How to Change the Oil in a 2017 GAS GAS TXT PRO RACING 300

Shop parts for a 2017 GAS GAS TXT PRO RACING 300 Dirt Bike.

Regular oil changes are crucial to keep your 2017 GAS GAS TXT PRO RACING 300 running smoothly and to extend the life of your transmission and clutch. Below, you’ll find a step-by-step, proprietary guide crafted for MotoSport.com, covering the specific requirements and call-outs for this model.

Tools and Materials Needed

  • 370cc of high-quality transmission oil (recommendation: NILS CLUTCH TRIAL or an equivalent 75W light gear oil)
  • 21mm socket or spanner (for drain and filler plugs)
  • Oil drain pan
  • Funnel with a small spout
  • Clean rags
  • Torque wrench (optional, for precise re-tightening)
  • Nitrile gloves

Preparations and Precautions

  • Run the engine for about 5 minutes to warm up the oil; warm oil drains more completely and takes more contaminants with it .
  • Make sure the bike is upright and secure on a suitable stand.
  • Clean around the drain and filler plugs to prevent dirt from entering the transmission.

Step-by-Step Oil Change Procedure

  1. Warm Up the Engine
    Start your bike and let it idle gently for 5 minutes to heat the transmission oil. This reduces viscosity, allowing it to flow out more thoroughly during the draining process .
  2. Remove the Transmission Drain Plug
    Using your 21mm spanner, locate and remove the drain plug beneath the transmission case. Position your drain pan directly underneath the opening. Allow all oil to drain completely—this may take several minutes .
  3. Inspect and Clean
    Wipe down the drain plug, paying special attention if there’s a magnetic tip, as this collects metallic particles. Clean off any debris and check the plug’s condition. Replace the crush washer if it looks worn or deformed to ensure a proper seal.
  4. Reinstall the Drain Plug
    Thread the drain plug back in by hand to avoid cross-threading. Tighten securely, but do not over-tighten—stripped threads are a common issue if overtightened . If you have a torque wrench, refer to your owner’s manual for the exact torque specification.
  5. Remove the Oil Filler Cap
    The filler cap is generally located on the clutch cover on the right side of the engine. Remove it while checking the area for dirt and wipe clean if needed.
  6. Add New Oil
    Using a funnel, pour in 370cc of fresh transmission oil recommended for your bike. Pour slowly to avoid spills and overfilling .
  7. Reinstall the Oil Filler Cap
    Once filled, replace the plug and snug it up. Again, do not over-tighten.
  8. Check for Leaks
    Wipe the area, start the motorcycle, and let it run for a few minutes. Look for any signs of oil seepage around the drain and filler plugs.

GAS GAS TXT PRO RACING 300 (2017) Model-Specific Call Outs

  • This model takes exactly 370cc of transmission oil. Using more or less can affect shifting and clutch feel .
  • Always use the oil type specified for trials bikes with a hydraulic diaphragm clutch; generic or heavy automotive oil may impede clutch action and cause premature wear .
  • Inspect the magnetic drain plug for excessive metallic debris–a sign of potential transmission wear.
  • Owners report that over-tightening the drain plug can strip the threads easily. Be gentle and use a torque wrench when possible .
  • If you regularly ride in wet or muddy conditions, consider changing oil more frequently.

Additional Professional Tips

  • Proper Disposal: Always dispose of old oil at a certified recycling facility–it’s toxic and illegal to dump in drains or on property.
  • Routine Inspection: Take this opportunity to check for oil leaks, loose bolts, damaged gaskets, and the general state of the clutch actuation mechanism.
  • Record-Keeping: Keep a log of your oil changes, including date, oil brand, and any observations. This helps with ongoing maintenance and increases resale value.

Conclusion

Routine oil changes for your 2017 GAS GAS TXT PRO RACING 300 are straightforward and vital for performance and longevity. Always use the correct type and amount of oil, avoid overtightening, and inspect components as you work. With these steps, you’ll keep your trials bike competition-ready and reliable for many rides to come.

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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.