How to Change the Oil in a 2019 GAS GAS EC 300: A Step-by-Step Guide

Shop parts for a 2019 GAS GAS EC 300 Dirt Bike.

Changing the oil in your 2019 GAS GAS EC 300 is essential to keep your bike's transmission and clutch running smoothly. This two-stroke motorcycle doesn't use engine oil in the traditional way four-strokes do, but it still requires regular changes of the transmission oil. This guide will walk you through the process, provide a list of tools you'll need, and point out specific details important for this model. Proprietary to MotoSport.com.

Tools and Materials Needed

  • 6mm Allen socket (or Allen key; socket preferred for torque and fit)
  • Socket wrench
  • Oil catch pan
  • Measuring cup or graduated container
  • Fresh transmission oil (recommended: 75W or manufacturer-suggested weight)
  • Clean funnel (with narrow spout recommended due to small fill hole)
  • Paper towels or shop rags
  • Parts cleaner/brake cleaner (optional, for cleaning drain plug)
  • Magnetic drain plug (stock plug is magnetic; just clean and reuse)
  • Skid plate removal tools: Allen wrenches (if you use an aftermarket or factory skid plate)
  • Gloves (optional, but recommended)

Before You Start

  • Engine should be warm but not hot - a short 2-3 minute ride helps thin out the oil for better draining.
  • Always double-check you have the correct oil type and quantity. The 2019 EC 300 takes approximately 900cc of transmission oil.
  • Have plenty of paper towels handy - dripping oil is normal, especially with the awkward fill location.

Step-by-Step Oil Change Guide

  1. Remove the Skid Plate (If Installed)
    • The drain plug sits on the engine case just under the bike, right through a hole in the factory skid plate.
    • If you have an aftermarket plate or a thicker guard, you might need to remove or loosen it for better access.
  2. Position the Oil Catch Pan
    • Place your pan directly beneath the drain plug. If possible, slightly tilt the bike using a bike stand for a more complete drain.
  3. Remove the Drain Plug
    • Use the 6mm Allen socket to loosen the drain plug. Remember: Lefty-loosey.
    • The drain plug is magnetic. This is by design, attracting metallic debris from the clutch or gears. Note any excessive build-up - a little is okay, but piles of shavings might indicate internal wear.
  4. Let the Oil Drain Completely
    • You may lean the bike slightly from side to side to get more oil out.
    • Some riders crank the starter (with kill switch pressed to prevent the engine starting) for a second or two to shake loose stubborn old oil.
  5. Clean and Inspect the Drain Plug
    • Wipe the plug clean. If using parts cleaner, spray it down and dry before reinstalling.
    • Inspect the aluminum threads on the plug - don't overtighten when reinstalling because the case is soft aluminum.
  6. Reinstall the Drain Plug
    • Screw the plug back in hand-tight, then snug using the Allen socket. If you have a torque wrench, set to manufacturer's specs (typically around 10 Nm, but check your manual).
    • Do not overtighten - stripping the case threads is expensive and time-consuming to fix.
  7. Remove the Oil Fill Plug
    • The fill plug is on the right-side case and is quite small - a funnel with a narrow spout is helpful.
    • You may need to tilt the bike slightly to fill effectively, but be cautious to avoid spills.
  8. Add Fresh Oil
    • Pour 900cc (0.9L) of fresh transmission oil slowly into the fill hole.
    • Do a quick check though the oil window (if equipped; some years and trims may lack this) or just measure carefully.
    • Wait a minute for oil to settle - it's better to underfill slightly and top up than to risk overfilling.
  9. Reinstall the Fill Plug
    • Thread in by hand to avoid cross-threading. Gently tighten; the aluminum is soft and does not need extreme force.
  10. Dispose of Used Oil Responsibly
    • Always recycle used oil at an authorized collection center or your local MotoSport.com shop.

Specific Model Call-Outs: 2019 GAS GAS EC 300

  • Engine Oil Capacity: 900cc (0.9L).
  • No oil filter to change this two-stroke's transmission/clutch oil is changed only via drain and fill plugs.
  • Fill and Drain locations: Both require Allen wrenches, and the fill plug is notably small and easy to spill.
  • Drain plug is magnetic - clean debris every oil change.
  • If you have a factory or aftermarket skid plate, you may need to remove or loosen it for easy access.
  • The fill process may be awkward - using a long-neck funnel or even a giant syringe can make things easier.
  • This oil change covers only the clutch/transmission oil - make sure to keep your two-stroke premix system clean and properly filled.

Pro Tips

  • Change the oil after every 10-15 hours for most riders; more often for racing or severe conditions.
  • Keep a record of your oil changes for future reference and resale value.
  • Only use manufacturer-recommended or high-quality oil; the transmission is the heart of this bike's long-term health.

With these steps and MotoSport.com's trusted parts and tools, you can keep your 2019 GAS GAS EC 300 in top racing shape after every ride.

Related Shopping Categories

Shop Motor Oil for a 2019 GAS GAS EC 300 Dirt Bike.

Shop Oil Filters for a 2019 GAS GAS EC 300 Dirt Bike.

Shop Oil Drain Pans for a 2019 GAS GAS EC 300 Dirt Bike.

Shop Tools for a 2019 GAS GAS EC 300 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2019 GAS GAS EC 300 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.