How to Change the Oil in a 2013 GAS GAS EC300F: MotoSport.com Guide

Shop parts for a 2013 GAS GAS EC300F Dirt Bike.

Changing the oil in your 2013 GAS GAS EC300F is a crucial part of maintenance that not only prolongs engine life but also ensures optimal performance on the trails. This bike, being a two-stroke, shares many oil change characteristics with its close relatives from 2011–2012. This guide is developed exclusively for MotoSport.com and walks you through every step, supplying model-specific tips you won’t find elsewhere.

Tools & Supplies Needed

  • 6mm Allen socket or wrench (for drain and fill plugs)
  • Socket wrench or Allen driver
  • Oil catch pan
  • Funnel with flexible spout (angled or flexible is best)
  • 1 liter of Motorex Cross Power 4T 10W/50 (or equivalent, use 900ml/cc)
  • OEM oil filter (if applicable)
  • New crush washer (recommended; helps prevent leaks)
  • Rags/paper towels (for cleanup)
  • Gloves (keep your hands clean and safe)
  • Skid plate removal tools (if equipped with aftermarket plate)

Before You Begin

  • Always warm the bike up for a few minutes to help the oil drain more completely.
  • Ensure the bike is stable on a stand or held upright securely.

Step-by-Step Oil Change Process

  1. Remove the Skid Plate (if equipped):
    • You may need to remove the stock or aftermarket skid plate to access the drain plug. The 2013 EC300F is similar to earlier models, so use your Allen to unscrew the mounting bolts and set the plate aside. Note that some plates have a pre-cut hole for oil changes, but not all.
  2. Drain the Old Oil:
    • Locate the drain plug at the lowest point of the engine (“on the bottom” as referenced in user accounts). Use a 6mm Allen wrench or socket to loosen and remove it over your catch pan. Be careful—the oil may be hot.
    • Let all oil drain out. Inspect the magnetic tip of the drain plug for metal particles: tiny flecks are normal, but chunks signal internal wear and should prompt deeper inspection.
  3. Replace the Crush Washer:
    • Remove the old crush washer and install a new one onto the drain plug to ensure a proper seal and prevent leaks.
  4. Reinstall the Drain Plug:
    • Clean the drain plug and sealing surface. Reinstall and tighten it securely. Do not overtighten—just snug is enough to avoid stripping threads.
  5. Lay the Bike Down (Model-Specific Tip):
    • The fill plug location is awkwardly placed on the 2013 EC300F, just like the 2012 model. It’s often necessary to tilt or gently lay the bike over (resting it against a wall) to make pouring easier, since the fill hole is at an angle and hard to access upright.
  6. Remove the Fill Plug:
    • Use your Allen wrench to remove the fill cap.
  7. Add New Oil:
    • Using a funnel with a flexible spout is highly recommended. Pour in 900ml (0.9 liters) of 10W-50 fully synthetic four-stroke motorcycle oil, such as Motorex Cross Power 4T 10W/50.
    • Take your time to avoid spills; because of the angled fill hole, a flexible or bendable funnel makes this much easier. Some riders heat and bend their funnel for a better fit, but an angled design works well off the shelf.
  8. Reinstall the Fill Plug:
    • Clean the area around the fill cap, replace and tighten it with your Allen wrench.
  9. (Optional) Replace the Oil Filter:
    • If you have an oil filter on your EC300F (rare for two-strokes, but some models/engine variants include it), replace it at this time. Be sure to follow the manufacturer’s recommendation for filter orientation and torque specs.
  10. Wipe Down & Inspect:
    • Wipe away drips, check for leaks around the drain and fill plugs.
    • Start your engine and let it idle briefly, then inspect again for leaks.
  11. Reinstall the Skid Plate:
    • If removed, bolt the skid plate back on, verifying all mounting points are secure.

Special Call-Outs for the 2013 GAS GAS EC300F

  • The oil fill port is small and angled—tilting the bike or using a specially designed funnel drastically reduces spills and frustration.
  • Only 900ml of oil is required—do not overfill.
  • Inspect drain plug for metallic debris each oil change. Small flecks are expected, but shavings or large bits may indicate a problem.
  • If you have an aftermarket skid plate, it may require removal, unless it has a purpose-built oil service hole.
  • No oil filter on most EC300F two-strokes, but if fitted, always swap for fresh.

Pro Tips for a Mess-Free Oil Change

  • Consider investing in an anodized aluminum Oil Drain Tool to direct oil cleanly past obstructions and eliminate spillage.
  • Running the engine for a minute or two (not too long) warms the oil, helping it drain faster and more thoroughly.
  • Dispose of used oil responsibly. Most auto parts stores accept used oil for recycling.

Changing your oil regularly is the simplest way to ensure your 2013 GAS GAS EC300F delivers top-notch performance every ride. All parts and supplies can be found at MotoSport.com.

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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.