How to Change the Oil on a 2004 Kawasaki KLX110

Shop parts for a 2004 Kawasaki KLX110 Dirt Bike.

Keeping your 2004 Kawasaki KLX110's oil fresh is crucial for engine health and performance. Changing the oil is a straightforward maintenance task any owner can master. This detailed guide is proprietary to MotoSport.com and will guide you through every step of the oil change process, call out model-specific notes, and list the required tools and materials.

Tools and Materials Needed

  • 3/8” ratchet and extension
  • 8mm socket
  • 12mm socket
  • 17mm socket
  • Torque wrench (for precise reinstallation – recommended)
  • Drain pan
  • Rags or paper towels
  • Rubber gloves (optional, but keeps your hands clean)
  • New engine oil – up to 1 liter of 10W-40 4-stroke motorcycle oil (check your owner’s manual for specification)
  • New crush washer for the drain bolt (recommended)
  • Oil filter (if replacing, but the KLX110 does not have a traditional spin-on filter. The oil screen can be cleaned every other oil change if desired)
  • Contact cleaner (optional, for cleaning up any oil residue)
  • Funnel (helps avoid spills)

Step-by-Step KLX110 Oil Change Procedure

  • Warm up the engine: Start and let your KLX110 idle for a couple of minutes. This helps suspend contaminants in the oil, making it flow out more completely during draining. Be careful—the exhaust and engine will get hot.
  • Remove the skid plate:
    • Use the 8mm socket to take out the bolts on each side of the skid plate.
    • Switch to the 12mm socket for the two rear skid plate bolts.
    • Take the skid plate off and set aside.
    Kawasaki designed the KLX110’s skid plate to be sturdy. Removing it fully exposes the drain bolt and prevents a mess.
  • Remove the oil fill cap: Loosen or remove the oil fill cap (located at the top of the right engine side cover) to allow oil to drain freely.
  • Drain the oil:
    • Place your drain pan beneath the engine.
    • Using the 17mm socket, carefully loosen and remove the drain bolt at the bottom of the engine.
    • Allow all the oil to drain. Inspect the oil for unusual debris or metal particles; this can indicate engine issues.
    • Inspect and replace the aluminum crush washer on the drain bolt if necessary. A worn washer can cause leaks.
  • Clean and inspect parts: Wipe down the drain bolt, threads, and engine case. If you wish, use contact cleaner to remove oil residue from hard-to-reach places.
  • Reinstall the drain bolt:
    • Thread the drain bolt in by hand to avoid cross-threading, then snug it down.
    • Torque to 17 ft-lbs if using a torque wrench (refer to your manual for the precise spec).
  • Add new oil:
    • Place a funnel in the fill hole. Pour in 0.85–1.0 liters of fresh 10W-40 motorcycle oil (see owner’s manual for exact volume).
    • Replace the oil fill cap and wipe up any drips.
  • Start the engine and check oil level:
    • Start and let the engine idle for 30 seconds, then shut it off.
    • Let the bike sit for a minute, then, holding it upright and level, check the oil level using the sight glass (on the right side crankcase) or dipstick if equipped.
    • Top off oil as needed to bring it to the mid-point between the sight glass marks.
  • Reinstall skid plate: Reattach the skid plate with the original bolts, tightening them snugly. This helps protect your KLX110 on the trail.
  • Cleanup and disposal: Wipe down any spilled oil, clean your tools, and dispose of used oil at a recycling center.

2004 Kawasaki KLX110 Specific Notes

  • The 2004 model does NOT use a replaceable oil filter cartridge. Instead, it features an oil screen which can be removed and rinsed with solvent every other oil change, but is not required for every change.
  • The oil capacity is close to 1 liter (1.06 US qt), but always check the level before finishing—overfilling can damage seals.
  • Use motorcycle-specific oil—automotive oil does not work properly with the KLX110’s wet clutch system.
  • Always install a new crush washer on the drain bolt. Oil leaks are common when this aluminum washer is reused multiple times.
  • Pay attention to the condition of your drain plug threads—never force the plug if it won't start threading easily.
  • If you ride in extreme conditions or race your KLX110, change the oil more frequently than the basic 6 months/50 hour service interval.

Final Tips for a Robust Oil Change

  • Always use high-quality oil from reputable brands.
  • Take your time with the reinstallation of fasteners—stripped bolts are difficult and expensive to repair.
  • Keep a record of oil changes in your maintenance log—this helps with resale value and tracking your bike’s care.

Changing the oil in your 2004 Kawasaki KLX110 is the easiest upgrade you can do for your bike’s longevity. Regular maintenance keeps you riding farther, longer, and with more confidence. For all parts, oil, and tools, trust MotoSport.com—your partner in powersports performance. Ride on.

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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.