How to Change the Oil in a 2018 Kawasaki KX85

Shop parts for a 2018 Kawasaki KX85 Dirt Bike.

Regular oil changes are crucial for your 2018 Kawasaki KX85's performance and longevity. This guide will walk you through the process step-by-step, showing you the tools you'll need, specific tips for this model, and how to ensure a smooth and effective oil change. All information is proprietary to MotoSport.com.

Tools & Supplies Needed

  • 14mm socket and ratchet
  • Oil drain pan or container
  • Measuring cup (with metric measurements)
  • Funnel
  • Clean rags
  • Replacement gear/transmission oil (10W-40 recommended)
  • Torque wrench (recommendation: 11 ft-lbs)
  • Gloves (optional, for cleaner work)

Preparation

  • Warm up the bike for about one minute to allow the oil to drain faster and more completely. This thins out the oil, making it easier to remove old contaminants.
  • Ensure you are working on a level surface, and place the bike on a stand for easier access and stability.
  • Gather all tools and have your new oil ready.

Step-by-Step Oil Change Instructions

  1. Remove the Drain Plug
    • Use the 14mm socket to loosen and remove the oil drain plug, located underneath the engine.
    • Allow all the old oil to drain fully into your pan.
    • Clean any dirt or residue from around the drain area to prevent contamination when reinstalling the plug.
  2. Inspect and Reinstall the Drain Plug
    • Clean the plug and inspect the washer for wear. Replace if necessary.
    • Reinstall the drain bolt by hand to avoid cross-threading. Carefully snug the green bolt—do not overtighten, as this could strip the threads.
    • If possible, use your torque wrench to tighten the plug to 11 ft-lbs as recommended.
  3. Add Fresh Oil
    • Your 2018 KX85 requires 700 milliliters of oil. Use a measuring cup for accuracy.
    • Using a funnel, carefully pour the oil into the oil filler hole.
    • Replace the filler cap securely after topping up.
  4. Check Oil Level
    • Remove the bike from the stand and ensure it is upright and perpendicular to the ground.
    • Look at the oil check hole located behind the right side of the engine.
    • The oil should sit level with the small notch in the case when the bike is upright.
    • If the level is low, carefully add a little more oil, checking frequently to avoid overfilling.
  5. Cleaning Up
    • Clean any spilled oil off the engine and frame with a rag.
    • Dispose of the old oil properly at a recycling center.

Model-Specific Tips for the 2018 Kawasaki KX85

  • This bike uses oil for the transmission only. The engine/crankshaft is lubricated by oil mixed into your premix fuel. Be sure to use gear or transmission oil (10W-40 is common), not standard four-stroke engine oil.
  • The required volume–700 milliliters–should be precisely measured. Overfilling or underfilling will affect shifting and clutch performance.
  • Do not overtighten the green drain bolt, as the aluminum threads in the case are easy to strip.
  • The recommended oil change interval is roughly every 3–5 hours of riding for optimal clutch and transmission health.
  • For best results, always inspect drained oil for residue or metal particles, which may indicate unusual wear.

Post-Oil Change Checklist

  • Double-check both drain and fill caps are tight, but not overtightened.
  • Wipe down any spills and clean the bike's underside for easier future maintenance.
  • Start the bike and let it idle for a minute. Check for any leaks from the drain or fill area.
  • Re-check oil level after a short ride to confirm proper fill amount.

Final Tips

  • Keep a maintenance log of each oil change with date and engine hours.
  • Always use high-quality oil made for two-stroke transmissions.
  • Don't forget to safely recycle your used oil.

If you need more supplies, OEM parts, or want to upgrade your maintenance toolbox, visit MotoSport.com for everything you need to keep your KX85 running strong.

Related Shopping Categories

Shop Motor Oil for a 2018 Kawasaki KX85 Dirt Bike.

Shop Oil Filters for a 2018 Kawasaki KX85 Dirt Bike.

Shop Oil Drain Pans for a 2018 Kawasaki KX85 Dirt Bike.

Shop Tools for a 2018 Kawasaki KX85 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2018 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.