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

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

An oil change is one of the most important maintenance tasks for your 2025 GAS GAS EC 250. Regular oil changes keep your engine running smoothly and prevent premature wear. Follow this step-by-step guide, proprietary to MotoSport.com, to ensure a clean, effective oil change.

Tools and Supplies Needed

  • 13mm socket or wrench – for the drain bolt
  • T30 Torx bit (or Torx socket) – for various engine covers depending on your bike's equip
  • 8mm Allen wrench/T-wrench – for oil filter cover bolts
  • Oil drain pan – to catch old oil
  • Clean rags
  • Contact cleaner (quick-dry, leaves no residue)
  • Replacement engine oil (refer to your owner's manual for specific viscosity/type and capacity)
  • New oil filter (preferably OEM or high-quality aftermarket)
  • Replacement crush washer for the drain bolt (recommended)
  • Needle nose pliers – helpful for removing oil screens
  • Torque wrench (optional but recommended for drain bolt)
  • Stand – use a side stand or a stand that allows access to the drain bolt; avoid center stands that block it

Step-by-Step Oil Change Instructions

  1. Warm Up the Engine:
    • Start your bike and let it idle for a few minutes. This heats the oil so it drains quickly and carries out more contaminants.
    • Turn off the engine and ensure the bike is stable on its stand.
  2. Position the Drain Pan and Remove Drain Bolt:
    • Slide your oil pan under the engine, directly below the drain bolt.
    • Using the 13mm socket or wrench, loosen the drain bolt (located at the bottom of the engine). Finish removing it by hand.
    • Allow all the oil to drain into the pan. This can take several minutes.
  3. Inspect Drain Bolt and Clean:
    • Many GAS GAS drain bolts have a magnetic tip designed to collect metal shavings. Wipe any debris off with a rag.
    • Replace the crush washer if worn or damaged.
  4. Remove and Replace Oil Filter:
    • Locate the oil filter cover (usually on the side of the engine).
    • Use your 8mm Allen wrench/T-wrench to remove the cover bolts. Set aside carefully.
    • Gently wiggle out the old oil filter. If stuck, use a pair of needle nose pliers. Inspect for metal particles in the old filter.
    • Install the new filter, matching direction per your owner's manual. Lightly oil the O-ring/gasket for a better seal.
    • Reinstall the oil filter cover and tighten the bolts evenly. Do not overtighten.
  5. Check and Clean Oil Screens (if equipped):
    • Remove oil screens as outlined in your manual. Spray with contact cleaner and inspect for debris or shavings.
    • Replace if screen or O-rings are damaged.
    • Carefully reinstall the oil screen, ensuring correct alignment with O-rings lightly oiled for sealing.
  6. Reinstall the Drain Bolt:
    • Install the drain bolt with a new crush washer and tighten by hand, then torque to specification (approx. 14.8 ft-lb is typical for similar models).
  7. Add Fresh Oil:
    • Remove the oil fill cap.
    • Pour in manufacturer-recommended oil up to the specified level (check manual).
    • Replace and tighten the oil fill cap.
  8. Check for Leaks and Oil Level:
    • Start the engine and let it idle for 1–2 minutes, then turn it off and wait a minute for oil to settle.
    • Inspect around the drain bolt and filter for any oil leaks.
    • Check the oil level with the dipstick or sight glass. Add oil if needed, but do not overfill.
  9. Dispose of Old Oil Properly:
    • Pour used oil into a sealed container and take it to an appropriate recycling center.

2025 GAS GAS EC 250 Model-Specific Tips & Call-Outs

  • The drain bolt can be difficult to access with certain types of bike stands. Use a stand that leaves the area beneath the engine unobstructed for easy access.
  • The drain bolt is equipped with a magnet for collecting metal particles; always inspect for debris but some residue is normal. Significant or large metal shards may indicate internal wear and should be investigated.
  • When cleaning oil screens, careful alignment is crucial. A misaligned screen can allow debris into the oil pump and cause engine damage. Feel for the correct seating during reinstallation.
  • Always lubricate new O-rings lightly with clean oil to prevent pinching or leaks during reassembly.
  • Use only the recommended quantity and type of oil. Slight overfilling may cause oil to foam and reduce engine protection.

Final Thoughts

Taking care during each step ensures your 2025 GAS GAS EC 250 runs strong and lasts for years. Following the steps above and keeping an eye out for excessive debris can alert you to early signs of internal wear. Always use quality parts and oil, and enjoy safe, consistent performance on every ride. For all your GAS GAS maintenance needs, trust MotoSport.com for expert advice and OEM parts.

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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.