How to Change the Oil in a 2009 GAS GAS EC 250

Shop parts for a 2009 GAS GAS EC 250 Dirt Bike.

Routine oil changes are critical to keeping your 2009 GAS GAS EC 250 running strong and protecting your engine against premature wear. This detailed guide, brought to you by MotoSport.com, will walk you through the exact process, highlight any special considerations for your specific bike, and provide a curated tools checklist to make the job efficient and hassle-free.

Tools and Supplies You’ll Need

  • 13 mm socket (for the drain bolt)
  • 13 mm wrench or crescent wrench
  • T30 Torx bit (if equipped with Torx hardware)
  • Drain pan
  • Clean rags
  • Contact cleaner or brake cleaner (optional, for cleaning parts)
  • Replacement oil filter (if required, refer to your owner's manual)
  • OEM-recommended engine oil (see manual for proper specification and quantity)
  • New crush washer (recommended when changing oil)
  • Torque wrench (recommended)
  • Gloves (for cleanliness and safety)

Step-by-Step Oil Change Guide

  1. Warm Up the Engine

    Start the bike and let it idle for 3–5 minutes. This helps the oil flow easily and ensures contaminants are suspended for removal. Shut the engine off and secure the bike upright with a stand that doesn’t block the drain bolt, as some stands can obstruct access on this model.

  2. Prep Your Workspace

    Gather all tools and supplies. Place the drain pan underneath the engine’s drain bolt. Lay down rags or absorbent pads if working indoors.

  3. Remove the Drain Bolt

    Using the 13mm socket or wrench, carefully loosen the drain plug located on the bottom of the crankcase. Spin it off by hand, being careful as hot oil will flow out rapidly. Allow all oil to drain into the pan. Inspect the plug for a magnet—this is normal on the EC 250 and designed to attract stray metal particles. Wipe away any debris from the magnet before reinstalling.

  4. Replace or Clean the Oil Filter (if equipped)

    Some two-stroke models, including the 2009 EC 250, may use a reusable oil screen instead of a traditional filter. If equipped:

    • Remove the oil screen cap or filter cover using the appropriate tool (often an 8mm or T30 Torx bit).
    • Carefully extract the screen or filter, clean with contact cleaner, and inspect for metal debris.
    • Check all O-rings for flattening or damage—replace as needed.
    • If your bike has a paper oil filter (less common on two-strokes), replace it with a new, OEM-spec filter and lubricate the rubber seal before installation.

    Reinstall the cleaned screen or new filter, ensuring it seats properly.

  5. Inspect and Replace the Crush Washer

    Always replace the crush washer on the drain plug to ensure a reliable seal. This is a cheap part that prevents leaks.

  6. Reinstall the Drain Plug

    Thread the drain plug back in by hand to avoid cross-threading. Once snug, use a torque wrench to tighten it to the manufacturer’s specification (typically around 14–15 ft-lbs, but always check your manual).

  7. Add New Oil

    Remove the filler cap and use a funnel to pour in the recommended quantity and grade of oil (check the owner’s manual–it's typically around 750–800 ml for this engine). Do not overfill.

  8. Check for Leaks

    With the oil added, wipe off any spilled oil and start the engine. Let it idle for 1–2 minutes, then turn it off and inspect around the drain bolt and oil screen cover for leaks.

  9. Check Oil Level

    With the bike upright, check the oil level according to the sight glass or dipstick, as specified in your manual. Add oil if needed to bring it to the proper mark.

  10. Clean Up and Dispose of Old Oil

    Wipe down any oily surfaces, clean your tools, and properly dispose of the old oil and filter at a recycling center or auto parts store. Many locations offer free disposal.

Model-Specific Tips and Call-Outs for the 2009 GAS GAS EC 250

  • Drain Bolt Location: The drain plug is typically positioned on the bottom center of the engine case; ensure you use the correct stand for full access. Certain bike stands may block the drain bolt—use a lift stand or rear stand for best results.
  • Magnetic Drain Plug: Inspect for and clean off metal shavings from the drain bolt each time, as this helps diagnose early signs of engine wear.
  • Oil Capacity: Always check your owner’s manual for the correct oil quantity. Overfilling can cause crankcase pressure problems and leaks.
  • Screen, Not Filter: Many 2009 EC 250 models use a reusable screen rather than a paper filter. Clean thoroughly with contact cleaner and be sure to reinstall in the correct orientation.
  • Crush Washer: Always use a new crush washer to guarantee a tight seal on the drain bolt and avoid leaks.
  • Oil Type: Only use oil specifically designed for 2-stroke gearboxes for optimal clutch and transmission life.

Final Notes from MotoSport.com

An oil change on your 2009 GAS GAS EC 250 is an easy piece of preventive maintenance that goes a long way in maximizing performance and engine lifespan. Always refer to your owner’s or service manual for model-specific details, and use quality oil and parts to keep your machine at its best. For fast delivery of OEM and aftermarket parts, and all your maintenance needs, MotoSport.com has you covered.

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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.