How to Change the Oil in a 2013 GAS GAS EC 300

Shop parts for a 2013 GAS GAS EC 300 Dirt Bike.

Changing the transmission oil on your 2013 GAS GAS EC 300 is an essential maintenance task that ensures smooth shifting, prolonged clutch life, and overall engine health. This guide from MotoSport.com walks you through the process step by step, highlighting tools you'll need, unique model quirks, and essential tips for getting the job done smoothly every time.

Tools and Materials Needed

  • 6mm Allen wrench (Socket style preferred for leverage)
  • Flush-fitting drain pan to catch old oil
  • Funnel with a narrow neck for refill
  • Measuring cup or graduated container (900cc capacity)
  • Clean paper towels or shop rags
  • Fresh 2-stroke transmission oil (see your owner's manual for recommended viscosity)
  • Torque wrench (optional, for reinstalling drain bolt to spec)
  • Brake cleaner (optional) for cleaning magnet on drain plug

Step-by-Step Process

  1. Preparation
    • Make sure the bike is completely cool and placed on a secure stand.
    • Warm up the engine with a short idle – this helps old oil flow faster.
  2. Remove the Skid Plate (if installed)
    • The EC 300—s drain plug is tucked under the skid plate. Remove the plate using the Allen wrench; typically there are a few bolts (check both sides and front).
    • If you have an aftermarket or factory bash/skid plate, ensure the access hole lines up with the drain bolt, or remove the plate completely for easier access.
  3. Locate and Remove the Drain Plug
    • The drain plug is located at the bottom of the engine.
    • Use your 6mm Allen wrench to carefully loosen it.
    • Note: The drain plug is aluminum and has a magnetic tip. Be careful not to round it off; use a well-fitting tool and don't overtighten when reinstalling. Wipe the magnet clean to remove any metallic debris from the clutch and gears before reusing it .
  4. Drain the Old Oil
    • Place your drain pan beneath the plug and allow all oil to drain out.
    • The EC 300 transmission holds just 900cc (0.9 liter) of oil, so expect a relatively small amount to come out .
    • Let the oil drip for several minutes to ensure complete drainage.
  5. Inspect and Reinstall the Drain Plug
    • Check the drain plug's magnet for metallic shavings and clean thoroughly.
    • Screw the plug back into the case by hand to avoid cross-threading. If possible, use a torque wrench to tighten it to factory specifications.
  6. Locate the Filler Plug
    • Model quirk: The EC 300's fill plug is on the right side and is quite small. Some owners find it easier to tilt or even lightly lay the bike over to improve access .
    • Remove the fill plug with your Allen wrench.
  7. Refill with Fresh Oil
    • Using a clean funnel and graduated container, pour in 900cc of fresh transmission oil. Overfilling can cause leaks or frothing; underfilling can risk transmission damage.
    • Pour the oil slowly, ensuring it doesn't overflow due to the tiny fill hole .
  8. Reinstall the Filler Plug
    • Tighten the plug snugly – again, do not overtighten to avoid stripping.
    • Clean up any spills with a paper towel or rag.
  9. Reinstall Skid Plate
    • Once finished, replace the skid plate if you removed it earlier.
  10. Start & Check
    • Start the bike, let it idle, and inspect for any leaks around plugs.
    • Check oil level or window (if equipped) after circulation. Top off if needed.

Model-Specific Notes for the 2013 GAS GAS EC 300

  • The oil fill hole is small and awkwardly placed. Many owners tip the bike over for easier access – take care to avoid spills.
  • No oil filter needed: The EC 300—s oil is for the clutch and gears only, not engine lubrication; there's no filter to replace .
  • The factory drain plug is aluminum and magnetic. Inspect for wear or rounding each oil change to avoid future headaches.
  • Skid plate fitment is critical – aftermarket plates without an access hole will complicate oil changes.
  • Only 900cc oil capacity. Double check with the manual, but never exceed this amount.

Maintenance Intervals & Final Tips

  • Change your EC 300 transmission oil every 10-15 riding hours, or after any particularly demanding ride.
  • Keep an eye on clutch feel and shifting quality; dark or gritty oil means an earlier change is wise.
  • Dispose of used oil responsibly at a motorcycle shop or recycling center.

Changing the oil on your 2013 GAS GAS EC 300 is quick, simple, and pays long-term rewards in riding reliability and gearbox health. For all your dirt bike maintenance needs, trust MotoSport.com – your factory performance headquarters.

Related Shopping Categories

Shop Motor Oil for a 2013 GAS GAS EC 300 Dirt Bike.

Shop Oil Filters for a 2013 GAS GAS EC 300 Dirt Bike.

Shop Oil Drain Pans for a 2013 GAS GAS EC 300 Dirt Bike.

Shop Tools for a 2013 GAS GAS EC 300 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2013 GAS GAS EC 300 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.