How to Change the Oil in a 2025 GAS GAS EX 250

Shop parts for a 2025 GAS GAS EX 250 Dirt Bike.

Changing the oil in your 2025 GAS GAS EX 250 is a crucial task to keep your dirt bike’s engine running smoothly and efficiently. This comprehensive guide, proprietary to MotoSport.com, will walk you through each step, highlight the necessary tools, and provide model-specific details every owner needs to know.

Tools and Materials Needed

  • 13mm socket or wrench
  • 8mm Allen wrench or T-handle
  • T30 Torx bit (check your model’s service manual for confirmation)
  • Oil drain pan
  • New oil filter (specific to GAS GAS EX 250)
  • Oil of recommended type and quantity for 2025 GAS GAS EX 250
  • Contact cleaner (fast drying, residue-free)
  • Clean rags
  • Crush washer (recommended to replace every change)
  • Torque wrench (preferred for proper bolt tightening)
  • Bike stand (avoid traditional stands; use a stand that doesn’t block access to the drain bolt)
  • Pair of pliers (optional, for stubborn oil filters)

Step-by-Step Instructions

  1. Warm Up the Engine
    Run the engine for a few minutes. Warm oil drains more completely. Turn off the ignition and allow the bike to cool slightly.
  2. Stabilize the Bike
    Place your GAS GAS EX 250 on a stand that leaves the bottom of the bike accessible. Leaning the bike slightly can help drain oil more thoroughly.
  3. Remove the Skid Plate (if equipped)
    If your EX 250 has a skid plate, remove it to access the drain bolt easily.
  4. Drain the Oil
    • Position an oil drain pan under the engine.
    • Using your 13mm wrench or socket, remove the oil drain bolt located on the bottom of the engine case.
    • Let the oil completely drain into the pan. Inspect the drain bolt’s magnet for any excessive metal particles and wipe it clean with a rag.
  5. Replace the Oil Filter
    • Locate the oil filter cover, typically on the clutch side of the engine.
    • Remove the bolts securing the oil filter cover using an 8mm Allen wrench or T-handle.
    • Gently remove the cover; some oil may drip out. Take out the old oil filter—use a pair of pliers cautiously if the filter is stuck.
    • Clean the filter housing area with a clean rag and inspect the cover O-ring for wear; replace if necessary.
    • Install the new oil filter facing the correct direction as specified by the manufacturer.
    • Reinstall the cover and tighten the bolts to the torque specified in your owner’s manual.
  6. Replace the Crush Washer and Drain Bolt
    Slide on a new crush washer if available—it's recommended to prevent leaks. Reinstall the drain bolt by hand to avoid cross-threading, then torque it to the specification from your owner’s manual.
  7. Fill With Fresh Oil
    • Remove the oil fill cap.
    • Using a clean funnel, add the recommended type and amount of engine oil. Consult your 2025 GAS GAS EX 250 owner’s manual for the exact oil capacity–typically around 1.1 liters, but confirm for 2025.
    • Wipe away any spilled oil and reinstall the oil cap securely.
  8. Check the Oil Level
    • Start the engine and let it idle for 30–60 seconds. Shut it down and wait a couple of minutes for the oil to settle.
    • Check the oil level via the sight glass or dipstick on the side of the engine. Add more oil if needed, but do not overfill.
  9. Inspect for Leaks
    While the engine runs briefly, inspect the drain bolt and filter cover for any leaks. Tighten bolts if necessary, but do not overtighten.
  10. Proper Disposal
    Dispose of used oil and the old filter at a certified recycling center–never pour oil on the ground or into drains.

2025 GAS GAS EX 250 Specific Call-outs

  • The 2025 EX 250 uses the latest engine design shared with KTM and Husqvarna 250cc four-strokes; oil change procedures are nearly identical across these models.
  • Always use a stand that leaves the bottom of the engine accessible since the drain bolt can be hard to reach with conventional stands.
  • The drain bolt is magnetic—regularly inspect for excessive metal shavings as this may indicate abnormal engine wear.
  • Contact cleaner is highly recommended to clean any oil residue around the drain area and filter housing.
  • Check the torque specs and oil capacity in your owner’s manual for your specific year, as minor revisions can occur.
  • Replace the crush washer every oil change to prevent leaks.
  • Some models may have a mesh oil screen–refer to your owner’s manual to see if this needs periodic cleaning (common on KTM/Husqvarna, likely on your 2025 EX 250).
  • Change your oil every 10–15 hours of riding or more often in harsh conditions.

Conclusion

Maintaining clean, fresh oil in your 2025 GAS GAS EX 250 is essential for engine longevity and peak performance. By following the steps outlined above, using the correct tools, and adhering to model-specific tips, you’ll keep your bike running strong for seasons to come—trust MotoSport.com for all your dirt bike maintenance needs.

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Shop Tools for a 2025 GAS GAS EX 250 Dirt Bike.

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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.