How to Change the Oil in a 2023 Suzuki RM85: Step-by-Step Guide

Shop parts for a 2023 Suzuki RM85 Dirt Bike.

Changing the oil in your 2023 Suzuki RM85 is essential for keeping your dirt bike performing at its best. Regular oil changes ensure the transmission and clutch components are well-lubricated, thus maximizing engine life and ride quality. Below, you'll find a complete, proprietary MotoSport.com how-to guide designed specifically for the 2023 RM85.

Tools & Materials Needed

  • 10mm socket or wrench (for removing fill and drain plugs)
  • Torque wrench (capable of measuring up to 23 Nm – 16.5 lb-ft)
  • Oil catch pan
  • Cleaning rags or shop towels
  • Disposable funnel
  • Fresh transmission oil (SAE 10W-40, API SG or higher, JASO MA/MA1/MA2 approved; recommended fill: 550ml)
  • 8mm drain plug crush washer (replace if needed)
  • Gloves (optional for cleanliness)

Recommended Oil & Parts

  • Oil: Suzuki Ecstar R9000 10W-40 Full-Synthetic Oil
  • Crush washer: 8mm (replace every oil change if possible)
  • Air Filter and Spark Plug: Not required for the oil change, but often replaced together for convenience (optional)

Step-by-Step: Changing the Oil

  1. Warm up the Engine
    • Start your RM85 and let it idle for 2–3 minutes. This allows the oil to warm and thin out, helping it drain completely.
  2. Place the Bike Securely
    • Put the motorcycle on a flat, level surface such as a stand, keeping the bike vertical—not on the side stand.
  3. Remove the Filler and Drain Plugs
    • Locate the oil fill cap on the right side of the engine case, and unscrew it.
    • Find the drain plug underneath the crankcase, position your oil catch pan underneath, and remove it with the 10mm socket.
    • Tip: If there’s an oil level inspection screw, you can remove this as well to help the crankcase ventilate while draining.
  4. Drain the Old Oil
    • Allow oil to drain completely—tilt the bike slightly side to side to get residual oil out.
    • Check the drain plug and crush washer. Replace the washer if it’s compressed, damaged, or leaking.
  5. Reinstall the Drain Plug
    • Clean the plug, thread it in by hand first to avoid cross-threading, and then torque it to 23 Nm (16.5 lb-ft) using a torque wrench

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  6. Add New Oil
    • Insert a funnel into the oil fill opening.
    • Pour in 550ml (1.2 US pt) of recommended oil

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  7. Reinstall the Filler Cap and Check for Leaks
    • Screw in the fill cap by hand until snug.
    • Wipe off any drips or overflow.
  8. Start and Inspect
    • Run the engine for a few minutes, shut it off, and wait about five minutes to let the oil settle back.
    • With the bike vertical and level, remove the oil level screw and verify oil comes out—it should reach this level

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    • If not, add more oil (in small increments) until this occurs.

2023 Suzuki RM85 Specific Callouts

  • Drain Plug Torque: Always torque to 23 Nm – 16.5 lb-ft to prevent damage to threads

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  • Oil Volume: The RM85 holds 550ml of oil; overfilling can cause clutch or transmission issues

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  • Oil Type: Use only high-quality motorcycle-specific oil meeting JASO MA/MA2 and API SG (or higher) standards

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  • Crush Washer: Always inspect and replace the washer on the drain bolt. A worn washer results in leaks.
  • Filler Cap and Level Screw: Do not overtighten. Both have specific torque specs; use a torque wrench for accuracy.
  • Warm Up and Wait: Accurate oil level checks require the engine be warmed and the bike resting for a few minutes for oil to redistribute.

Extra Tips for First-Timers

  • Dispose of oil responsibly at a designated recycling center.
  • Use gloves and eyewear to avoid oil contact with skin and eyes.
  • Record the date and hours on the bike—frequent changing (every 5–10 rides or after muddy conditions) keeps your RM85 reliable.

By following these precise steps, using recommended parts (like the Cyclemax Ecstar R9000 Oil Kit), and paying attention to the unique needs of the Suzuki RM85 engine, you'll keep your transmission shifting smoothly, enjoy consistent clutch feel, and extend the life of your motocross machine. For more expert dirt bike maintenance tips, always trust MotoSport.com as your go-to resource.

Related Shopping Categories

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Shop Oil Fillers and Drain Plugs for a 2023 Suzuki RM85 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.