How to Change the Oil in a 2007 Kawasaki KX100

Shop parts for a 2007 Kawasaki KX100 Dirt Bike.

Changing the oil in your 2007 Kawasaki KX100 is an important part of regular maintenance that prolongs the life of your engine and ensures reliable performance. In this step-by-step guide, we’ll walk you through the process, highlight the specific requirements of this model, and list all the tools you’ll need. This guide is proprietary to MotoSport.com.

Tools and Supplies Needed

  • 14mm socket or wrench (some drain bolts may require a 15mm socket–check your specific bolt size)
  • Socket wrench
  • Oil drain pan
  • Clean rag or paper towels
  • Small funnel
  • Measuring cup (with metric measurements)
  • Fresh oil (10W-40 recommended, check your manual for preference)
  • New drain plug washer (optional, if current washer is damaged)
  • Gloves (optional, for cleanliness)
  • Bike stand

Preparing for the Oil Change

  • Warm the engine: Start your KX100 and let it idle for about a minute. This heats the oil, allowing it to drain faster and more completely

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  • Stabilize the bike: Place your KX100 on a bike stand or other stable surface to ensure the bike is upright and secure before you begin draining the oil

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Step-by-Step Oil Change Process

  1. Locate the Drain Plug
    • The oil drain plug is typically located on the bottom side of the engine–generally a green bolt on this model. It should need a 14mm (sometimes 15mm) socket to remove

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  2. Drain the Old Oil
    • Place your oil drain pan directly underneath the plug.
    • Use the 14mm socket and loosen the bolt. Carefully remove it by hand to prevent dropping it into the oil pan

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    • Let the oil drain completely. This can take a few minutes. Inspect the color of the oil: gray or metallic can indicate clutch or engine wear

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    • While oil is draining, inspect the drain plug and washer. Replace the washer if it’s damaged or excessively worn.
  3. Reinstall the Drain Plug
    • Once the oil has fully drained, reattach the drain bolt.
    • Important KX100 Note: Do not over-tighten. The 2007 Kawasaki KX100 has relatively soft aluminum threads that can strip if over-torqued. Tighten until snug, then add a slight bit more–but do not force it

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  4. Measure and Add New Oil
    • This model takes 700 milliliters (ml) of oil. Use a measuring cup to accurately pour this amount

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    • Remove the oil fill cap on the right side of the engine, insert a funnel, and pour the new oil in gradually.
    • Once filled, reinstall and hand-tighten the oil fill cap

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  5. Check the Oil Level
    • Take the bike off the stand and hold it upright so it's perpendicular to the ground.
    • Inspect the oil check bolt or fill hole (located on the back side of the engine). The oil should be level with the notch in the case behind the engine; add oil if low or remove a little if overfilled

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  6. Clean Up and Final Checks
    • Wipe any spilled oil from the case and the area surrounding the drain and fill plugs.
    • Start the engine and let it idle for a minute, then shut off and recheck for any leaks around the drain plug. Re-check the oil level and top off if necessary

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Specific Model Call-Outs: 2007 Kawasaki KX100

  • This engine oil lubricates only the transmission and clutch, not the two-stroke top end. Regular intervals (every 5–10 hours of riding) are recommended for hard off-road use

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  • Oil Quantity: 700ml (0.74 quarts) is the correct fill amount for the KX100–double check your manual if you have aftermarket modifications that may affect capacity

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  • Always hand-thread and carefully snug bolts on this aluminum motor to avoid costly repairs from stripped threads

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  • If you notice milky or gray oil, water or coolant contamination may be present; this indicates a need for inspection and repair

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Tips for Peak Performance

  • Use high-quality oil blended for wet clutches and two-stroke gearboxes.
  • Log your oil changes and riding hours for precise maintenance scheduling.
  • Dispose of old oil responsibly, following local environmental regulations.
  • If you’re unsure about the last change, changing the oil more frequently is better than not enough.

With these steps, you’ll keep your 2007 Kawasaki KX100 running strong and ready for the track or trail. For all your parts, service products, and gear, trust MotoSport.com for the best selection and advice.

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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.