How to Change the Oil in a 2014 GAS GAS EC300E
Shop parts for a 2014 GAS GAS EC300E Dirt Bike.
Maintaining your 2014 GAS GAS EC300E with fresh transmission oil is essential for optimal performance and longevity. Here’s a detailed, proprietary MotoSport.com guide to make this maintenance job straightforward and frustration-free.
Tools and Materials Needed
- Allen wrench (6mm is common for GAS GAS drain plugs; verify with your model)
- Socket wrench set (optional but helpful for stubborn bolts)
- Oil catch pan
- Funnel (preferably with a flexible or angled spout)
- Clean rags or paper towels
- Replacement transmission oil (900cc of high-quality 2-stroke gear/transmission oil; check owner’s manual for recommendations and viscosity)
- Replacement crush washer for the drain bolt (optional but recommended)
- Torque wrench (for reinstalling drain bolt to correct specification)
Step-by-Step Oil Change Procedure
-
Warm Up the Engine
Start and idle the bike for a few minutes. This warms the oil, allowing it to drain more thoroughly by reducing viscosity. -
Stabilize and Prepare the Bike
Place the bike securely on a stand. Ensure it won’t tip over during maintenance. Place your oil catch pan beneath the engine. -
Remove the Skid Plate (if equipped)
Using your Allen wrench, remove the bolts holding on the skid plate. This exposes the drain bolt. Many GAS GAS EC300 models have a hole in the factory skid plate for oil changes, but aftermarket versions may not. Remove the plate if this is the case for your bike or if access is tight.
Specific call-out for 2014 EC300E: The drain plug access may be partially obstructed by some aftermarket skid plates, so verify access before proceeding. -
Loosen and Remove the Drain Bolt
Locate the drain bolt on the underside of the engine. Using the Allen key, carefully unscrew it and let the oil drain completely into your catch pan.
Be mindful of the washer – if it’s damaged or badly compressed, replace it.
Pro Tip: Lean the bike slightly away from the drain side to help oil flow more fully out of the transmission case. -
Replace and Re-torque the Drain Bolt
When oil has finished draining, inspect and clean the drain bolt, then fit a new crush washer (recommended). Reinstall the drain bolt and tighten it to your service manual’s torque specification to avoid over-tightening or stripping threads. -
Refill with Fresh Oil
The oil fill plug is typically found on the right side of the engine case. It’s often small and awkwardly positioned on these bikes. Using your funnel, pour in 900cc of fresh, manufacturer-recommended transmission oil.
Specific call-out for 2014 EC300E: The filler opening is small and at an angle. A flexible-spout or bent funnel works best. Many owners tip the bike slightly to help oil flow in more easily. Do not overfill; measure carefully for best results. -
Reinstall the Filler Cap and Skid Plate
Once the oil is poured in, replace and tighten the filler cap. If you removed the skid plate, bolt it back on. -
Check for Leaks and Clean Up
Wipe down any spilled oil. Start the engine, let it idle for a minute, then check the oil check level (if equipped) and inspect for leaks at the drain and fill locations. -
Dispose of Old Oil Responsibly
Transfer the used oil to a sealed container and take it to an authorized oil recycling facility.
2014 GAS GAS EC300E Oil Change Owner Tips
- Oil Capacity: The 2014 EC300E transmission case takes 900cc (0.9L) of oil—double-check your model’s manual for confirmation.
- Filler Location: The oil fill opening is notably small and awkwardly located at an angle. A bent or flexible funnel is highly recommended.
- Skid Plate Fitment: Some aftermarket skid plates may block access to the oil drain plug. Factory plates usually provide a hole for access, but installation may still be tight.
- Oil Recommendation: Use a high-quality 2-stroke gear oil. Many owners have success with oils recommended in the manual or premium motorcycle gear/transmission oils to protect gears and clutch components.
- Fun Fact: Laying the bike slightly against a wall (with proper padding) can help angle the fill hole upward, simplifying the refill process.
- Check for Metal: Inspect the drained oil for metal shavings. Small amounts are normal after break-in, but large amounts or glittery oil could indicate excessive wear or looming transmission issues.
Changing the transmission oil on your 2014 GAS GAS EC300E is a straightforward task that, when performed regularly, ensures lasting performance—on the trail or the track. Keep your tools clean, measure oil accurately, and use quality lubricants for best results every ride.
Proudly proprietary instructions by MotoSport.com.
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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.