How to Change the Oil in a 2019 GAS GAS TXT RACING 250

Shop parts for a 2019 GAS GAS TXT RACING 250 Dirt Bike.

Routine oil changes are crucial for maximizing the performance and longevity of your 2019 GAS GAS TXT RACING 250. Proper maintenance ensures the engine runs smoothly and minimizes wear. Below is a comprehensive, proprietary MotoSport.com step-by-step guide to changing your oil, including specific tools, products, and owner tips tailored to this model.

Tools & Supplies Needed

  • 8mm and 13mm wrenches or sockets (for drain and fill bolts – verify bolt size before starting; sometimes 17mm is used, check your manual to confirm)
  • Drain pan
  • Funnel
  • Clean rags
  • Measuring cup (for oil volume accuracy)
  • Fresh transmission oil, e.g., a high-quality 75W gear oil, capacity 0.42–0.48 quarts (approx. 400–450 ml)

  • Replacement crush washer for drain bolt (recommended to replace with each oil change)
  • Contact cleaner/degreaser (optional but recommended for cleaning around drain area)
  • Gloves (for hand protection)

Steps to Change the Oil

  1. Warm up the engine: Start the bike and let it idle for 2-3 minutes. Warm oil flows more easily and carries contaminants out with it. Turn the engine off and ensure the bike is stable (use a stand or secure area).
  2. Clean around the drain area: Wipe dirt from around the drain/fill plugs to prevent contamination when you remove them.
  3. Remove the drain plug: Use the appropriate wrench (typically 8mm, 13mm, or 17mm) to loosen and remove the oil drain plug below the engine. Place the pan to catch used oil. Allow all oil to drain out.
    • Look for the crush washer on the drain plug. Always inspect and replace if damaged; using an old or deformed washer risks leaks.
    • Be patient; let oil drip until empty. Avoid stripping the threads or over-tightening when reinstalling later

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  4. Check for contaminants: Inspect the oil for unusual metal shavings or debris, which could signal engine wear. Wipe the drain plug clean, especially if it—s magnetic.
  5. Reinstall the drain plug: Fit the new crush washer and hand-tighten the plug. Using your wrench, snug it down – not too tight. Over-tightening can strip threads in the soft aluminum case

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  6. Remove the fill plug: Usually located on the side of the crankcase. Remove it with the correct tool, using a rag to keep the area clean from dirt.
  7. Add new oil: Using a funnel, pour in the recommended 400–450 ml (0.42–0.48 qt) of new oil

    . Use a measuring cup for accuracy to avoid overfilling, which can damage seals or affect clutch performance.
    • Check oil type: Trials bike gearboxes often use a quality 75W gear oil. For heavy use or competition, some riders prefer specialist brands, but any high-quality specification oil for trials bikes is suitable

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  8. Check oil level: On the TXT models, verify the oil level using the inspection screw/bolt on the right crankcase (if fitted), or consult your manual for the proper check procedure. Oil should reach the bottom of the inspection hole but not overflow.
  9. Reinstall the fill plug: Tighten it by hand, then finish tightening with your wrench to the specified torque value. Again, avoid over-tightening.
  10. Wipe up and check for leaks: Start the engine and let it run for a minute. Check around the drain and fill plugs for any signs of oil leakage. If leaks are visible, shut off immediately and repeat plug installation steps.

2019 GAS GAS TXT RACING 250 Specific Tips & Call-Outs

  • Unlike many larger dirt bikes, the TXT model uses separate gear oil and does not have a traditional oil filter to replace during oil changes.
  • The transmission oil capacity is slightly less than half a quart; overfilling can cause clutch drag and poor performance, so be precise. When in doubt, err on the lower side and check the operation, then top up incrementally.
  • Always check the specific torque settings in your owner—s manual for drain/fill bolts to avoid thread damage.
  • Keep the bike level when measuring or refilling oil.
  • If you ride in especially wet, muddy, or high-load conditions, consider changing the oil more frequently than the standard service interval.
  • Before beginning, ensure you—re adding oil to the transmission and not the two-stroke engine—s separate two-stroke oil tank (if equipped).

Why Change the Oil Regularly?

  • Old or contaminated oil leads to clutch issues, gear wear, and poor shifting.
  • Fresh oil ensures smooth clutch engagement and reliable gearbox function, especially in trial-specific bikes like the TXT RACING 250.

Final Checks

  • Verify the oil level with the check bolt or inspection window (if fitted).
  • Confirm there are no leaks after warming the bike.
  • Check for smooth clutch and gear operation during your next ride.

Your 2019 GAS GAS TXT RACING 250 is ready for competition or play. For OEM parts, performance oils, and all your trials needs, trust MotoSport.com.

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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.