How to change the oil in a 2014 GAS GAS EC250 Dirt Bike

How to Change the Oil in a 2014 GAS GAS EC250 – MotoSport.com Guide

Shop parts for a 2014 GAS GAS EC250 Dirt Bike.

Tools and Supplies Needed

Oil drain pan – to catch the old oil
Clean rags – for spills and wipe-down
Metric socket set (including 13mm socket and wrench)
Allen wrench set (8mm commonly used)
Replacement transmission oil – consult the owner's manual for type and capacity
Replacement crush washer for drain plug
Torque wrench – for correct tightening (optional but recommended)
Funnel – for refilling new oil easily
Gloves – to keep your hands clean and safe

Preparation Steps

Warm up the bike for a few minutes to allow the oil to flow more freely.
Ensure the bike is upright and secure on a center stand or lift. Avoid side stands as you may not access the drain bolt easily, and full drainage may not occur.
Turn off the engine and allow the exhaust to cool before you begin to avoid burns.

Draining the Old Oil

Locate the oil drain bolt underneath the engine. On the GAS GAS EC250, it is typically found at the very bottom of the crankcase.
Position your oil drain pan underneath the bolt.
Using the appropriate socket (usually 13mm), carefully loosen and remove the drain plug. Allow all the oil to fully drain – this could take several minutes.
If equipped, remove the oil filler cap (usually on top of the clutch cover) to allow faster draining.
Inspect the drain bolt for metal shavings, which can indicate gearbox wear. Clean the bolt and replace the crush washer if the old one is flattened or damaged.

Cleaning and Inspection

Wipe around the drain area with a clean rag.
If your EC250 has an oil screen or filter (some 2-strokes do, but most use just a screen for the transmission), carefully remove and inspect it for debris or shavings. Clean the screen thoroughly before reinstallation. Check sealing surfaces and O-rings; replace if flattened or damaged.

Reinstall the Drain Plug

Once the oil has completely drained, reinstall the drain plug with a new crush washer.
Tighten the drain bolt to factory torque specifications if you have a torque wrench. For many similar models, it’s approximately 14-15 ft-lb, but always check your service manual for precise values.

Adding New Transmission Oil

Using a funnel, pour in the recommended type and amount of oil through the filler cap. For the 2014 GAS GAS EC250, the typical fill is around 750ml of a high-quality 2-stroke gearbox/transmission oil. Check your manual for any updates.
Replace the filler cap and wipe away any spills.

Checking Oil Level and Final Steps

Many GAS GAS models include a sight glass or a check bolt:
- If you have a sight glass, check that oil sits between the min and max lines while the bike is upright.
- If you have a check bolt (usually on the side of the engine), remove it with the bike upright. Oil should start to trickle out when the level is correct. Allow excess to drain until it stops, then reinstall the bolt.
Start the bike and let it idle for a minute. Shut it off, let it sit, and recheck the oil level to confirm it is correct.
Check carefully for leaks around the drain plug and filler area.
Dispose of the old oil properly at a recycling center.

Model-Specific Call-Outs for 2014 GAS GAS EC250

The 2014 GAS GAS EC250 is a 2-stroke model. The engine oil you change is the transmission oil, not pre-mix; the engine itself gets lubrication from 2-stroke pre-mix or an oil injection system (if equipped).
There is no oil filter (like in a 4-stroke) to replace on the EC250. Simply clean or replace the oil screen if present.
Always check the service manual for the correct oil type. Common recommendations are 75W-80 or 80W-90 motorcycle gear oil.
Do not over-tighten the drain plug; the aluminum case can strip easily.
Changing gearbox oil more frequently can extend clutch and transmission life, especially if you ride hard or in muddy conditions.
Proper stand use: Some stands can block the drain bolt. A bike lift or open-frame stand is best for easy access.

Pro Tips

Inspect for metal shavings each change—this can give an early warning for possible mechanical issues.
Keep a record of oil changes for regular maintenance.
Always use high-quality oil for premium protection of gearbox and clutch components.

For MotoSport.com Customers

Find OEM parts, drain plug washers, and recommended transmission oils for your 2014 GAS GAS EC250 directly at MotoSport.com.
If you’re unsure about oil quantity or specifications, our support team can help you find the exact fit for your model.

Final Reminder

Always refer to your owner’s manual for model-specific maintenance intervals, torque settings, and oil recommendations.
When in doubt, consult a professional technician. Routine oil changes are one of the simplest ways to ensure the long-term reliability of your GAS GAS EC250.

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Shop Oil Fillers and Drain Plugs for a 2014 GAS GAS EC250 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.