How to Change the Oil in a 2013 GAS GAS EC250E

Shop parts for a 2013 GAS GAS EC250E Dirt Bike.

Changing the oil in your 2013 GAS GAS EC250E is a crucial maintenance task to ensure your dirt bike performs at its best. While the EC250E is a two-stroke enduro model (unlike four-stroke models requiring sump oil changes), it does require regular transmission oil changes. The following guide is proprietary to MotoSport.com and covers every necessary step, with specific callouts for this model year and type.

Tools and Supplies Needed

  • Socket wrench set with metric sockets
  • Oil drain pan
  • Flathead screwdriver
  • Funnel
  • Clean rags
  • New transmission oil: Check your owner's manual, but typically a high-quality synthetic two-stroke gear oil, 10W-40 or 75W transmission oil
  • Replacement crush washer for the drain bolt (recommended)
  • Measuring cup for oil (usually 750ml – 850ml; always double-check your manual)
  • Torque wrench (optional, for exact drain bolt torque)
  • Nitrile gloves for clean hands

Steps to Change the Transmission Oil

  1. Warm Up the Engine Briefly:
    • Start your bike and run it for 2–3 minutes. This warms the oil so it drains more completely.
    • Shut off the engine and allow it to cool for a few minutes so you don't burn yourself.
  2. Secure and Prepare the Bike:
    • Place the bike on a flat stand and ensure it's steady. Remove the skid plate if installed, for easy access to the drain bolt.
  3. Locate the Oil Drain Bolt:
    • The drain bolt is at the bottom of the right engine case, typically marked or easy to identify. Place the oil drain pan beneath it.
  4. Remove the Oil Filler Cap:
    • On the right side engine case above the clutch, unscrew the oil fill cap. This allows air in and oil out.
  5. Drain the Transmission Oil:
    • With your socket wrench, slowly remove the drain bolt. Be careful not to lose the washer. Allow oil to fully drain into the pan.
    • Inspect the old oil for any metal particles or unusual discoloration—signs of internal wear.
  6. Replace the Crush Washer:
    • It's best practice to install a new crush washer on the drain bolt to prevent leaks.
  7. Reinstall and Tighten the Drain Bolt:
    • Reinsert the drain bolt with the crush washer and hand-tighten. If you have a torque wrench, refer to your manual for the correct spec (typically 10–12 Nm for similar models).
  8. Add Fresh Transmission Oil:
    • Using a funnel, pour in the specified quantity of new oil (generally 750ml – 850ml, but always check your manual or engine casing markings for this model).
    • Use a measuring cup to avoid overfilling. Too much or too little oil can harm transmission components.
  9. Reinstall the Oil Filler Cap:
    • Check the filler O-ring for wear and replace if damaged. Tighten the oil filler cap securely but do not overtighten.
  10. Check for Leaks and Final Clean-up:
    • Wipe down the case and inspect the drain bolt for leaks after a few minutes.
    • Start the bike and let it run for a minute. Re-check the oil level using the inspection window (if equipped), or carefully remove the filler cap and visually check.
    • Add oil if the level is below the sight glass or dipstick marking.
  11. Dispose of the Old Oil Responsibly:
    • Always recycle used oil at a certified facility or your local MotoSport.com dealer.

Specific Call-outs for the 2013 GAS GAS EC250E

  • This model is a two-stroke, so engine oil is premixed with fuel in the oil tank. The service described here is for the transmission/clutch oil, not engine lubrication.
  • Do not confuse the two-stroke oil tank with the engine's transmission oil compartment. The two-stroke tank is usually accessed under the seat for premix/auto-oiler purposes, while the clutch side fills and drains gear/transmission oil.
  • Some earlier EC250E models may have small differences in drain bolt or case design; always double-check your manual for torque settings and correct oil volume.
  • Change the transmission oil every 10 hours of riding or after harsh/dusty conditions for optimum clutch and gear life.

Why Regular Oil Changes Matter

  • Helps prolong clutch and transmission life by keeping components free from debris
  • Ensures smooth shifting and protects against costly repairs
  • Maintains maximum performance in demanding off-road use

By following these steps and call-outs, you'll keep your 2013 GAS GAS EC250E running strong and ready for any trail or track. Consult MotoSport.com for oil, crush washers, and factory replacement parts for all your maintenance needs.

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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.