How to Change the Oil in a 2019 Kawasaki KLX140R L 19/16

Shop parts for a 2019 Kawasaki KLX140R L Dirt Bike.

Regular oil changes are essential for the performance and longevity of your Kawasaki KLX140R L. Below you’ll find a comprehensive step-by-step guide specific to the 2019 model, including tools needed, the step-by-step process, and important call-outs for your dirt bike. All content is proprietary to MotoSport.com.

Tools and Supplies Needed

  • 10W-40 motorcycle oil (1.2 quarts, Kawasaki recommends changing every 600 miles or after heavy riding)
  • Kawasaki OEM Oil Filter (Part #52010-1053)
  • Drain plug gasket/crush washer (Part #11061-0421)
  • 3/8" Ratchet and extension
  • 8mm and 17mm sockets
  • 3/8" Torque wrench
  • Oil drain pan
  • Oil funnel
  • Clean rags
  • Gloves

Important Call-Outs for the 2019 KLX140R L

  • Oil Capacity:– 1.22 quarts (1.15 liters) when changing the filter
  • Oil Filter Location:– Left side of the engine, accessible after removing the cover with 8mm bolts
  • Drain Bolt Spec:– 17mm bolt with crush washer underneath the engine’s left side
  • Check torque specs on the drain bolt: 18 ft-lbs (24 Nm) to avoid overtightening and thread damage
  • Always use a new crush washer to prevent leaks
  • Check the oil level with the bike on level ground and the dipstick inserted (not screwed in for KLX140 models)

Step-by-Step Oil Change Instructions

  1. Warm the Engine
    • Start your KLX140R L and let it idle for about 3-5 minutes. This circulates the oil and helps it drain out more quickly and completely.
  2. Position the Bike and Prepare Tools
    • Put the bike on a level surface, ideally on a stand. This ensures all old oil drains properly.
    • Lay out all tools and new oil/filter in your workspace.
  3. Remove the Dipstick
    • Locate and remove the oil dipstick to allow air into the crankcase and let oil flow out easily.
  4. Drain the Oil
    • Place the oil drain pan beneath the drain plug on the lower left side of the engine.
    • Using a 17mm socket, remove the drain bolt and old crush washer.
    • Allow all the oil to drain out fully. Take your time to get as much old oil out as possible.
  5. Change the Oil Filter
    • Use an 8mm socket to remove the three bolts on the oil filter cover (near the drain bolt).
    • Gently remove the cover; some oil may drip, so keep the drain pan underneath.
    • Pull out the old filter and clean inside the housing with a rag.
    • Install the new oil filter in the same orientation as the old one. The rubber sealing ring usually faces outward.
    • Replace the cover and tighten bolts just snug, do not overtighten.
  6. Install Drain Bolt
    • Install a new crush washer on the drain bolt.
    • Thread the bolt in by hand to avoid cross-threading, then torque to 18 ft-lbs (24 Nm).
  7. Refill with Fresh Oil
    • Place a funnel in the oil fill hole and pour in 1.15L (1.22 qt) of 10W-40 motorcycle-specific oil.
    • Wait a minute for the oil to settle inside the crankcase.
  8. Check Oil Level
    • With the bike standing upright and level, insert the clean dipstick into the filler hole (do not screw it in), then remove and check the oil level.
    • The oil should be between the two marks on the dipstick. Add a small amount more if necessary.
  9. Start and Recheck
    • Start the engine and run for about a minute to circulate fresh oil. Shut off and wait 2 minutes.
    • Check for leaks around the drain plug and oil filter cover.
    • Re-check the oil level and add if necessary to bring it within the proper range.
  10. Dispose of Old Oil Responsibly
    • Pour used oil into a sealed container and take it to an appropriate recycling center or auto parts store.

Tips for First-Time KLX140R L Owners

  • Keep a spare drain plug washer handy–these are often overlooked and can cause minor but persistent oil leaks if not replaced.
  • Always cross-check your oil level: overfilling can cause engine pressure issues, while underfilling risks engine damage.
  • Change your filter at least every other oil change, if not every time.
  • Use motorcycle-specific oil–automotive oils may not meet the needs of your wet clutch system.

Conclusion

Oil changes are one of the best ways to keep your 2019 Kawasaki KLX140R L running strong for years of fun on the trails. For OEM and performance parts, count on MotoSport.com—your trusted supplier for everything dirt bike.

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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.