How to Change the Oil in a 2017 Kawasaki KX85

Shop parts for a 2017 Kawasaki KX85 Dirt Bike.

Routine oil changes are essential for extending the life of your 2017 Kawasaki KX85. This two-stroke dirt bike uses transmission/gear oil—unlike four-strokes, which need engine oil—so keeping it fresh prevents gear wear and clutch issues. This step-by-step guide provides everything you need, plus model-specific tips, to ensure you get the job done right for MotoSport.com.

Tools and Supplies Needed

  • 14mm socket (for drain plug)
  • Socket wrench (or ratchet)
  • Drain pan
  • Clean rag or shop towels
  • Transmission/gear oil (10W-40 recommended; 700ml required)
  • Funnel or measuring cup
  • (Optional) Torque wrench (to torque drain bolt to 11 ft-lbs)
  • (Optional) Gloves for hand protection

Preparation and Safety

  • Work in a well-ventilated area, away from kids and pets.
  • Put your bike on a level stand so it's upright and steady.
  • Start and idle the bike for one minute–this helps the old oil drain faster by thinning it out.
  • Turn off the bike and allow the engine and exhaust to cool for a minute to avoid burns.

Step-by-Step Oil Change Instructions

  1. Locate the Drain Bolt
    – The oil drain bolt is on the bottom-left side of the engine, beneath the motor casing. – Place your drain pan directly underneath.
  2. Remove the Drain Bolt
    – With the 14mm socket and wrench, loosen and remove the drain plug. – Allow all the oil to drain completely. Tilting your bike gently side to side helps remove every drop. – Inspect the drain bolt and washer for wear or metal shavings indicating possible transmission damage.
  3. Reinstall the Drain Bolt
    – Clean the drain bolt and sealing area with a rag. – Thread in the drain bolt by hand first, then snug with the wrench. Avoid overtightening to prevent stripping aluminum threads—torque to 11 ft-lbs if possible.
  4. Add New Transmission Oil
    – Measure 700 milliliters of 10W-40 transmission oil with a measuring cup. – Remove the oil fill cap (on the right side of the engine) and insert a funnel. – Pour the new oil slowly to avoid spills. – Replace the fill cap securely.
  5. Check the Oil Level
    – Stand the bike straight up. The KX85 has a sight notch in the clutch cover case near the fill hole; the oil should be level with this notch. – Alternatively, some late models have a sight glass: the oil should fill approximately three-quarters of the glass.
  6. Clean Up
    – Wipe away any spilled oil. – Properly dispose of the used oil at a recycling center or auto parts store.
  7. Warm Up and Test
    – Start the engine and let it idle for a few minutes. – Check for leaks at the drain bolt and around the fill cap. – Shut off the bike, let it settle, and recheck the level if using the sight glass or notch.

Kawasaki KX85 (2017) Model-Specific Notes

  • The 2017 KX85 uses transmission oil only—engine lubrication in the cylinder is via premixed gas.
  • Oil change interval: After every 3-5 hours of riding, or after particularly muddy/rainy rides.
  • The fill capacity is 0.7L (700ml). Overfilling can cause clutch drag; underfilling risks gear damage.
  • The drain plug is easily stripped—hand-thread before tightening and always check for tightness but do not overtorque.
  • Check for excessive metal flakes in old oil; this indicates abnormal gear wear. A few small flecks are normal, but “glittery” oil is not.
  • Use regular gear oil changes to extend clutch and gear life—this is the most important regular maintenance for your KX85 aside from air filter care.

Final Tips

  • Avoid using automotive engine oils; use motorcycle-specific 10W-40 transmission oil for best clutch and gear performance.
  • Keep a log of oil changes and note any odd smells, textures, or metal presence for troubleshooting.
  • If you’re unsure about the oil type, consult your owner’s manual or a certified Kawasaki technician.

Changing the oil in your 2017 Kawasaki KX85 is straightforward, takes only 15 minutes, and keeps your bike running in top form for every ride. For top-quality oils and the best OEM tools, trust MotoSport.com—your ride’s next oil change starts here.

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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.