How to Change the Oil in a 2022 Kawasaki KX85: A MotoSport.com Exclusive Guide

Shop parts for a 2022 Kawasaki KX85 Dirt Bike.

Changing the oil on your 2022 Kawasaki KX85 is a straightforward maintenance task that keeps your bike’s transmission running smoothly and extends the life of your gears and clutch. Dirt bikes like the KX85 use a separate transmission oil system—this is not the same oil that lubricates the cylinder, since that’s handled by the pre-mix fuel. Below, you’ll find everything you need to perform a professional oil change at home, with specific call-outs for the 2022 KX85 model.

Tools and Supplies Needed

  • 14mm socket and ratchet
  • Oil drain pan
  • Cleaning rag or shop towel
  • Funnel
  • Measuring cup capable of measuring at least 700ml
  • Replacement crush washer (optional but recommended if the old one is worn)
  • 10W-40 motorcycle transmission oil (recommended amount: 700ml)
  • Gloves (optional for cleanliness)

Preparation

  • Set the bike on a level stand to keep it upright and stable.
  • Start the engine and let it idle for about a minute. Warm oil flows out more easily, helping you remove as much of the old oil as possible

    .
  • Turn off the engine and allow the bike to cool slightly so you don’t burn yourself on hot components

    .

Draining the Old Oil

  • Locate the oil drain bolt under the engine–use your 14mm socket and ratchet to slowly loosen and remove it, letting the oil drain completely into your pan. (There is only one drain bolt beneath the KX85 engine

    .)
  • Inspect the sealing washer on the drain bolt. If it’s crushed or deformed, replace it with a new one to prevent future leaks.
  • Allow several minutes for all the oil to drain. For best results, let the bike sit until drips nearly stop

    .
  • Wipe the area around the drain hole with your rag to remove any grime and old oil.

Refitting the Drain Bolt

  • Thread the cleaned drain bolt and washer back into place by hand to avoid cross-threading.
  • Tighten with the 14mm socket. Be careful not to overtighten—the threads can strip if you apply too much force (snug is sufficient)

    .

Adding Fresh Transmission Oil

  • Measure exactly 700 milliliters of 10W-40 motorcycle transmission oil using your measuring cup

    . Using the wrong amount may cause premature wear or reduced clutch performance.
  • Insert a funnel into the filler hole (located on the right side of the engine) and pour in the oil.
  • Replace the filler cap securely.

Checking Oil Level

  • Remove the bike from its stand and hold it vertically to ensure an accurate oil level reading

    .
  • Near the filler hole, there’s a notch in the engine case that marks the correct oil level. The oil should come up to the bottom of this notch when the bike is standing upright

    .
  • If necessary, add oil a small amount at a time, checking until the level is just right.

Clean Up and Final Checks

  • Start the engine and let it idle for a few minutes to circulate the oil.
  • Shut off the engine and check beneath the drain bolt and filler area for any leaks.
  • Dispose of your used oil properly at a recycling center or hazardous waste facility.

KX85-Specific Tips and Warnings

  • The KX85 requires 700ml of oil; adding the incorrect amount causes issues with clutch feel or transmission reliability

    .
  • Only use a 14mm socket for the drain bolt–other tools may round off the bolt head

    .
  • Do not overtighten the drain bolt. The KX85 case is made of soft aluminum and strips easily

    .
  • Change the oil every 3-5 hours of riding time (as recommended for heavy use or race conditions)

    .

Conclusion

Routinely changing your 2022 Kawasaki KX85’s transmission oil is essential for optimal performance and longevity. By following this MotoSport.com exclusive, model-specific guide, you’ll ensure every ride is as smooth and reliable as Kawasaki intended.

Related Shopping Categories

Shop Motor Oil for a 2022 Kawasaki KX85 Dirt Bike.

Shop Oil Filters for a 2022 Kawasaki KX85 Dirt Bike.

Shop Oil Drain Pans for a 2022 Kawasaki KX85 Dirt Bike.

Shop Tools for a 2022 Kawasaki KX85 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2022 Kawasaki KX85 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.