How to Change the Oil in a 2008 GAS GAS EC125

Shop parts for a 2008 GAS GAS EC125 Dirt Bike.

Keeping your 2008 GAS GAS EC125 in peak condition requires routine maintenance, with regular oil changes at the core of engine longevity. This step-by-step guide, proprietary to MotoSport.com, will walk you through everything you need to safely and efficiently change the oil in your EC125, including the specific tools, tips, and model-specific call-outs every owner should know.

Tools and Materials Needed

  • Socket wrench set (with 8mm and 13mm sockets preferred)
  • Drain pan
  • Funnel
  • Clean rags or shop towels
  • Flathead screwdriver
  • New gear oil (SAE 75W/80 or as specified in your service manual)
  • New drain bolt washer (crush washer)
  • Torque wrench (strongly recommended for proper bolt torque)
  • Protective gloves

Preparation

  • Make sure the bike is on a level surface using a bike stand for stability.
  • Let the engine run for a few minutes to warm the oil. Warm oil drains faster and brings out debris. Then, turn off the engine and let it cool until safe to touch.

Step-by-Step Process

  1. Remove the Skid Plate (if equipped)
    • Some EC125s are fitted with a skid plate. Use the socket wrench to remove the bolts and carefully set the plate aside.
  2. Locate the Drain Plug
    • The drain plug is on the lower right side of the engine, under the crankcase. Refer to your service manual if you have trouble identifying it.
  3. Drain the Old Oil
    • Position your drain pan directly beneath the plug.
    • With the 13mm socket, carefully loosen and remove the drain plug. Let all the oil fully drain out. To speed up draining, pop open the oil fill cap (on the right engine side) using a flathead screwdriver.
    • Check the oil for signs of metal fragments, water, or severe darkening, which could signal other issues.
  4. Replace the Crush Washer
    • Always install a new crush washer on the drain bolt to prevent leaks.
    • Inspect the plug for striping or metal slivers stuck on the magnet (if equipped), and clean as needed.
  5. Reinstall the Drain Plug
    • Screw the drain bolt in by hand, then torque to specification (typically around 12–15 Nm, but check your GAS GAS manual).
  6. Refill with Fresh Oil
    • Use the funnel to pour in new gear oil. The EC125 typically requires ~0.7 liters (700ml) but always double-check your manual for the exact quantity (service manual reference).
    • Replace the fill cap securely.
  7. Check Oil Level
    • With the bike upright and level, check the oil inspection window or use the dipstick if equipped, ensuring the oil reaches the “full” mark but isn‘t overfilled.
    • Wipe away any spillage and clean the area around the fill cap.
  8. Test the Engine
    • Start the engine and let it idle for a minute. Check for leaks at the drain plug and oil fill cap.
    • Shut off the engine, let it settle, and recheck the oil level. Top off if necessary.

Specific Call-Outs for the 2008 GAS GAS EC125

  • No Oil Filter Change Required: The EC125 uses a two-stroke engine with a separate gearbox; there is no oil filter to change—only the gearbox oil.
  • Recommended Oil: Use only high-quality 75W/80 or 80W/85 motorcycle gear oil. Avoid automotive oils, as they may cause clutch slip or inadequate lubrication.
  • Drain Location: The drain plug is small—be careful not to overtighten.
  • Oil Quantity: Always consult your model‘s specific manual as overfilling can lead to shifting issues and underfilling risks transmission damage.
  • Inspect Seals: If you notice milky oil or unexpected fluid loss, inspect for potential crankcase or water pump seal wear, both common in older EC125s.

Tips for a Cleaner Oil Change

  • Place cardboard or an absorbent mat under the work area to prevent stains.
  • If oil seems particularly dirty after a short period, consider inspecting the clutch or gearbox for excessive wear.
  • Dispose of used oil responsibly by taking it to an approved recycling center.

Conclusion

Changing oil in a 2008 GAS GAS EC125 is quick, straightforward, and a key step in dirt bike care. Performing regular oil changes—ideally every 10 hours of riding or at least every few rides—ensures optimal clutch engagement, smooth shifting, and engine longevity. Keeping these model-specific call-outs in mind will help you get back on the trail—confident, clean, and ready for adventure. Gear up, get it done, and let your next ride with MotoSport.com begin.

Related Shopping Categories

Shop Motor Oil for a 2008 GAS GAS EC125 Dirt Bike.

Shop Oil Filters for a 2008 GAS GAS EC125 Dirt Bike.

Shop Oil Drain Pans for a 2008 GAS GAS EC125 Dirt Bike.

Shop Tools for a 2008 GAS GAS EC125 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2008 GAS GAS EC125 Dirt Bike.

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.