How to Change the Oil in a 2013 Kawasaki KX100

Shop parts for a 2013 Kawasaki KX100 Dirt Bike.

Regular oil changes are essential for maintaining engine health and ensuring the best performance on your 2013 Kawasaki KX100. This guide from MotoSport.com will walk you through the necessary tools, step-by-step instructions, and specific considerations for this unique two-stroke dirt bike model.

Tools and Supplies Needed

  • 14mm socket (for drain plug removal)
  • Socket wrench
  • Drain pan (to catch used oil)
  • Measuring cup (with milliliter markings)
  • Funnel
  • New transmission oil (Recommended: 5W, 700ml total volume)
  • Gloves (recommended for cleanliness and protection)
  • Shop towels or rags (for cleanup)

Step-by-Step Instructions

  1. Warm up the engine:
    • Start and idle the bike for about a minute. This helps the oil drain more quickly and completely by lowering viscosity.
  2. Position the bike:
    • Turn off the engine, place the bike on a center stand or use a sturdy box to keep it vertical and stable.
  3. Locate the drain plug:
    • You'll find a single drain bolt underneath the engine, which requires a 14mm socket.
    • Have your drain pan ready underneath the bolt.
  4. Remove the drain plug:
    • Carefully unscrew the drain plug using your socket wrench.
    • Allow the old oil to drain completely into the pan (wait several minutes for the best results).
    • Inspect the oil for metal filings or a grayish color. If the oil appears metallic or unusually tinted, further inspection may be necessary as this can indicate internal engine wear.
    • Wipe off and inspect the drain plug and crush washer. Replace the washer if damaged.
  5. Reinstall and tighten the drain plug:
    • Thread the plug back in by hand to avoid cross-threading, then tighten it moderately with your socket wrench. Do not over-tighten—the KX100 uses aluminum threads, which are easy to strip.
  6. Measure and add new oil:
    • Use your measuring cup to pour 700ml of new transmission oil of your choice (refer to owner's manual for manufacturer oil spec, but many use high-quality 5W gear oil).
    • Use a funnel to avoid spills and fill through the oil fill cap, located on the clutch side of the engine.
    • Replace and tighten the oil fill cap.
  7. Check oil level:
    • With the bike perpendicular to the ground, locate the sight notch near the oil fill hole, on the backside of the engine case.
    • The oil level should reach the bottom edge of this notch. Adjust if necessary.
  8. Clean up:
    • Wipe up any drips and dispose of the old oil in accordance with local regulations.
  9. Test ride:
    • Start the engine and let it idle for a minute, checking for leaks around the drain plug and fill cap.
    • Enjoy your ride.

Model-Specific Call-Outs for the 2013 Kawasaki KX100

  • Oil Capacity: The KX100 takes 700ml of gear/transmission oil for each change.
  • Thread Care: The aluminum case is prone to stripped threads if the drain bolt is overtightened. Hand-tighten first, then snug gently with the tool.
  • Sight Notch: Unique to the KX100 and its smaller sibling, oil level is verified at a case notch, not via a dipstick or sight glass.
  • Single Drain Bolt: There is only one drain bolt, making identification and service easier.
  • Oil Type: Kawasaki recommends high-quality 2-stroke transmission oil (such as 5W). Always refer to your owner's manual or the recommended service chart for compatibility.
  • Environment: For best results, change oil after rides when the engine and gearbox are warm, ensuring the oil and contaminants flow out more effectively.

Why Change KX100 Oil Regularly?

  • Fresh oil enhances clutch performance and increases gearbox longevity.
  • Dirty or contaminated oil can lead to premature clutch wear and internal damage.
  • A regular maintenance schedule keeps your bike riding at its best and maximizes overall value.

Trust MotoSport.com for all your Kawasaki maintenance and part needs—your destination for pro tips and essential gear.

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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.