How to Change the Oil in a 2025 GAS GAS MC-E 5

Shop parts for a 2025 GAS GAS MC-E 5 Dirt Bike.

Changing the oil in your 2025 GAS GAS MC-E 5 is critical for engine longevity and performance. Follow this comprehensive, MotoSport.com proprietary guide to safely and effectively perform an oil change, including special pointers unique to your make and model.

Tools and Supplies Needed

  • 1.0 liter Motorex Cross Power 4T 10W/50 full synthetic oil or manufacturer-specified oil
  • OEM Oil Filter
  • Oil drain bolt crush washer
  • Socket wrench set (including appropriately sized socket for drain bolt, typically M12)
  • Oil catch pan
  • Clean rags or shop towels
  • Torque wrench (capable of 14.8 ft-lbf/20 Nm)
  • Funnel (preferably with a threaded or secure fit for no spill)
  • Contact/parts cleaner (for cleaning drain bolt and surrounding area)
  • Needle nose pliers (helpful for removing and installing screen)
  • Latex gloves (optional, for cleanliness)

Step-by-Step Instructions

  1. Warm Up the Engine
    • Run the engine for a few minutes to warm up the oil (do not overheat).
    • This helps the oil to flow more freely for a thorough drain.
  2. Shut Down and Prep
    • Turn off the bike and ensure it's upright on a stand.
    • Allow a few minutes for parts to cool for safety.
  3. Locate the Oil Drain Plug
    • The drain plug is typically at the bottom of the crankcase. Refer to the service manual for the exact location if unclear.
    • If the brake pedal obstructs access (common on small frames), gently move it out of the way for clear access. In some cases, separate the rear pads and push the pedal down for more room .
  4. Drain the Oil
    • Place the oil catch pan directly beneath the drain bolt.
    • Using the socket wrench, carefully loosen the oil drain bolt (M12x1.5 is typical, may vary) .
    • Remove the bolt and crush washer; allow all oil to drain completely.
    • Inspect the old oil for metal debris–tiny flecks are ok, large fragments indicate issues .
  5. Clean and Inspect Components
    • Clean the drain bolt thoroughly with contact cleaner.
    • Replace the crush washer with a new one to prevent leaks .
    • If your model has an oil screen or filter plug, remove and inspect it. Clean any debris from the screen, and check sealing O-rings for flattening or wear; replace if necessary . Apply a thin coat of clean oil to O-rings before reinstalling.
  6. Replace and Torque the Drain Plug
    • Reinstall the drain bolt with a new crush washer.
    • Tighten using a torque wrench to 20 Nm (14.8 ft-lbf) . Do not overtighten, as this can damage threads or cause leaks.
  7. Change the Oil Filter (If Applicable)
    • Remove the oil filter cap and old filter. Clean inside the housing.
    • Install the new OEM oil filter, ensuring the O-ring is seated properly; replace O-ring if it's cracked or flat .
  8. Refill with Fresh Oil
    • Insert the funnel into the fill port.
    • Pour in the specified amount of Motorex Cross Power 4T 10W/50 (1.0 liter unless otherwise instructed by your owner's manual) .
  9. Check Oil Level
    • Start the engine and let it run for a minute, then shut off.
    • Let the oil settle for a few minutes, then check the oil level sight glass or dipstick. Add oil if necessary to reach between the minimum and maximum marks.
  10. Dispose of Used Oil Responsibly
    • Transfer used oil to a sealed container and bring to a recycling center or auto parts shop accepting oil waste.

2025 GAS GAS MC-E 5 Specific Callouts

  • Always confirm oil volume and type with your owner's manual; specs may change year–to–year even for similar models.
  • Use only OEM filters and gaskets for best results and to maintain warranty coverage.
  • Inspect the area around the drain bolt and filter cap for leaks after running the engine post–change.
  • Do not remove the oil pressure bypass spring and ball plug—it is clearly marked in most manuals and not meant for oil changes .
  • If the oil screen is present, ensure proper seating in its groove to avoid bypassing the filter and risking engine damage .

Additional Tips

  • Keep your workspace clean to avoid contaminating the engine.
  • Mark your maintenance log with mileage/hours and date of the oil change.
  • If you encounter resistance threading drain or filter bolts, re–check alignment to avoid cross–threading.

Proper, regular oil changes are the best way to ensure your 2025 GAS GAS MC-E 5 stays reliable and race–ready. Repeat this process according to your owner's manual schedule or after any heavy use. Check back at MotoSport.com for more expert guides and parts to keep your dirt bike running strong.

Related Shopping Categories

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Shop Tools for a 2025 GAS GAS MC-E 5 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2025 GAS GAS MC-E 5 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.