How to Change the Oil in a 2024 GAS GAS TXT GP 300

Shop parts for a 2024 GAS GAS TXT GP 300 Dirt Bike.

Changing the transmission oil in your 2024 GAS GAS TXT GP 300 is a crucial part of regular maintenance, ensuring smooth operation and a long life for your clutch and gearbox. This guide by MotoSport.com details every step, the necessary tools, and calls out unique attributes specific to the 2024 TXT GP 300. Always consult your owner’s manual for further guidance, but this robust how-to will ensure you perform the task safely and effectively.

Tools & Supplies You’ll Need

  • Metric wrench or socket set (check the size of your drain and fill bolts in the owner’s manual–typically 8mm, 10mm, or 13mm)
  • Measuring cup or graduated oil container (to ensure precise oil quantity)
  • Oil drain pan
  • Shop rags and paper towels
  • Funnel (small size, for easier access under the tank)
  • Rubber gloves
  • Replacement O-ring or washer (for drain bolt, if needed–inspect during job)
  • High-quality transmission oil (Capacity: 370cc / 0.37L; see the manual for recommended type, e.g., NILS Clutch Trial Oil)
  • Torque wrench (to properly torque the drain bolt)
  • Sturdy bike stand or paddock stand (to keep the bike upright and level)

Before You Begin: Model-Specific Callouts

  • Oil Capacity for 2024 GAS GAS TXT GP 300: 370cc (0.37L). Overfilling or underfilling can impact clutch performance and component longevity. Always measure oil volume precisely.
  • Recommended Oil: Reference the latest owner’s manual; the 2019 model specifies NILS CLUTCH TRIAL, and the 2024 should use a similar, trial-specific oil for best clutch feel and protection.
  • Drain & Fill Locations: On GAS GAS TXT GP 300 bikes, the transmission drain bolt is typically located on the bottom right side of the engine, and the filler bolt is near the clutch cover on the side. Always visually verify these locations before proceeding.
  • Check for Debris: The drain bolt is magnetic. When removing, inspect for small metal shavings–minor debris is normal, but large chunks signal internal problems and require further inspection.

Step-by-Step Oil Change Instructions

  1. Warm up the motorcycle for several minutes. This helps thin the oil so it drains completely. Idle gently and allow engine/transmission to warm but do not overheat.
  2. Place the bike on a secure, level stand. A paddock stand or sturdy bike stand will keep your GAS GAS upright and prevent accidents.
  3. Locate and remove the transmission drain bolt.
    • Position your oil drain pan underneath.
    • Loosen the drain bolt (likely a 13mm or 8mm bolt) using your socket or wrench.
    • Allow the oil to fully drain into the pan. This may take several minutes; tilt the bike slightly if necessary, but always keep it secure.
  4. Inspect the oil and drain bolt.
    • Look for excessive metal debris or odd coloration, which may signal a larger issue.
    • Clean the magnetic tip of the drain plug thoroughly. Replace the crush washer if it’s worn or damaged to ensure a good seal.
  5. Reinstall the drain bolt.
    • Tighten the bolt gently by hand, then use a torque wrench to torque it to the manufacturer’s specification (consult your manual—over-tightening can damage threads or case).
  6. Refill with new transmission oil.
    • Remove the fill bolt on the clutch cover or side of the engine.
    • Using a measuring cup and funnel, pour in exactly 370cc (0.37L) of the recommended oil.
    • Be careful not to overfill; pour slowly and monitor the volume.
  7. Reinstall the fill bolt securely. Wipe away any spilt oil.
  8. Cycle the transmission.
    • With the bike off, operate the kick starter a few times to help oil distribute through the system–this prevents a dry start.
  9. Run the engine briefly. Check for leaks around the drain and fill bolts.
  10. Check oil level. Although this model does not have a dipstick, check for correct oil level by noting the precise measured amount. If your bike has an inspection plug, confirm per manual instructions.

Maintenance Tips for the 2024 GAS GAS TXT GP 300

  • Change oil every 20 to 30 hours of riding or after particularly wet, dusty, or heavy use sessions for best protection.
  • Always use oil formulated for wet clutches, as incorrect oil can negatively affect clutch performance and lifespan.
  • Inspect the drain bolt’s O-ring or crush washer each service, replacing if flattened or damaged to avoid leaks.
  • Check the transmission for smooth shifting after each change; sticky changes can indicate oil type/level issues.

Specific Model Call-Outs for 2024 GAS GAS TXT GP 300

  • Oil capacity has not changed in recent TXT GP 300 models. Never assume a larger or smaller reservoir than manufacturer states.
  • Drain bolt torque: Use specified torque only; stripping case threads is a costly, common mistake.
  • Transmission oil window: Some earlier TXT models use an inspection bolt; the 2024 is best measured by volume poured in.

Regular oil changes are the foundation of reliable performance for your 2024 GAS GAS TXT GP 300. Follow these OEM-specific steps and use the right oil for best results every ride.

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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.