How to Change the Oil in a 2007 GAS GAS EC200

Shop parts for a 2007 GAS GAS EC200 Dirt Bike.

Changing the transmission (gearbox) oil in your 2007 GAS GAS EC200 is a vital part of your maintenance routine. This guide, proprietary to MotoSport.com, delivers comprehensive, step-by-step instructions, tool lists, and key model-specific notes to ensure you tackle the job with confidence and care.

Tools & Supplies Needed

  • Socket set (for drain and fill plugs, typically 13mm or 14mm, but confirm size)
  • Torque wrench (for proper drain and fill bolt tightening)
  • Drain pan
  • Funnel (essential due to awkward fill plug position)
  • Measuring cup (to ensure accurate oil quantity–900 ml for this model)
  • Rags (for cleanup)
  • Replacement transmission oil (manufacturer recommends 10W-40 or dedicated 2-stroke gearbox oil; check manual for preference)
  • Parts cleaner or brake cleaner (optional, for cleaning drain plug and case area)

Specific Notes for the 2007 GAS GAS EC200

  • This is a two-stroke motorcycle; the engine crankcase is separate from the transmission, and you are changing only the gearbox (transmission) oil—not engine oil.
  • Two drain plugs: One is for the transmission oil (located at the rear of the engine case), while the other (towards the front, left side) is a crankcase drain used mainly for draining water if the bike is swamped. Only remove the oil drain plug when changing oil. Opening the crankcase drain is unnecessary during a regular oil change and may cause confusion if used incorrectly.
  • The fill point is tucked away and difficult to access; using a small funnel is strongly recommended to avoid spillage and mess.
  • The base oil capacity for this model is approximately 900 ml. Overfilling or underfilling can harm transmission performance.
  • Always examine the oil drain plug magnet for metal debris. A small amount of metallic paste or tiny flakes is normal. Large pieces or excessive shavings indicate potential internal wear and should be investigated further.

Step-by-Step Oil Change Instructions

  1. Warm Up Your Bike
    • Start the engine and let it idle for 3-5 minutes. This helps circulate and warm the oil, making it easier to drain fully.
    • Shut off the engine and let it rest for a minute or two to slightly cool, but don’t let the oil get cold.
  2. Position the Bike & Prepare Workspace
    • Stand the bike upright on a flat surface using a stand. Ensure stability for a spill-free job.
    • Lay out rags and position a drain pan directly beneath the transmission oil drain plug (not the crankcase drain plug).
  3. Remove the Transmission Filler Plug
    • Remove the transmission oil filler plug/cap at the top of the case. This lets air in and ensures oil drains smoothly.
  4. Remove the Transmission Drain Plug
    • Using your socket, remove the correct drain plug (usually rearmost on the engine bottom).
    • Let all the oil flow into the drain pan. Allow several minutes for full drainage. Tip the bike gently side-to-side if needed (standing upright), to remove residual old oil.
    • If you accidentally open the smaller, more forward crankcase drain plug and only water or blue-tinged fluid comes out, simply screw it back in. No further action needed unless you recently submerged the bike.
  5. Inspect the Drain Plug
    • Transmission drain plugs are magnetic to collect metallic particles.
    • Clean the plug thoroughly. Small metal dust or “sludge” is normal—if you see large chunks or curls of metal, seek mechanical inspection.
  6. Reinstall and Torque the Drain Plug
    • Wipe the threads and mating surface clean.
    • Reinstall the drain plug using a torque wrench set to manufacturer specs (typically between 10-20 Nm; always confirm in your model’s service manual).
    • Do not over-tighten to avoid case damage.
  7. Add New Transmission Oil
    • Measure 900 ml of new oil. Always use the oil recommended in your user manual or a top-tier synthetic two-stroke gearbox oil.
    • Insert your funnel into the fill hole and carefully pour in the oil.
    • Wait a minute for the oil to settle, as the fill passage is often small and slow to drain.
    • Reinstall the fill plug and torque it to spec.
  8. Prime the Transmission & Final Checks
    • Before starting, gently kick the engine through several times with the kill switch engaged so oil distributes inside the gearbox.
    • Start the engine, let it idle for 1 minute, then inspect both the fill and drain plugs for leaks.
    • Wipe any spills and check your oil level via the sight glass or inspection bolt (if equipped).

Important Model-Specific Tips & Cautions

  • Do not use the crankcase drain plug unless the bike was submerged in water; it is not intended for routine oil changes.
  • Always use fresh, high-quality oil. Reusing oil or mixing types can cause clutch slippage or poor shifting.
  • Replace washers or crush gaskets on the drain plug at least every few changes to prevent leaks.
  • Be patient when adding oil; the fill hole is small and overfilling is easy.
  • Dispose of used oil responsibly in accordance with local regulations.

Conclusion

Following these steps ensures smooth shifting, long gearbox life, and consistent clutch action on your GAS GAS EC200. Keep up with this service every 10-15 operating hours or after every two or three long rides, especially in wet or dusty conditions.

For all your dirt bike parts, lubricants, and maintenance needs, trust MotoSport.com—your source for expert advice and quality gear.

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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.