How to Change the Oil in a 2018 GAS GAS TXT GP 280

Shop parts for a 2018 GAS GAS TXT GP 280 Dirt Bike.

Changing the oil in your 2018 GAS GAS TXT GP 280 is a crucial part of regular maintenance and extends the life and performance of your dirt bike. This step-by-step guide, written specifically for MotoSport.com, will walk you through the process while highlighting model-specific details, recommended products, and essential tips so your bike runs smoothly in every condition.

Tools & Supplies Needed

  • Oil drain pan
  • 13mm or 14mm box-end wrench or socket (confirm for your specific drain bolt)
  • Funnel
  • Rags or shop towels
  • Torque wrench (optional but recommended)
  • New crush washer for drain bolt (recommended but optional)
  • 370cc high-quality gearbox oil (NILS Clutch Trial, GRO Gear Oil, or MASOIL-approved oil; see owner's manual for exact spec)
  • Gloves (optional but recommended)

Preparing for the Oil Change

  • Start your engine and let it run for about 2–3 minutes to slightly warm the oil. Warm oil flows better and helps remove more contaminants.
  • Stop the engine and secure the bike on a stable, upright stand.
  • Ensure the surrounding area, especially near the drain bolt and fill cap, is clean to prevent debris from contaminating the gearbox.

Step-By-Step Oil Change Procedure

  1. Locate the drain bolt
    • On the 2018 GAS GAS TXT GP 280, the drain bolt is located on the underside of the engine case, typically near the right side.
  2. Place the drain pan under the drain bolt.
  3. Remove the drain bolt.
    • Use your box-end wrench or socket to carefully loosen and remove the bolt. If equipped, remove the crush washer and set it aside for replacement.
    • Let the oil drain completely. This may take several minutes, especially if the oil is cool.
    • Check the used oil for any excessive metal filings or foreign objects which could indicate abnormal wear.
  4. Clean and reinstall the drain bolt.
    • Wipe the drain bolt and surrounding area clean with a rag.
    • Install a new crush washer, if you have one.
    • Hand-thread the bolt back in, then snug it with the wrench. Do not overtighten. Overtightening can strip the threads in the soft aluminum case. If you have a torque wrench, refer to your owner's manual for the correct torque spec (typically around 10–14 Nm).
  5. Remove the oil fill cap.
    • Located on the right engine cover, often marked with an oil symbol.
  6. Pour in new oil.
    • Using a funnel, add 370cc of the recommended gearbox oil (NILS Clutch Trial, GRO, or AMSOIL equivalent for the GP 280)

      .
    • Pour slowly to avoid overfilling, and give the oil a moment to settle before checking the level.
  7. Reinstall the oil fill cap.
    • Ensure the area is clean and the cap threads on smoothly.
  8. Start and idle the motorcycle for a minute.
    • This allows oil to circulate. Shut off the engine and wait a few minutes, then check for leaks at the drain bolt and fill cap.
  9. Inspect your oil level one final time and top off if necessary.
    • Do not overfill—excess oil can cause clutch and gearbox issues.

2018 GAS GAS TXT GP 280 Model-Specific Call-Outs

  • Oil Capacity: 370cc of transmission/gear oil–not engine oil–which also lubricates the clutch.

  • Recommended Oil: The manufacturer recommends NILS Clutch Trial or a high-quality competition trial gearbox oil. AMSOIL synthetic or GRO are also acceptable.

  • Drain Bolt Torque: Avoid overtightening to protect the aluminum threads. Use a torque wrench set to specification if possible.
  • Oil Inspection: Between changes, check oil levels regularly since gear oil breakdown or loss can cause premature clutch wear.
  • Frequent Riding: If you ride in dusty or muddy conditions, check and change the oil more frequently for optimum clutch and gear protection.

Tips for Success

  • Keep everything clean: Dirt in your gearbox can quickly cause excessive wear.
  • Always use the correct oil and volume: Other oils or over/underfilling can damage the clutch or shifting performance.
  • Safely dispose of used oil at a recycling center.
  • Monitor the clutch feel: Unusual engagement could signal a need for a different oil or internal inspection.

Final Thoughts

Changing your GAS GAS TXT GP 280 oil is a simple job that pays off in smoother performance, better clutch feel, and increased longevity for your gearbox and engine. Always choose top-quality oils and don’t rush the process. If you need factory-recommended oils or tools, MotoSport.com stocks a full selection tailored for your bike.

Related Shopping Categories

Shop Motor Oil for a 2018 GAS GAS TXT GP 280 Dirt Bike.

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Shop Oil Drain Pans for a 2018 GAS GAS TXT GP 280 Dirt Bike.

Shop Tools for a 2018 GAS GAS TXT GP 280 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2018 GAS GAS TXT GP 280 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.