO 280
  • Replacement crush washer (optional but recommended to prevent leaks)
  • Gloves and safety glasses (optional for cleanliness)

Step-by-Step Oil Change Instructions

  1. Warm Up the Engine
    Let the bike idle for a few minutes to bring the engine and gear oil to operating temperature. Warm oil drains more thoroughly and suspends contaminants for removal.
  2. Place the Bike on a Stand
    Secure the TXT PRO 280 upright using a motorcycle stand so the bike is stable and level. This ensures the oil drains completely.
  3. Clean the Area
    Wipe off any dirt or debris from around the drain plug and oil fill cap. This prevents contaminants from getting into your engine during the oil change.
  4. Remove the Drain Plug
    Use the correct socket or spanner to loosen and remove the oil drain plug located at the bottom of the right side of the engine case. Make sure your drain pan is positioned to catch all the old oil.
    Be careful: The plug and any washer may be hot from the engine.
  5. Drain the Oil
    Allow the old oil to fully drain—this may take a few minutes. Tip the bike slightly (if necessary) to ensure all oil is removed.
    Inspect the drained oil for metallic particles or unusual coloration, which can indicate internal wear.
  6. Replace the Crush Washer (if equipped)
    Install a new crush washer on the drain bolt if the old one is deformed or excessively worn. This prevents future leaks.
  7. Reinstall the Drain Plug
    Wipe excess oil from the threads and reinstall the drain plug by hand to avoid cross-threading, then snug it with a socket or torque wrench.
    Do not overtighten. The drain bolt threads are relatively soft, and overtightening can cause stripping. A good practice is to torque to manufacturer specification (usually 10-15 Nm; check your owner's manual if uncertain).
  8. Refill with Fresh Oil
    Remove the oil fill plug on the right side cover. With a clean funnel, pour in 370 ml of the recommended gear oil. GAS GAS commonly recommends specialist gear oil such as NILS Clutch Trial, but many riders use high-quality synthetic or semi-synthetic transmission oil suitable for wet clutches.
    Pour carefully to the correct level. Overfilling can harm clutch performance; underfilling can cause premature wear.
  9. Install the Oil Fill Plug
    Replace the fill plug, ensuring it is seated evenly and tightened snugly (but again, not too tight for these soft threads).
  10. Check for Leaks
    Wipe around the drain and fill plugs, then start the engine and let it idle for a minute. Shut off and check for any leaks at both plugs. If any are found, correct as necessary.
  11. Dispose of Old Oil Properly
    Take the used oil to a local recycling center or auto parts store. Never dispose of motor oil in the trash, drains, or outdoors.

Model-Specific Notes — 2014 GAS GAS TXT PRO 280

  • The TXT PRO 280 uses a hydraulic clutch. Using the correct oil viscosity helps maintain optimal clutch feel and longevity.
  • The transmission uses approximately 370 ml of gear oil; overfilling can cause oil to seep out of the breather or affect clutch operation, while underfilling risks gear damage.
  • Drain plug threads are soft aluminum — always use a torque wrench when reinstalling the plug to avoid stripping the threads.
  • Owners report that specialist gear oils such as GRO or NILS Clutch Trial improve shifting and clutch performance on these bikes.
  • If you ride in extreme conditions (mud, heavy load), inspect oil for water ingress or excessive contamination and change more often than manufacturer recommendation.

Final Recommendation

Regular oil changes keep your GAS GAS TXT PRO 280 running at peak performance. MotoSport.com recommends establishing an oil change interval based on your riding intensity and conditions—typically every 15-20 hours for trials machines. Always use high-quality oil and proper tools for the best results and long engine life.

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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.