How to Change the Oil in a 2023 GAS GAS EC 250

Shop parts for a 2023 GAS GAS EC 250 Dirt Bike.

Regular oil changes are essential for keeping your 2023 GAS GAS EC 250 running smoothly and ensuring a long engine life. This robust guide exclusive to MotoSport.com provides step-by-step instructions, highlights all required tools, and details specific call-outs every EC 250 owner should know before performing this routine maintenance.

Tools and Supplies Needed

  • Appropriate engine oil for 2-stroke motorcycles (refer to your owner's manual for specification and quantity)
  • New oil filter (if equipped)
  • Drain pan to catch old oil
  • 8mm Allen wrench or T-wrench
  • 13mm ratchet or socket (for drain plug)
  • Clean rags
  • New crush washer (recommended to replace with every oil change)
  • Torque wrench for accurate re-installation
  • Needle-nose pliers (helpful for oil screen removal and cleaning)
  • Oil pan and funnel
  • Bike stand that does NOT block the drain plug access (avoid using a traditional stand that covers the oil drain plug)

Preparation and Model-Specific Call-Outs

  • Stand Placement:– Use a stand that allows full access to the drain plug. Many traditional stands will block the plug and make draining difficult. Leaning the bike slightly can help the oil drain completely and prevent old oil from remaining inside the engine

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  • Engine Temperature:– For best results, run the engine for a few minutes to warm the oil before draining. Warm oil flows easier and removes more contaminants.
  • Owner's Manual:– Always refer to the 2023 GAS GAS EC 250 owner's manual for confirmed oil type and quantity. As a 2-stroke, this model's transmission oil is separate from the pre-mix(If you run oil-injected, check the oil level and refill as needed).

  • Special Notes for 2023 EC 250:– The EC 250 is a 2-stroke engine—change the transmission/gearbox oil, not engine oil like on a 4-stroke. Oil screens and filters may differ from prior or 4-stroke models, so consult the proper manual section for your bike

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Step-by-Step: Oil Change Procedure

  1. Get the Bike Ready
    • Place your EC 250 securely on a stand that gives you unblocked access to the underside of the engine. Having the bike level or slightly leaned will improve drainage.
    • Warm up the engine for 3–5 minutes, then turn it off and let it cool for a minute.
  2. Locate the Drain Plug
    • The drain bolt is located on the bottom left or right of the engine casing. Clean the area around it to prevent dirt from falling inside.
  3. Drain the Old Oil
    • Position the drain pan underneath the plug.
    • Using the correct size wrench (typically 13mm or 8mm Allen, check your manual), slowly remove the drain bolt and let the oil drain completely.
    • If your model has an oil screen, remove and clean it with fresh solvent or brake cleaner. Inspect for any metal debris—metal shavings may indicate internal wear

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    • Replace the crush washer on the drain bolt for a secure, leak-free seal.
  4. Remove and Replace Oil Filter (if equipped)
    • The 2023 EC 250 (2-stroke) may only have an oil screen, not a traditional cartridge oil filter. If your configuration includes a replaceable filter, remove the filter cover (using 8mm Allen) and replace the old filter with a new one. Inspect the O-ring and replace if damaged.

    • Clean sealing surfaces carefully.
  5. Check and Clean Components
    • Check and clean the sealing surfaces for both the drain plug and filter cover. Look over the O-rings for any flattening or damage and replace if needed.

    • Clean and reinstall the oil screen. Lubricate the O-rings with a drop of fresh oil before refitting.
  6. Re-install Drain Plug
    • Screw the drain plug back into place by hand to avoid cross-threading.
    • Tighten the plug with a torque wrench to the manufacturer's specified value (commonly 14.8 ft-lb/20 Nm, but verify with your owner's manual).
  7. Add New Oil
    • Remove the oil fill cap (usually located on the side of the engine case).
    • Place a funnel and pour in the correct type and amount of oil specified in your owner's manual.
    • Reinstall the fill cap.
  8. Final Checks
    • Start the engine and let it idle for 1–2 minutes. Stop the engine and wait about 30 seconds.
    • Check the oil level through the sight glass or dipstick. Top up if necessary.
    • Look underneath and around the engine for oil leaks. Tighten bolts further if seepage occurs, but do not overtighten.
  9. Dispose of Old Oil Safely
    • Transfer the used oil to a sealed container and dispose of it following your local environmental regulations.

Specific Model Call-Outs: 2023 GAS GAS EC 250

  • As a 2-stroke, the oil change focuses on the gearbox/transmission, not engine oil. Ensure you use transmission oil recommended by GAS GAS for the EC 250.
  • Pay extra attention to oil screens and any signs of metal. Clean the screen every oil change to prolong engine life and prevent failures.

  • Do not attempt to overfill–excess oil can create pressure and leaks.
  • Always use a new crush washer for the drain plug, as reusing an old one can result in leaks.
  • Wash and inspect the area around the drain plug, oil fill, and oil screen for signs of leaks after your first ride post-change.

Conclusion

Changing the gearbox oil on your 2023 GAS GAS EC 250 is routine but vital maintenance. With the proper tools, attention to detail, and model-specific know-how, you'll enjoy longer clutch life, better shifting, and peace of mind. For more tips, guides, and best-in-class parts, gear up with MotoSport.com—the destination for riders who demand the best.

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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.