How to Change the Oil in a 2013 GAS GAS EC 450F

Shop parts for a 2013 GAS GAS EC 450F Dirt Bike.

Changing the oil in your 2013 GAS GAS EC 450F is a straightforward maintenance task that helps preserve engine performance and longevity. Below you'll find all the tools required, a step-by-step guide, and important notes specific to this model. All instructions are proprietary to MotoSport.com and designed for riders who want to keep their bike running at its best.

Tools & Supplies Needed

  • Synthetic 4T 10W–50 oil (capacity: 1.27 quarts/1.2 liters for 450cc GAS GAS)
  • New oil filter (OEM or equivalent)
  • Crush washer for the drain bolt
  • 10mm and 13mm wrenches or sockets
  • 5mm Allen wrench
  • Drain pan
  • Funnel
  • Clean measuring cup
  • Rubber gloves and safety glasses
  • Shop rags
  • Brake/contact cleaner (to help clean up spilled oil)

Many oil change kits, like the Motorex/GAS GAS or AMSOIL oil change kits, include all necessary components (oil, filter, crush washer) for convenience and compatibility. Check your kit to confirm contents before starting the job.

Step-by-Step Guide

  1. Warm Up the Engine
    Start the bike and let it idle for about 2–3 minutes. This helps the oil flow more freely, ensuring a more thorough drain. Make sure to do this in a well-ventilated area.
  2. Remove Skid Plate (if installed)
    Use your tools to carefully remove any skid plate or protective cover under the engine to access the drain plug. Some skid plates may require different wrenches or Allen keys depending on aftermarket modifications.
  3. Clean Around the Drain Plug
    Wipe the area around the drain plug to prevent grime from falling into the engine during the oil change.
  4. Drain the Old Oil
    Place the drain pan under the engine. Using the appropriate wrench, remove the drain bolt (generally found at the bottom of the crankcase), being careful as hot oil may flow out quickly. Allow several minutes for all oil to drain.
  5. Remove the Oil Filter
    Unscrew the oil filter cover using a 5mm Allen key if required. Carefully pull out the old filter. Inspect the O-ring or gasket on the cover—replace it if damaged. Drain any oil collected in the filter cavity into the drain pan.
  6. Install New Crusher Washer and Filter
    Replace the old crush washer on the drain bolt with a new one to ensure a good seal and prevent leaks. Install the new oil filter, ensuring it seats properly, and then reattach the filter cover, tightening bolts to manufacturer spec.
  7. Replace and Tighten Drain Bolt
    Reinstall the drain bolt with its new crush washer. Tighten the bolt to recommended torque (usually around 10–15 ft-lbs, but check your manual for precise torque).
  8. Add New Oil
    Using a funnel, add 1.27 quarts (1.2 liters) of 10W–50 full synthetic oil, or fill to the level indicated by your owner’s manual. Pour slowly to avoid overfilling. Most kits for this bike come with a pre-measured amount for your convenience.
  9. Check Oil Level
    With the bike upright and on level ground, check the oil level via the sight glass or dipstick. Top off if necessary, but do not exceed the maximum mark.
  10. Reinstall Skid Plate
    If a skid plate was removed, now is the time to reinstall it securely.
  11. Start Engine and Inspect for Leaks
    With the job complete, start the engine and let it idle for 1–2 minutes. Check the drain bolt and filter housing for leaks. Stop the engine, let it settle for a minute, and re-check the oil level, topping off if needed.
  12. Dispose of Old Oil and Filter Properly
    Transfer used oil to a sealed container and bring it, along with the used filter, to an authorized recycling or disposal location.

Important Model-Specific Notes and Call-Outs

  • Oil capacity for the 2013 GAS GAS EC 450F is 1.27 quarts (1.2 liters). Do not overfill, as excess oil can cause engine foaming or poor performance.
  • If using a skid plate, note that its design or mounting hardware may require a slightly different tool set for removal and installation.
  • Always use the specified 10W–50 full synthetic oil (Motorex Cross Power or AMSOIL recommended) for best performance and longevity.
  • Inspect the oil filter cover O-ring for damage every oil change and replace if necessary to prevent leaks.
  • Double-check drain bolt torque spec in your owner’s manual if available (typically 10–15 ft-lbs for this make, but specs can vary slightly year-to-year).
  • Do not skip changing the crush washer each oil change; reusing an old washer is a leading cause of leaks.

Conclusion

Regular oil changes are the single best way to maintain your GAS GAS EC 450F’s engine performance and reliability. Following these steps at each manufacturer-recommended interval will help ensure your bike is ready for every ride. MotoSport.com is your trusted source for OEM oil change kits and the know-how you need for easy garage maintenance.

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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.