How to Change the Oil in a 2025 Kawasaki KLX110L

Shop parts for a 2025 Kawasaki KLX110L Dirt Bike.

Keeping your 2025 Kawasaki KLX110L running strong starts with regular oil changes. Whether you’re a seasoned mechanic or a dirt bike rookie, this step-by-step guide from MotoSport.com will walk you through the process. We’ll highlight all the required tools, outline the process in detail, and call out everything specific 2025 KLX110L owners need to know to get the job done right.

Tools and Supplies Needed

  • 3/8” ratchet with extension
  • 8mm, 12mm, 17mm sockets
  • Torque wrench (for proper tightness)
  • Oil drain pan
  • Oil fill funnel
  • New engine oil: 10W-40 full synthetic motorcycle oil (1.0 to 1.1 quarts)
  • Oil filter (if replacing) — for 2025 models, check if you have a replaceable filter or just a screen
  • 10mm drain plug crush washer (recommended replacement each oil change)
  • Clean rags
  • Safety gloves

Special Call-outs for 2025 KLX110L Owners

  • The 2025 KLX110L uses a 17mm drain bolt instead of more common sizes on other bikes.
  • Kawasaki recommends 10W-40 full synthetic oil, and the capacity is just under 1.1 quarts (or 1 liter if you don’t change the filter/screen).
  • There is a sight glass on the right crankcase for oil level verification.
  • No replaceable oil filter; the KLX110L uses an internal screen that should be inspected and cleaned if possible each oil change.
  • Always replace the drain plug crush washer to prevent leaks.
  • Double-check that the sealing surfaces (cap and drain plug area) are clean before reassembly.

Step-by-Step Oil Change Instructions

  1. Prepare Your Workspace
    Park your KLX110L upright on a level surface. If you’ve just ridden, let the bike cool a few minutes to avoid burns. Gather all the listed tools and supplies.
  2. Warm Up the Engine (Optional but Recommended)
    Start the engine and let it idle for 2-3 minutes. This warms the oil, helping it drain out more completely, carrying dirt and contaminants with it.
    CAUTION: Exhaust parts will get hot. Be careful during the next steps.
  3. Remove the Skid Plate
    Using the 8mm socket, remove the two bolts on each side of the plate and then the two 12mm bolts behind it. Take the skid plate off and set aside.
    Note: Some models require all four bolts removed before the plate will come free.
  4. Open the Oil Filler Cap
    Loosen and remove the oil fill cap (found on the right side crankcase). This prevents vacuum and allows oil to drain efficiently.
  5. Drain the Oil
    Place your oil pan under the drain bolt (bottom of the engine near the left side). Using the 17mm socket, loosen and remove the drain bolt.
    Allow oil to drain completely–wait a few minutes for a thorough job.
    Remove and inspect the drain plug for metal shavings (which can indicate internal wear–if present in significant amount, consult a mechanic).
  6. Inspect/Clean the Oil Screen
    The KLX110L does not have a traditional oil filter; instead, inspect the small metal oil screen as part of your maintenance. Clean with solvent and allow to dry before reinstalling.
  7. Replace the Crush Washer
    Install a new 10mm crush washer onto the drain plug.
  8. Reinstall the Drain Bolt
    Hand-thread the drain bolt, then torque to Kawasaki’s spec using your torque wrench (typically 11 ft-lbs; always check your owner’s manual for confirmation).
  9. Add New Oil
    With your funnel in the filler hole, pour in 1.0L (if not cleaning the screen) up to 1.1L (if you did) of 10W-40 full-synthetic motorcycle oil. Pour slowly to avoid overfilling.
    Wait several minutes to let oil settle, then check the sight glass. It should be between the upper and lower lines.
  10. Reinstall the Fill Cap and Skid Plate
    Clean the fill cap’s threads and sealing surface. Reinstall and hand-tighten. Then refit the skid plate using the previously removed bolts; torque to spec.
  11. Check Oil Level (Final Verification)
    Start the bike and let it idle for about 3 minutes. Turn it off and wait another 3 minutes for oil to settle. With the bike standing upright, check the sight glass again. Top off as needed: oil should be between the upper and lower lines.
    DO NOT overfill. Overfilled oil can cause power loss or leaks.
  12. Dispose of Used Oil Properly
    Take your used oil and any contaminated materials to a local recycling center or auto parts store that accepts waste oil.

Tips and Safety Reminders

  • Always use motorcycle-specific, JASO MA-rated oils. Never use automotive oil in your dirt bike engine.
  • Inspect the drained oil for metallic particles or unusual color and smell–signs of engine issues.
  • Keep records of your maintenance, including oil brand, type, amount, and date for warranty and resell value.
  • Order a KLX110L-specific Oil Change Kit for convenience; kits often include correct oil, washer, and a disposable funnel.

Why Regular Oil Changes Matter for Your KLX110L

Fresh oil ensures your KLX110L’s engine is lubricated, cool, and clean. Dirty oil loses its ability to protect high-speed, high-temperature parts. Stay on schedule to avoid premature wear or failure—especially on a high-revving youth performance bike like the 2025 KLX110L.

For more proprietary guides and all your dirt bike maintenance parts, trust MotoSport.com to keep you riding. Happy trails.

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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.