How to Change the Oil in a 2023 GAS GAS MC 85

Shop parts for a 2023 GAS GAS MC 85 Dirt Bike.

Changing the oil on your 2023 GAS GAS MC 85 is a simple yet essential maintenance task that keeps your dirt bike performing at its best. This guide from MotoSport.com covers the entire process, from the tools you need to specific callouts that apply to the MC 85 platform. Follow these steps, and you’ll be ready to ride with confidence.

Tools and Supplies Needed

  • 8mm T-handle or socket wrench (for the drain plug)
  • Oil catch pan
  • New crush washer (recommended for proper sealing)
  • Parts cleaner/contact cleaner for cleaning bolt and area
  • Funnel or a 3D-printed threaded funnel (optional, but helps prevent spills)
  • Fresh gear/transmission oil: Motul Trans Oil, Maxima MTL, or equivalent
  • Torque wrench (to set the proper torque on the drain bolt)
  • Disposable gloves (optional for cleanliness)
  • Rags or shop towels for cleanup

Oil Specification for GAS GAS MC 85

  • Oil Type: High quality gear/transmission oil (e.g., Motul Trans Oil, Maxima MTL)
  • Oil Capacity: 500cc (0.5 liters)
  • Drain Bolt Torque: 15 Nm (Newton meters)

Step-by-Step Guide

  1. Warm up your engine.
    • Start the bike and let it idle for a few minutes to thin the oil, making it easier to drain.
  2. Shut off the engine and stabilize the bike.
    • Place your bike on a stand so it’s upright and secure.
  3. Access the drain plug.
    • If the brake pedal blocks the drain plug, press it down and brace it with a screwdriver or similar tool. This will move the pedal out of the way and give you access to the bolt. This handy trick saves time and frustration, especially on the 2023 MC 85 and similar KTM/Husqvarna 85s.
  4. Remove the drain plug and washer.
    • Position the oil catch pan under the drain bolt.
    • Use the 8mm wrench to loosen and remove the drain plug.
    • Let the oil fully drain. It holds about 500cc (0.5 liters), so it will drain quickly.
    • Carefully inspect the magnetic drain plug for any metal debris–some small shavings are normal, especially on a fresh engine. Clean off any debris before reinstalling.
    • Replace the crush washer if needed, as it ensures a proper seal and prevents leaks.
  5. Clean the drain area.
    • Spray a little contact/parts cleaner around the hole and drain plug to remove any old oil or dirt for a good seal.
  6. Reinstall and torque the drain plug.
    • Thread the drain plug back by hand to avoid cross-threading, then use your wrench to torque it to 15 Nm. Do not overtighten.
  7. Fill with new oil.
    • Remove the oil fill cap.
    • Use a funnel or specialty threaded funnel to avoid spills and messes.
    • Pour in 500cc (0.5 liters) of fresh gear oil.
    • Screw the oil fill cap back on firmly.
  8. Check oil level (if desired).
    • The 2023 MC 85 uses a measured fill of 500cc, ensuring the correct amount. For peace of mind, you can check the level if your model has a sight glass or inspection bolt.
  9. Clean up and dispose of old oil properly.
    • Wipe down any spilled oil and dispose of the used oil at a recycle center or auto shop that accepts used motor oil.
  10. Start your engine and check for leaks.
    • Let the engine idle for a minute, then visually check the drain plug and fill cap for any leaks and retorque if necessary.

Model-Specific Callouts for the 2023 GAS GAS MC 85

  • 500cc (0.5L) gear oil capacity: Exact fill is important; too much or too little affects clutch and transmission operation.
  • Brake pedal location: The pedal position can block the drain plug; using the brake pedal press and secure hack makes oil changes easier on this model.
  • Magnetic drain plug: Expect some metal shavings, especially in newer bikes. Clean the magnet thoroughly.
  • Crush washer: Always replace the washer to avoid leaks after each change.
  • Drain bolt torque: The drain bolt should be torqued to 15 Nm for a proper seal without risk of stripping the threads.
  • No internal oil filter: The MC 85 does not have an internal oil filter, so regular oil changes are the best way to protect your gearbox.

Conclusion

Changing the oil on your 2023 GAS GAS MC 85 is straightforward with the right tools and techniques. Always remember to use the proper oil and fill amount, check your drain plug and washer, and keep the work area clean. Perform this service regularly for a long-lasting and trouble-free riding experience.

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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.