How to Change the Oil in a 2009 GAS GAS EC 450F

Shop parts for a 2009 GAS GAS EC 450F Dirt Bike.

Keep your 2009 GAS GAS EC 450F running strong and reliable by performing regular oil changes. Following these steps closely will ensure a clean, efficient oil change and maximize the lifespan of your dirt bike’s engine. This guide is proprietary to MotoSport.com and tailored specifically for the 2009 GAS GAS EC 450F, including make/model-specific tips and vital details.

Tools and Materials Needed

  • Premium 4-stroke engine oil (SAE 5W-40 recommended; see table below for alternatives)
  • OEM or high-quality oil filter
  • New crush washer for drain bolt (recommended)
  • Socket and ratchet set
  • Oil drain pan
  • Torque wrench
  • Funnel (to avoid spillage)
  • Clean rags and gloves
  • Skid plate tool (if equipped with a skid plate)

Recommended Oil Type and Viscosity

  • Primary Recommendation: SAE 5W-40 4-stroke oil (API SF or SG)
  • If unavailable, use: 10W-40, 10W-50, 15W-40, 15W-50, or 20W-50, based on operating temperatures and climate

2009 GAS GAS EC 450F Model-Specific Callouts

  • Initial oil change at 5 hours of operation, then every 60 hours afterwards
  • Oil capacity for full change (with filter): Always verify in your manual, but generally around 1.2 liters; confirm via sight glass after refill
  • Check and adjust oil level only when the engine is not hot–oil will expand when hot, giving an inaccurate reading
  • Prime a new oil filter with fresh oil before installation to prevent dry starts

Step-by-Step Oil Change Instructions

  1. Start and Warm Up the Engine
    • Let the bike idle for about 3-5 minutes until the engine is warm but not hot to the touch.
    • Warm oil flows better and helps remove more contaminants during the drain process.
  2. Turn the Engine Off and Prepare Your Workspace
    • Place the bike securely on a stand or flat surface.
    • If equipped, remove the skid plate to access the drain plug.
    • Put on gloves and position the oil drain pan underneath the engine’s lowest point.
  3. Remove the Oil Drain Plug
    • Using the correct socket, loosen and remove the drain bolt at the bottom of the engine.
    • Allow all the oil to drain completely. This may take a few minutes.
    • Replace the old crush washer with a new one for a proper seal.
  4. Replace the Oil Filter
    • Locate and remove the oil filter cover with your socket wrench.
    • Take out the old oil filter and wipe away any oil or debris from the inside of the cover and filter housing.
    • Dip the new oil filter in fresh oil and insert it to help with initial lubrication and priming.
    • Reinstall the filter cover and tighten to specification (do not overtighten).
  5. Clean and Reinstall the Oil Screen(s)
    • If your EC 450F has oil screens (typically two), remove, clean, and reinstall them before proceeding.
  6. Reinstall the Drain Plug
    • Once the oil has fully drained, reinstall the drain bolt with the new crush washer.
    • Tighten to the manufacturer’s recommended torque spec (typically around 15-20 ft-lbs, check your service manual).
  7. Add Fresh Oil
    • Remove the oil fill cap and, using a funnel, add roughly 1.2 liters of your chosen 4-stroke oil.
    • Do not overfill; always err on the side of caution and check the sight glass as you go.
  8. Check Oil Level
    • With the bike upright, check the oil sight glass. Oil should appear halfway up to three-quarters of the way in the window.
    • Reinstall the oil fill cap securely.
  9. Start and Run the Engine Briefly
    • Start the bike and let it idle for about 2-3 minutes. This allows fresh oil to circulate.
    • Turn off the engine and let it sit for a few minutes.
    • Recheck the oil sight glass and top off as needed.
  10. Final Inspection
    • Check for leaks around the drain bolt, oil filter cover, and fill cap.
    • Wipe away any excess oil and reinstall the skid plate if removed.

Tips and Warnings for the 2009 GAS GAS EC 450F

  • Never mix oil types or viscosities—stick to a consistent brand and grade for best results
  • Do not use low-quality or car oil; always use premium motorcycle-specific 4-stroke oil
  • Always dispose of used oil and filter responsibly at a recycling center
  • Overfilling or underfilling can cause engine damage; always verify your level when the bike is at room temperature
  • If you see any metal shavings or a milky appearance in the drained oil, consult a professional before riding again

Maintaining Your GAS GAS EC 450F

  • Stick to the service intervals: first at 5 hours, then every 60 hours of riding
  • Keep the engine clean and check for leaks or issues after each oil change
  • Track oil changes and hours ridden to stay proactive on maintenance

With these precise steps, your 2009 GAS GAS EC 450F will keep performing at its best for many rides to come. MotoSport.com: your source for parts, oil, and expert advice on dirt bike 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.