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

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

MotoSport.com brings you this step-by-step proprietary guide for performing an oil change on your 2023 GAS GAS EX 250. Regular oil changes are essential for the long-term health and performance of your dirt bike. Below, find the required tools, detailed steps, and important model-specific notes for owners.

Tools & Supplies Needed

  • 13mm socket and/or wrench (for drain bolt)
  • T30 Torx bit (socket style works best for oil filter cover bolts)
  • 8mm T-wrench (for certain body panels or filter covers)
  • Drain pan
  • Oil change kit (includes correct oil and oil filter for the EX 250)
  • Paper funnel or similar for clean refilling
  • Contact cleaner (quick-drying, no residue)
  • Clean rag
  • A pair of pliers (optional, to remove stuck oil filter)
  • Measuring cup (for confirming oil capacity)
  • Replacement crush washer or sealing washer (strongly recommended)

Preparation & Model-Specific Callouts

  • Warm up the engine for 2–3 minutes to allow the oil to flow out easily.
  • Stand Selection: Do not use a flat stand. Use an open-style stand or lean the bike on the side stand to access the drain bolt and ensure full drainage of oil. This is crucial for the 2023 EX 250 due to the drain bolt location

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  • Consult your owner’s manual for oil quantity—GAS GAS recommends confirming your exact capacity and torque settings for the EX 250, as small errors can affect performance

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  • Be aware of the magnetic drain bolt; inspect it for metallic debris as it can indicate engine wear

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Step-by-Step Oil Change Instructions

  1. Remove Skid Plate (If Equipped):
    • You may need to remove the skid plate to access the drain bolt and oil filter cover.
  2. Position the Bike:
    • Place the bike on an appropriate stand that allows access to the drain bolt, or carefully lean it on its side stand

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  3. Remove the Drain Bolt:
    • Place a drain pan under the engine.
    • Locate the 13mm drain bolt underneath the engine and loosen it using a 13mm wrench or socket.
    • Remove the bolt and allow the oil to drain completely.
    • Check the bolt; GAS GAS uses a magnetic drain plug—wipe off any metal shavings. Replace the sealing washer if damaged

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  4. Remove the Oil Filter:
    • On the EX 250, locate the oil filter cover, usually held by T30 Torx bolts or 8mm bolts depending on setup

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    • Remove the bolts and gently pull out the oil filter. If stuck, use pliers carefully to avoid damaging the housing

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    • Inspect for excessive metal debris on the filter, which may signal engine issues.
  5. Clean All Surfaces:
    • Use a clean rag and contact cleaner on the mounting surfaces of the drain plug and oil filter cover

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    • Ensure no dirt enters the engine during reassembly.
  6. Install New Oil Filter:
    • Lubricate the O-rings on the new filter with fresh oil.
    • Insert the filter in the correct orientation—refer to your manual or the OEM filter shape.
    • Reinstall the oil filter cover and torque the bolts to specification (typically between 8–10 Nm for cover bolts).
  7. Reinstall the Drain Bolt:
    • Install a new crush washer if possible.
    • Reinstall and tighten the drain bolt to the factory torque specification (usually about 15–20 Nm, but confirm in your owner's manual)

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  8. Refill with Oil:
    • Using a funnel, fill the engine with fresh oil to the recommended amount for your 2023 EX 250. This is typically around 1.0 L (check manual), but always consult the specific manual for confirmation

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    • Ensure no spillage on hot engine parts.
  9. Check Oil Level:
    • Reinstall the oil fill cap.
    • Start the engine and let it idle for 1–2 minutes.
    • Shut off, wait a minute, then check the oil level using the sight glass or dipstick (per EX 250 specification). Top off as needed.
  10. Final Steps:
    • Wipe off any oil residue, recheck all fasteners, and reinstall the skid plate if you removed it.
    • Properly dispose of the used oil and filter at a certified recycling center.

Model-Specific Notes for the 2023 GAS GAS EX 250

  • The 2023 EX 250 shares its engine architecture with KTM and Husqvarna 250F models; oil change steps and tools are the same between brands

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  • Always use a stand that allows clear access to the drain bolt—some standard stands block access on this frame design

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  • Inspect the magnetic drain plug and the filter at every change. Any unusual debris can indicate issues inside the engine—address promptly if found

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  • Do not over-torque bolts; soft alloy engine cases can strip easily.
  • Stick with high-quality oils and OEM or premium aftermarket filters for best results and warranty protection.

Oil Change Frequency

  • Change your oil every 10–15 hours of riding for optimal engine life, or sooner if riding in extreme conditions

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Changing the oil in your 2023 GAS GAS EX 250 is a quick job that delivers critical protection for your investment. With the right tools and a bit of care, you'll keep your engine running at peak performance for many rides to come.

For OEM and aftermarket oil filters, drain plugs, and complete oil change kits, trust MotoSport.com—your comprehensive source for dirt bike maintenance parts.

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Shop Oil Fillers and Drain Plugs for a 2023 GAS GAS EX 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.