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

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

Changing the oil in your 2023 GAS GAS EX 250F is a vital maintenance step to ensure optimal performance and engine longevity. This comprehensive MotoSport.com guide explains everything you need—tools, steps, and important model-specific tips—to help you perform a confident and clean oil change.

Tools and Supplies Needed

  • 13mm socket or wrench
  • 8mm Allen wrench or T-handle (for oil filter cover)
  • T30 Torx bit (some models may require this for panels/guards)
  • Oil change kit (includes 1.0 liter Motorex Cross Power 4T 10W/50 full synthetic oil, OEM oil filter, and crush washer; available for 2021–2024 models)
  • Drain pan (capable of holding at least 1 liter)
  • Clean rags (for wiping spills and cleaning parts)
  • Contact cleaner (safe for engine and fast-drying)
  • Torque wrench (recommended for proper bolt tension)
  • Pliers (if the oil filter is difficult to remove)

Tip: Always check the GAS GAS owner’s manual for updated specs, as oil and filter details may change with each model year.

Step-by-Step Oil Change Instructions

  • Warm up the engine
    Briefly start and run the engine for 2-3 minutes. Warm oil drains more quickly and carries away more contaminants.
  • Stabilize the bike on a suitable stand
    Use a stand that allows unobstructed access to the drain bolt beneath the engine. Avoid stands that block the drainage area; a lift stand or side stand is recommended for the EX 250F.
    Model call-out: The 2023 EX 250F has a uniquely placed drain bolt; some stands may block access and should be avoided.
  • Prepare your work area
    Place the drain pan under the drain bolt. Make sure all your tools are within reach.
  • Remove the drain bolt
    Using your 13mm socket or wrench, loosen and remove the main oil drain bolt beneath the engine. Let the oil fully drain into the pan.
    Inspect the magnetic tip of the drain bolt for metal shavings. The presence of small metallic particles is normal, but excessive or large shavings may indicate internal engine issues. Use a clean rag to wipe the bolt.
    Note: Always replace the crush washer with a new one to prevent leaks.
  • Remove the oil filter
    Use your 8mm Allen wrench or T-handle to remove the two bolts from the oil filter cover (usually located on the right crankcase). Tap lightly if the cover sticks.
    Remove the old oil filter. If it’s stuck, use pliers to carefully extract it.
    Be cautious of residual oil when removing the filter and cover—have your pan ready.
  • Clean and inspect
    Wipe the area around the oil filter and drain bolt with a clean rag. Use contact cleaner to remove any oil residue, keeping components and surfaces clean for reassembly and inspection.
  • Install new oil filter
    Lubricate the O-ring (if applicable) on the new filter with a little fresh oil. Install the new filter and replace the cover, tightening the bolts securely.
  • Reinstall the drain bolt
    Fit a new crush washer onto the drain bolt. Reinstall and snug it to the recommended torque. Check your service manual for the proper specification; overtightening can strip threads or damage the case.
  • Add new oil
    Remove the oil fill cap (usually on top/right side of the engine). Using a clean funnel, pour in 1.0 liter of Motorex Cross Power 4T 10W/50 full synthetic oil, unless otherwise specified in your manual.
  • Check oil level
    Reinstall the fill cap. Start the engine, let it idle for a minute, then turn off and allow the oil to settle for 2-3 minutes. Use the dipstick or oil sight glass to ensure oil reaches the correct level. Top off if needed.
  • Inspect for leaks
    Carefully inspect the drain bolt, filter cover, and fill cap for leaks. Wipe away any excess oil.
  • Dispose of used oil and filter responsibly
    Take used oil and filters to your local recycling or hazardous waste collection site.

Model-Specific Tips and Call-Outs

  • Drain Bolt Location: The 2023 GAS GAS EX 250F drain bolt is positioned for quick access, but certain traditional or cradle stands can block access to the bolt. Always use a bike stand that keeps the bolt area clear.
  • Oil Volume: The required oil volume is 1.0 liter (use high-quality, full synthetic 10W/50 oil as provided in most oil change kits).
  • Crush Washer: Always replace the crush washer to avoid leaks.
  • Magnetic Bolt Inspection: Routine inspection of the magnetic drain plug is important. Finding very fine “glitter” is normal, but excess shards mean it’s time to investigate further.
  • Extended Change Intervals: The EX 250F manual often recommends changing the oil every 10–15 hours for racing, and every 15–20 hours for recreational riders. Adjust frequency as needed depending on your riding intensity.

Final Notes

  • Avoid over-tightening any bolts. Always refer to your owner’s manual for the latest torque specs. All oil and filter details here align with the 2023 EX 250F, but always check for specific year-to-year changes.
  • Performing regular oil changes on your GAS GAS EX 250F will keep your engine in top shape and ready for any challenge. A little care now prevents frustration–and costly repairs–later on.

MotoSport.com—Keeping you and your ride dialed in.

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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.