How to Change the Oil in a 2020 GASGAS EC 250

Shop parts for a 2020 GASGAS EC 250 Dirt Bike.

Changing the oil in your 2020 GASGAS EC 250 is essential maintenance for durability and peak performance, especially for off-road and enduro riding. This guide, proprietary to MotoSport.com, provides a step-by-step walkthrough tailored specifically to your EC 250 with important tips unique to this model.

Tools and Supplies Needed

  • 8mm T-wrench
  • 8mm Allen wrench (verify bolt shape for your model)
  • 13mm ratchet
  • Oil catch pan
  • New oil filter (OEM is strongly recommended)
  • Fresh engine oil (consult the owner's manual for correct viscosity and quantity)
  • New crush washer for drain plug
  • Rags or shop towels
  • Needle-nose pliers
  • Parts cleaner or brake cleaner spray
  • Torque wrench

Preparation Steps

  • Warm up the engine for 3–5 minutes. This thins the oil, helping it drain more completely.
  • Shut the engine off and position the bike on a center stand or an appropriate dirt bike stand. Note: Do not use a flat-top stand, which can block the drain bolt on this bike .
  • Place your oil catch pan directly beneath the drain bolt.

Step-by-Step Oil Change Procedure

  1. Remove the Oil Filler Cap
    • Locate the oil filler cap (typically on the right side of the engine) and remove it to allow better oil flow during draining.
  2. Remove the Drain Bolt
    • Using a 13mm ratchet, locate and loosen the engine oil drain bolt underneath the engine.
    • Allow the old oil to fully drain into your catch pan. This may take several minutes.
  3. Replace the Crush Washer
    • Remove and replace the old crush washer on the drain bolt to ensure a proper seal and prevent leaks .
  4. Clean the Drain Plug and Oil Screen
    • Clean the drain plug; check for any metal debris, which could indicate engine wear.
    • If your model has an oil screen (verify in service manual), remove and flush it with cleaner, inspecting closely for shavings .
  5. Reinstall and Torque Drain Bolt
    • Reinstall the drain bolt (and oil screen, if applicable).
    • Tighten with a torque wrench to manufacturer spec (typically around 14.8 ft-lbs, but always verify for your engine) .
  6. Change the Oil Filter
    • Locate the oil filter cover. Remove the two 8mm bolts with your T-wrench. Pull out the old filter, using pliers if necessary .
    • Clean the filter cavity and check O-rings; replace them if they're flattened or damaged for a proper seal .
    • Coat the new filter's O-rings with a bit of clean oil and install. Secure the cover, lightly tightening both bolts.
  7. Add New Engine Oil
    • Consult the owner's manual or sidecase markings for oil type and fill quantity.
    • Pour in the correct amount of fresh oil.
  8. Replace the Oil Filler Cap
    • Refit the cap and ensure it's secure.
  9. Start the Engine and Check for Leaks
    • Run the engine for 30–60 seconds. Shut it off and check around the drain bolt, oil screen, and filter for leaks.
    • Top off oil if needed after the engine sits for 2–3 minutes.
  10. Dispose of Old Oil and Filter Properly
    • Take used oil and filters to a certified recycling center, not down the drain or in regular trash. This protects the environment.

Important 2020 GASGAS EC 250 Specific Call-Outs

  • Stand Selection: The drain bolt location makes using a traditional dirt bike lift problematic. Use a center stand or one that doesn't obstruct access to the bottom of the engine .
  • Oil Quality: Always use high-quality 2-stroke-specific engine oil or the manufacturer's recommended blend for the EC 250. Slight differences in clutch feel and shifting can result from some viscosity changes.
  • Filter Installation: Make absolutely sure the oil filter O-rings are properly set and lubricated. Missing or pinched O-rings can cause catastrophic leaks .
  • Screen Inspection: Don't skip cleaning and inspecting the oil screen—leaving debris here risks engine wear.
  • Torque Specs: Confirm all torque specs in your owner's manual before final assembly to avoid damaging threads or causing oil leaks.

Final Tips

  • Clean your work area after the job to prevent dirt or grit entering the engine next time the cap is removed.
  • Keep a maintenance log noting oil brand, type, and date changed for reference.
  • Routinely inspect for oil leaks after riding, as vibration may loosen parts over time.

Performing an oil change as laid out above ensures your 2020 GASGAS EC 250 delivers years of reliable riding. For quality OEM parts and premium oil, shop exclusively with MotoSport.com.

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Shop Oil Fillers and Drain Plugs for a 2020 GASGAS EC 250 Dirt Bike.

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.