How to Change the Oil in a 2024 GAS GAS EX 300 – MotoSport.com Proprietary Guide
Shop parts for a 2024 GAS GAS EX 300 Dirt Bike.
Changing the oil in your 2024 GAS GAS EX 300 is a crucial maintenance task to keep your dirt bike running at peak performance. Although two-strokes are known for lighter maintenance duties compared to four-strokes, a regular transmission oil change ensures long gearbox life and crisp shifting. This guide is proprietary to MotoSport.com and provides step-by-step instructions along with essential callouts and detailed tool lists specific to this model and year.
Tools & Supplies Needed
- 6mm Allen socket or Allen wrench (for drain and fill plugs)
- Ratchet with extension (optional, but recommended for better reach)
- Torque wrench (for precise reinstallation of the drain bolt)
- Drain pan
- Funnel (preferably with a narrow tip for easier filling)
- Clean rags
- 900ml of quality two-stroke transmission or gear oil (refer to owner's manual for recommendations)
- Parts cleaner or mild degreaser (optional, for cleaning residue)
- Gloves (optional for cleanliness and safety)
Important Model-Specific Call-Outs for the 2024 GAS GAS EX 300
- Oil capacity: 900ml (milliliters) of transmission oil—do not overfill.
- No oil filter: The two-stroke EX 300 does not use a replaceable oil filter; instead, it has a screen or strainer on the drain bolt for catching debris.
- Filling difficulty: The oil fill plug is small and located awkwardly, making it challenging to refill without a proper funnel.
- Drain plug location: The drain bolt is on the bottom of the case. If your bike has a skid plate, make sure there's an access hole. If not, you may need to remove the plate for access.
- Always replace or inspect the crush washer on the drain bolt to prevent leaks.
Step-by-Step Oil Change Procedure
-
Warm Up the Engine (Optional)
Start and let the engine idle for 2-3 minutes. Warming thins the oil for a more complete drain. Shut off and allow the bike to cool until it's safe to handle. -
Stabilize the Bike
Place the motorcycle on a center stand or a secure bike stand. Make sure it's level for accurate draining and filling. -
Remove the Skid Plate (If Needed)
If your EX 300 has a skid plate without a drain hole, use an Allen wrench to remove it and access the drain bolt easily.
Tip: Some aftermarket plates have access holes. Check before removing. -
Locate the Drain Plug and Place Drain Pan
Find the drain bolt on the engine case bottom (6mm Allen). Position the drain pan directly underneath to avoid mess.
Tip: Keep rags handy for drips. -
Remove the Drain Plug
Carefully loosen the plug with your Allen socket, then finish by hand.
Inspect the plug and the attached strainer for debris or metal particles. Clean thoroughly before reinstallation.
Caution: Oil will flow quickly. Be prepared with your drain pan. -
Allow Oil to Drain Completely
Let all the oil drain—this can take several minutes. For maximum evacuation, gently tilt the bike side-to-side.
Pro tip: As seen in multiple service videos, gently turning the engine over with the kill switch held can help expel remaining oil, but only do this if comfortable and experienced with engine maintenance. -
Reinstall and Torque the Drain Plug
Replace the clean drain plug (and crush washer if necessary). Start threading by hand to prevent cross-threading.
Torque to spec (refer to your service manual, typically around 10-15 Nm for most two-strokes, but always verify for your exact year). -
Remove the Oil Fill Plug
The fill plug is located on the side of the engine, accessed with a 6mm Allen. Remove it and set aside. Prepare your funnel. -
Refill Transmission Oil
Using your funnel, slowly pour in 900ml of recommended gear/transmission oil.
Tip: Add in two stages (e.g., 500ml then 400ml) to avoid spillage. -
Check Oil Level Mark
Some models have an oil level window or dipstick. Most GAS GAS EX 300s rely on accurate measuring via a graduated container since there's minimal headroom for overfilling. -
Replace the Fill Plug
Tighten the fill plug securely with your Allen wrench. Do not overtighten to avoid stripping threads. -
Clean Up and Inspect for Leaks
Wipe up any oil drips and remove the drain pan. Run the engine briefly, then inspect for leaks around the fill and drain plug. -
Replace Skid Plate (If Removed)
Reinstall and tighten securely.
Troubleshooting & Tips
- If the drain plug or fill plug is stuck, use penetration oil and tapping—avoid excessive force to prevent rounding or damaging the case.
- Do not overfill: Too much oil can cause gearbox drag or seal leaks. Carefully measure and pour.
- Dispose of old oil properly—never pour used oil down a drain or onto the ground.
- If you see excessive metal shavings on the drain plug magnet, inspect for potential transmission issues.
Wrapping Up
Oil changes on the 2024 GAS GAS EX 300 are straightforward with the right tools and preparation. Keep your 2-stroke running strong by performing regular transmission oil changes, and always use factory-recommended fluids and torque specs specific to your bike.
MotoSport.com has the tools, oil, and OEM parts you need for every step—ride safe and maintain like a pro.
Related Shopping Categories
Shop Motor Oil for a 2024 GAS GAS EX 300 Dirt Bike.
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Shop Tools for a 2024 GAS GAS EX 300 Dirt Bike.
Shop Oil Fillers and Drain Plugs for a 2024 GAS GAS EX 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.