How to Change the Oil in a 2008 GAS GAS EC 250 — MotoSport.com Guide

Shop parts for a 2008 GAS GAS EC 250 Dirt Bike.

Regular oil changes are essential for keeping your 2008 GAS GAS EC 250 running at peak performance and prolonging the life of its engine. Below is a detailed, model-specific, and proprietary MotoSport.com guide on how to change your oil the right way.

Tools and Supplies Needed

  • Quality 2-stroke engine oil (Refer to your owner's manual for specification and capacity – typically 700ml to 800ml for this model)
  • Oil drain pan
  • Socket wrench set (8mm, 13mm are common sizes for drain and fill bolts)
  • Clean rags
  • Rubber gloves
  • New crush washer or O-ring (recommended for every oil change, if equipped)
  • Measuring cup (for accurately filling oil)
  • Flathead screwdriver or Allen key (as needed for filler/drain plugs)
  • Stand that allows access to the drain bolt (Avoid traditional stands that may block access)
  • Parts cleaner (optional, for cleaning drain plug and area)

Preparation & Safety

  • Warm up the engine for 3-5 minutes to help the oil flow out completely.
  • Turn off the engine and secure the bike upright on a stand that does not block the drain bolt; avoid traditional stands that interfere with access to the oil drain location.
  • Wear gloves to protect your hands from hot oil and grime.

Step-by-Step Oil Change Instructions

  • Access the Drain Bolt:
    • Locate the oil drain bolt on the underside of the crankcase. The 2008 EC 250 typically uses an 8mm or 13mm bolt.
  • Drain the Oil:
    • Place your drain pan under the drain bolt. Carefully remove the bolt with your wrench or Allen key.
    • If the bike is on a side stand, gently lean it slightly to the opposite side to ensure complete drainage. This model benefits from a center stand or one that allows the bike to lean for better drainage.
    • Allow oil to fully drain; this may take several minutes.
  • Inspect and Clean:
    • Inspect the oil for metal shavings or excessive debris, as this could indicate internal wear. Some drain bolts may have a magnetic tip – check for metal particles and clean thoroughly.
    • Remove and inspect the crush washer or O-ring from the drain bolt. Replace if damaged or at each oil change for best sealing.
    • Wipe the area around the drain hole with a clean rag.
  • Optional: Flush the Last Drops
    • If desired, lean the bike back slightly or temporarily "bump" the starter with the kill switch in to turn the engine and help remove more old oil, as seen in pro shop procedures.
  • Replace the Drain Bolt:
    • Reinstall the drain bolt with a new washer/O-ring. Hand-tighten and then torque to specification (typically around 14.8 ft-lbs; refer to your owner's manual for exact number).
  • Remove the Filler Cap:
    • Find the oil filler cap, typically located on the right side of the crankcase.
    • Clean around the opening to prevent dirt from entering the engine.
  • Refill the Oil:
    • Using your measuring cup, pour in the recommended quantity of fresh 2-stroke transmission oil – usually ~700ml to 800ml for this model.
    • Pour slowly and pause halfway to allow oil to settle.
  • Replace and Secure Filler Cap:
    • Wipe away any spilled oil and tighten the filler cap securely.
  • Check the Oil Level:
    • Many EC 250 models have a sight glass or level screw. With the bike upright, verify oil hits the recommended mark.
  • Final Inspection:
    • Start the engine and let it idle for 1-2 minutes.
    • Check for leaks around the drain bolt and filler cap. Turn off the engine and confirm oil level once more, topping up if necessary.

Special Call-Outs for 2008 GAS GAS EC 250 Owners

  • The EC 250 is a 2-stroke: The crankcase/transmission oil is separate from engine (combustion) oil. Oil injected or premixed with fuel lubricates the engine, while you are changing the transmission/crankcase oil.
  • Oil Specification: Use high-quality, JASO MA2 compliant 2-stroke transmission oil only. Do not use regular automotive motor oil in 2-stroke transmissions – clutch performance will suffer.
  • Crush washers should be replaced at every change to avoid slow leaks.
  • Check the sight glass or fill/level bolt (on the case side) to confirm proper level before riding. Overfilling can cause clutch drag; underfilling may damage transmission bearings.
  • If your bike is fitted with a magnetic drain plug, always inspect for excessive metal shavings, which could be a sign of bearing or gear issues.
  • Avoid over-tightening drain/filler bolts; cases are cast aluminum and threads can be stripped if excessive force is used.

Pro Tips for Garage Success

  • Dispose of old oil properly – take it to an approved recycling center or auto parts store.
  • Keep a log of your oil changes, including date and oil type, for best maintenance tracking.
  • If unsure, consult your official 2008 GAS GAS EC 250 manual or reach out to the MotoSport.com technical team.

Changing your oil regularly is the most important maintenance task for your dirt bike. Do it right, do it often, and your 2008 GAS GAS EC 250 will give you years of dependable trail and track fun.

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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.