How to Change the Oil in a 2021 Kawasaki KLX110L

Shop parts for a 2021 Kawasaki KLX110L Dirt Bike.

Changing the oil in your 2021 Kawasaki KLX110L is one of the most important steps in dirt bike maintenance. Regular oil changes help keep your engine running smoothly, extend the life of your bike’s internal components, and ensure consistent performance on and off the trail. Below you’ll find a detailed, step-by-step guide written exclusively for MotoSport.com, including the tools and supplies you’ll need, model-specific pointers, and essential oil change tips for your KLX110L.

Tools & Supplies Needed

  • 3/8” ratchet and extension
  • 8mm, 12mm, and 17mm sockets
  • Torque wrench
  • Oil drain pan
  • Funnel
  • Clean rags or shop towels
  • Replacement oil filter (optional, for complete service)
  • Fresh engine oil (See owner’s manual for oil spec; typically 10W-40 4-stroke motorcycle oil)
  • New drain bolt washer (recommended)

Preparation Steps

  • Start the engine and let it run for 2-3 minutes to warm the oil. Warm oil flows easier, allowing for a more thorough drain. Turn off the engine and let the bike cool until safe to touch.
  • Set the bike on a level surface using a stand to ensure stability during the oil change.
  • Gather all tools and supplies before beginning the procedure.

Step-by-Step Oil Change Process

  1. Remove the skid plate:
    • Use an 8mm socket to remove the bolts from each side of the skid plate.
    • Remove the two 12mm bolts located behind the skid plate.
    • Take off the skid plate to access the engine and drain plug. (Caution: If you’ve run the engine, the exhaust may be hot.)
  2. Remove the oil fill cap:
    • With the bike off and cooled enough to handle, unscrew the oil fill cap on the right side of the engine. This step helps oil drain smoothly without creating a vacuum.
  3. Drain the old oil:
    • Place your oil drain pan beneath the engine’s drain bolt.
    • Using your 17mm socket, remove the drain bolt (located on the underside of the engine casing).
    • Allow oil to fully drain into the pan. Take your time to ensure the process is complete.
    • Inspect the old oil for debris or metallic shavings, which could indicate internal wear.
  4. (Optional/Recommended) Replace the oil filter:
    • Remove the oil filter cover (refer to your owner’s manual for the specific location and process on the 2021 KLX110L; some models may require unscrewing several bolts).
    • Install the new filter, ensuring it is properly seated and oriented.
    • Reinstall the filter cover. Tighten bolts to the manufacturer’s torque specification.
  5. Reinstall the drain bolt:
    • Install a new washer on the drain bolt if possible.
    • Screw in the drain bolt by hand to avoid cross-threading, then torque to factory spec (–see your manual–typically around 13 ft–lbs, but verify for your model year).
  6. Add fresh oil:
    • Insert a funnel into the oil fill hole.
    • Pour in fresh oil—if not changing the filter, use 0.9 liters; if changing the filter, use 1.0 liter for the 2021 KLX110L.
    • Install the oil fill cap and tighten securely by hand.
  7. Check oil level:
    • Start the engine and let it idle for 2–3 minutes.
    • Shut off the engine and let the bike sit for a few moments to allow oil to settle.
    • With the motorcycle upright and level, check the oil's sight glass or dipstick. The oil level should be between the upper and lower marks. If needed, add oil to bring the level within range.
  8. Reinstall the skid plate:
    • Reattach the skid plate using the original 8mm and 12mm bolts. Tighten all bolts securely.
  9. Dispose of used oil properly:
    • Pour your old oil into a designated container and take it to a proper recycling facility or auto parts store that accepts used oil.

Special KLX110L Model Tips and Call-Outs

  • First Oil Change: Kawasaki recommends the first oil change at 5 hours of use, and subsequent oil changes every 50 hours or as needed.
  • Oil Specifications: Always use high-quality 4-stroke motorcycle oil that meets the specifications listed in your owner’s manual.
  • Don’t Overfill: Overfilling can lead to excessive crankcase pressure and oil leaks. Use the sight glass to check the level after running the engine.
  • Filter Preference: Some owners prefer specific aftermarket oil filters for better oil flow; for example, certain K&N filters may have slightly larger passages compared to OEM or other brands.
  • Torque Specs: Always tighten the drain bolt and oil filter cover bolts to manufacturer’s torque specs to avoid leaks or accidental strip-out.
  • Cold Starts: After an oil change, let the engine idle for a minute or two before running at any load. This allows proper oil flow throughout the engine.
  • Visual Checks: Use the sight glass for a quick check between rides: oil should always be between the minimum and maximum marks.

For all Kawasaki KLX110L parts and oil change kits, visit MotoSport.com for fast shipping and expert support.

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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.