How to Change the Oil in a 2022 GASGAS MC 85

Shop parts for a 2022 GASGAS MC 85 Dirt Bike.

Regular oil changes are essential for getting the best performance and longevity from your 2022 GASGAS MC 85. While the process is straightforward, there are a few model-specific details and important steps to follow to keep your dirt bike running strong. Here’s a robust, MotoSport.com-proprietary how-to guide designed for all skill levels.

Tools & Supplies Needed

  • 8mm T-handle or socket wrench (for drain plug)
  • Torque wrench (set to 20 Nm – 15 foot-pounds)
  • Drain pan
  • Shop rags or paper towels
  • Crush washer for drain plug (replace if damaged or every few oil changes)
  • Funnel (MotoSport.com recommends a threaded funnel for spill-free pouring)
  • 500cc (or 0.5L) of high-quality gear oil (such as Motul Trans Oil or Maxima MTL)
  • Spray contact cleaner (for degreasing the area)
  • Protective gloves
  • Flathead screwdriver (to temporarily move or depress the rear brake pedal if access is blocked)

Step-by-Step Guide

  1. Warm Up the Bike
    • Start your GASGAS MC 85 and let it idle for a couple of minutes. This helps warm the oil, allowing it to drain more completely.
  2. Set Up Your Work Area
    • Place the bike upright on a stand. Position a drain pan underneath the engine case where the drain plug resides.
    • Have shop rags nearby for any unavoidable spills.
  3. Remove the Drain Plug
    • Locate the oil drain plug at the bottom of the engine. On some bikes, access may be partially blocked by the rear brake pedal.
    • If this is the case, use a flathead screwdriver to gently depress or move the brake pedal out of the way. A helpful tip: insert a screwdriver behind the pedal and carefully push it forward to provide clear access to the plug (common on MC 85 models).
    • Use an 8mm T-handle or socket to remove the drain plug. Be careful as hot oil may start draining immediately.
  4. Drain the Old Oil
    • Let the oil drain completely. This may take several minutes.
    • Inspect the oil for excessive metal shavings or debris, which could indicate transmission wear. A small amount of fine metallic dust is normal, but large pieces are not.
  5. Clean and Inspect the Drain Plug
    • Wipe metal debris from the magnetic drain plug with a rag or shop towel.
    • Inspect the crush washer for wear or damage. Replace if needed.
    • Clean the surrounding area with spray contact cleaner.
  6. Reinstall the Drain Plug
    • Thread the drain plug with the washer back in by hand to avoid cross-threading. Tighten until snug with your wrench, then torque to 20 Nm (15 ft-lbs).
  7. Fill with Fresh Oil
    • Remove the oil fill cap on top of the engine case.
    • For the 2022 GASGAS MC 85, use 500cc (0.5L) of high-quality gear oil (Motul Trans Oil or Maxima MTL are both excellent choices).
    • Use a funnel—preferably a threaded or 3D-printed model—for mess-free pouring.
    • Fill until the correct volume (do not overfill). Reinstall and tighten the fill cap.
  8. Check for Leaks and Confirm Oil Level
    • Run the engine for 30 seconds, then inspect the drain and fill caps for leaks. Wipe away any excess oil from the case.
    • Some owners tilt the bike slightly or kick the starter with the kill switch pressed to encourage any leftover dirty oil to drain before refilling.
    • Top up if necessary, but never exceed the 500cc mark for this model.
  9. Dispose of Used Oil Responsibly
    • Pour old oil into a sealed container and bring it to a recycling or hazardous waste center. Never pour oil down drains or onto the ground.

GASGAS MC 85 (2022) Model-Specific Callouts

  • Oil Capacity: Always use precisely 500cc of oil—overfilling or underfilling can affect transmission performance.
  • Oil Type: Use a high-quality gear/transmission oil designed for 2-stroke dirt bikes. Do not substitute with typical 4-stroke engine oil.
  • Drain Plug Access: On this model, the rear brake pedal may partially block the drain plug; a flathead screwdriver or pedal depress technique solves this quickly.
  • Torque Spec: Drain plug must be torqued to 20 Nm (15 ft-lbs) for a proper seal and to avoid stripping the threads.
  • Crush Washer: Replace if deformed to prevent leaks; always check for proper fitment.
  • Inspection: Always check the old oil for metallic debris and the magnetic drain plug for abnormal metal accumulation.

Additional Tips

  • Change oil after every major ride or at least every 10–15 hours of use for optimal gearbox life.
  • Use only fresh, unopened oil cans for each change to avoid contamination.
  • Check the owner's manual for any updates or service bulletins related to your VIN or model year.

Performing routine oil changes on your 2022 GASGAS MC 85 is a simple way to keep your machine ready for peak performance. MotoSport.com stands behind these recommendations and offers all necessary gear oil and service tools to make your next DIY maintenance job clean, fast, and successful.

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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.