How to Change the Oil in a 2007 GAS GAS EC 450F

Shop parts for a 2007 GAS GAS EC 450F Dirt Bike.

Keeping your 2007 GAS GAS EC 450F running strong requires regular oil changes to protect the engine and maximize its lifespan. This comprehensive MotoSport.com guide delivers everything you need to know—including tools and steps specific to this model—along with important call-outs so you can complete the job confidently and correctly.

Tools and Supplies Needed

  • Socket set (10mm, 13mm recommended for main oil drain and access bolts)
  • 5mm Allen wrench (for oil screen covers and drain bolts)
  • Oil drain pan
  • New oil filter (OEM or high-quality compatible)
  • New crush washer for drain bolt
  • Measuring cup (for precise oil quantity)
  • Rags or shop towels
  • Safety gloves and eyewear
  • Motorex Cross Power 4T 10W/50 Full Synthetic Engine Oil (1.27 quarts / 1.2 liters recommended)
  • Contact cleaner (optional, for cleanup)

Pre-Change Preparation

  • Warm up the engine: Briefly let the bike idle for several minutes in a well-ventilated area. This helps the oil flow out smoothly and removes more debris.
  • Stabilize the bike: Use a center stand, lift, or sturdy bike stand to keep the motorcycle upright and secure during the oil change.
  • Remove the skid plate: If equipped, to access the drain plugs and oil screen. The 2007 EC 450F often has a skid plate secured with 4-6 bolts.

Oil Change Procedure

  1. Locate the drain plugs and oil screen covers
    • Your EC 450F typically has a main drain bolt beneath the engine and one or more oil screen covers (small screws with screens behind them).
    • Clean dirt or debris from the area to prevent contamination.
  2. Drain the old oil
    • Place the drain pan under the engine.
    • Remove the main drain bolt using the socket or T-handle. Allow the oil to fully drain. Expect approximately 1.2–1.3 quarts (1.1–1.2 liters) of oil to flow out, depending on whether you remove the oil filter and screens too.
    • Inspect the drain bolt and washer for wear or metal filings. Replace the crush washer with a new one.
  3. Remove and clean the oil screens
    • Locate side or bottom cover(s) for oil screens, usually held with a 5mm Allen bolt.
    • Gently pull out the screens and wipe them clean with a lint-free rag. Inspect for metallic debris, which could indicate internal engine wear.
    • Spray with contact cleaner if needed. Reinstall screens once clean.
  4. Replace the oil filter
    • Unlock the filter cover (usually 2-3 bolts on the side of the engine) and remove the old oil filter.
    • Check the filter for excessive debris or metallic particles.
    • Install a new filter, ensuring the rubber seal is seated properly and the filter is facing the correct direction (refer to your manual; the open end typically faces outwards).
  5. Reinstall all plugs, screens, and covers
    • Torque all drain bolts, screen covers, and oil filter covers to the manufacturer’s specs. For the EC 450F, the drain bolt is usually torqued to around 12–15 Nm (8.8–11 ft-lbs).
  6. Add new oil
    • Pour in 1.27 quarts (1.2 liters) of 10W/50 full synthetic 4T oil (Motorex or equivalent) into the oil filler cap.
    • Allow oil to settle for a minute. Check the oil level using the window or dipstick (if equipped). Top off as needed until level is correct.
  7. Start the engine and check for leaks
    • Start the bike and let it idle for a minute.
    • Shut down, wait a few minutes, and check for leaks around the drain and filter areas. Re-check oil level and top off if needed.
  8. Reinstall the skid plate and cleanup.

Model-Specific Callouts for 2007 GAS GAS EC 450F

  • Oil Quantity: Always use 1.2 liters (approx. 1.27 quarts) of 10W/50 4T oil when replacing the filter and cleaning screens. Overfilling can damage engine seals.
  • Oil Screens: The EC 450F engine features two internal oil screens that catch debris. Cleaning these is as critical as changing the oil and filter.
  • OEM Filters and Crush Washers: Use only OEM or certified aftermarket oil filters and fresh crush washers to avoid leaks and ensure correct pressure.
  • Drain Plug Torque: Do not overtighten drain or screen bolts—aluminum threads strip easily.
  • Check for Debris: Regularly check screens and filter for excess metal shavings, which could signal abnormal internal wear.

Final Tips

  • Oil changes should be performed every 10–15 engine hours under heavy riding or racing conditions, or at least every 500 miles under moderate use.
  • Keep a log of each service with the type and amount of oil used for warranty and resale purposes.
  • Dispose of old oil and filters responsibly at a certified recycling center.

Properly changing your oil ensures your 2007 GAS GAS EC 450F remains reliable and ready for every ride. For OEM filters, oil kits, and more service parts, shop MotoSport.com, your source for dirt bike maintenance and hard-to-find GAS GAS essentials.

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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.