How to Change the Oil in a 2018 Kawasaki KLX140R L 19/16

Keeping up with regular oil changes is crucial for the performance and longevity of your 2018 Kawasaki KLX140R L 19/16. Below you'll find a comprehensive, proprietary guide from MotoSport.com, including the specific tools you'll need, precautions for your model, and step-by-step instructions for a safe and effective oil change.

Tools and Supplies Needed

  • Ratchet and extension (recommended 3/8")
  • 8mm and 17mm sockets
  • 3/8& Torque wrench (for proper drain bolt torque)
  • Oil drain pan
  • Oil filter (Kawasaki OEM Part #52010-1053)
  • New drain plug crush washer/gasket (Kawasaki OEM Part #11061-0421, highly recommended)
  • 10W-40 motorcycle oil (minimum 1.25 quarts/1.2 liters)
  • Oil funnel (to avoid spills)
  • Clean shop towels or rags
  • Brake cleaner (optional, for cleanup)
  • Nitrile gloves (optional, for protection)

Preparation and Model-Specific Callouts

  • The 2018 KLX140R L uses a 144cc air-cooled engine. The oil capacity is approximately 1.22 quarts (1.15 liters) with filter replacement. Do not overfill.
  • Check your owner's manual for any updates for your bike's year, but the KLX140 line has kept a similar process and oil capacity across years and models since launch.
    Tip: Always use a new drain bolt crush washer to avoid leaks and torque the drain bolt to manufacturer specification (typically 11 ft-lbs – 15 Nm).

Step-by-Step Oil Change Instructions for the KLX140R L

  • 1. Warm up the engine: Start your KLX140R L and let it idle for 1-2 minutes. This thins the oil and helps it drain more completely.
  • 2. Remove the dipstick: Turn off the engine and remove the dipstick from the right side of the engine. This vents the crankcase and speeds up draining.
  • 3. Drain the old oil:
    • Place your oil drain pan under the left side of the engine, directly beneath the 17mm drain bolt.
    • Using a 17mm socket and ratchet, carefully loosen and remove the oil drain bolt and crush washer (be cautious—the engine cases and oil may be hot).
    • Allow oil to fully drain for several minutes.
  • 4. Replace the oil filter:
    • Use an 8mm socket to remove the oil filter cover bolts (located on the lower left engine case).
    • Carefully remove the cover and old oil filter. Note the orientation; the filter has a specific direction and may include a spring behind it.
    • Wipe inside the cover and engine case with a clean rag.
    • Install a new oil filter (Kawasaki #52010-1053) in the correct orientation.
    • Reinstall the cover, ensuring the sealing surface is clean, and torque the bolts evenly to avoid overtightening.
  • 5. Inspect and reinstall the drain bolt:
    • Clean the drain bolt and install a new crush washer/gasket.
    • Reinstall the bolt by hand and torque to 11 ft-lbs (15 Nm).
    • Wipe up any spilled oil from the frame and engine area.
  • 6. Add new oil:
    • Using a funnel, pour in 1.2 quarts (1.15 liters) of 10W-40 motorcycle oil.
    • Reinstall the dipstick and start the engine.
    • Let the bike idle for 1-2 minutes, then turn it off to let the oil settle for another 1-2 minutes.
  • 7. Verify and top off oil:
    • Remove the dipstick, wipe it clean, then reinsert it without screwing it in. Remove it again and check that the oil level is between the low and full marks.
      Note: Some models specify checking with the dipstick fully screwed in—double-check your manual for clarification. If in doubt, default to not screwing it in for the KLX140R L.
    • Top off oil as needed to reach the correct level.
  • 8. Final inspection and cleanup:
    • Check the drain bolt and oil filter area for leaks.
    • Clean any spilled oil from the bike using brake cleaner and rags.
    • Reinstall the dipstick securely.
    • Dispose of used oil and filters properly at a recycling facility or auto parts store.

KLX140R L Owner-Specific Tips and Precautions

  • Always use a motorcycle-specific oil filter and 10W-40 oil designed for wet clutches.
  • Never overfill—too much oil can lead to poor performance and increased engine wear.
  • If you ride in extreme conditions (muddy, dusty, or hot environments), consider changing the oil more frequently.
  • The oil capacity with filter change is about 1.22 quarts. Be cautious when adding oil and check the level multiple times.
  • The oil filter orientation is important—incorrect installation can cause oil bypass and engine damage.

Conclusion

A proper oil change on your 2018 Kawasaki KLX140R L 19/16 keeps your ride running strong and ensures lasting engine performance. Stick to a regular maintenance schedule and use the correct parts and fluids. For OEM filters, specialty tools, or high-quality oils, shop MotoSport.com—your trusted source for everything dirt bike.

Ride on and keep that KLX at its best.

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Shop Tools for a 2018 Kawasaki KLX140R L 19/16 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2018 Kawasaki KLX140R L 19/16 Dirt Bike.

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.