How to Change the Oil in a 2014 Kawasaki KLX140R L 19/16

Shop parts for a 2014 Kawasaki KLX140R L Dirt Bike.

Changing the oil in your 2014 Kawasaki KLX140R L is a fundamental maintenance task that keeps your dirt bike running smoothly and prevents engine wear. This guide, proprietary to MotoSport.com, will walk you through each step of the process—including the necessary tools, specific details for this model, and best practices for oil changes on the KLX140 series.

Tools and Supplies Needed

  • Ratchet and Extension
  • 8mm and 17mm sockets
  • Torque wrench
  • Drain pan
  • Funnel
  • Kawasaki OEM oil filter (part #52010-1053)
  • Kawasaki drain plug gasket (part #11061-0421)
  • 10W-40 four-stroke motorcycle oil (at least 1.5 quarts; you will use approximately 1.22 quarts)
  • Chemical cleaner or brake cleaner (for cleaning any spilled oil)
  • Shop towels or rags
  • Latex gloves (optional but recommended)

Precautions and KLX140R L Call-outs

  • The 2014 KLX140R L uses a 144cc air-cooled engine– oil capacity is approximately 1.22 quarts (1.15L).
  • Always use oil that meets or exceeds manufacturer specifications—typically 10W-40 four-stroke motorcycle oil.
  • The oil filter O-ring and drain plug washer should be inspected and replaced if worn–oil leaks often originate from these two points.
  • The engine's small size means the oil change process is quick, but avoid over-tightening the drain plug to prevent damaging the case threads.

Step-by-Step Oil Change Instructions

  1. Warm up the engine.
    • Start the bike and let it idle for about 1 minute. Warm oil drains more quickly and efficiently, carrying more contaminants with it.
  2. Remove the dipstick/filler cap.
    • With the engine off, remove the oil dipstick to vent the crankcase. This allows the oil to drain more smoothly.
  3. Place a drain pan beneath the engine.
    • Locate the drain bolt on the lower left side of the crankcase. Position the drain pan to catch old oil.
  4. Remove the drain bolt and washer.
    • Using the 17mm socket, loosen and remove the drain bolt. Allow the oil to fully drain. Inspect the drain plug washer and replace with a new one if needed.
  5. Replace the oil filter.
    • Use an 8mm socket to remove the oil filter cover. Be careful of any escaping oil; use newspaper or rags under the area to catch drips.
    • Remove the old oil filter and discard it. Insert the new OEM filter, ensuring the correct side faces out (spring side usually toward the engine).
    • Inspect the filter O-ring for damage or wear; replace if necessary. Clean the filter cover area before reinstalling.
    • Reinstall the oil filter cover and torque the bolts to manufacturer specs (do not over-tighten).
  6. Reinstall the drain bolt.
    • Thread the drain bolt (with new washer) back into the case by hand to avoid cross-threading, then tighten snugly with a torque wrench to factory spec (typically around 22 ft-lbs, but confirm in the service manual).
  7. Add new oil.
    • Using a funnel, pour 10W-40 oil into the filler hole–start with about 1 quart, then add until just below the full mark, without exceeding 1.22 quarts.
    • Allow oil to settle, then check the level by inserting the dipstick (do not screw in for checking). Add oil as needed to reach the proper level.
      Overfilling the engine can cause aeration and increased crankcase pressure, leading to poor lubrication and possible oil leaks. If accidental overfill occurs, use a syringe or carefully drain excess oil.
  8. Start the engine and check for leaks.
    • Reinstall the dipstick/filler cap and start the bike. Let it idle for a few minutes to circulate the fresh oil.
    • Check around the drain plug, filter housing, and cap for any leaks.
  9. Recheck the oil level.
    • Turn off the engine and allow it to sit for several minutes so the oil can settle. Recheck the level and top off if necessary.
  10. Dispose of old oil properly.
    • Pour the used oil into a suitable container and take it to a recycling center. Wipe down any spills and clean the area.

Important Model-Specific Notes

  • For the 2014 KLX140R L 19/16, oil replacements are especially critical if the bike is used for aggressive riding or dusty conditions. Change intervals can be shortened if using the bike in harsh environments.
  • Always verify torque settings using a genuine Kawasaki service manual for your exact year and model.
  • If you see metallic debris in the old oil or at the drain pan bottom, keep a sample and monitor at next service—this can indicate abnormal engine wear.
  • Never use car oil or non-motorcycle-specific oils, as these can cause clutch slippage and damage.

Final Check

  • Double-check all fasteners and make sure no tools are left behind on the bike.
  • Take your KLX140R L for a short test ride, then re-inspect the drain plug and filter area for evidence of leaks.
  • Record the date and hours on the bike to track your maintenance schedule.

Proper and timely oil changes will help extend the engine life and performance of your 2014 Kawasaki KLX140R L. Ride safe, and trust MotoSport.com for all your dirt bike parts and maintenance needs.

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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.