How to Change the Oil in a 2020 KAWASAKI KLX140R L 19/16

Shop parts for your ride now.

Changing the oil in your 2020 Kawasaki KLX140R L is one of the most important maintenance tasks you can perform to ensure the bike runs smoothly and reliably. Not only does regular oil and filter service protect your engine, but it also prolongs the bike’s life and maximizes performance. Follow this robust, step-by-step guide, specifically crafted for the 2020 KLX140R L 19/16 dirt bike from MotoSport.com, to change your oil like a pro.

Tools and Supplies Needed

  • Ratchet and extension
  • 8mm and 17mm sockets
  • Drain pan
  • Torque wrench
  • New oil filter (Kawasaki OEM #52010-1053 recommended)
  • 10W-40 motorcycle oil (minimum 2 quarts)
  • Replacement crush washer (optional but recommended)
  • Clean shop rags
  • Rubber gloves (optional for cleanliness)

Preparation

  • Warm up the engine:– Start the bike and let it idle for about a minute. This helps thin out the oil so it drains more completely and quickly.
  • Turn off the engine and secure the bike:– Use the kickstand or a maintenance stand on level ground.
  • Gather all necessary tools and supplies in your workspace. Make sure the bike is cool enough to touch by the time you are ready to begin working near the engine casing.

Step-by-Step Oil Change Instructions

  1. Remove the dipstick:– Unscrew and remove the oil dipstick from the right side of the engine. This vents the crankcase and allows the oil to drain more rapidly and completely.
    Call-out for KLX140R L:– The dipstick is easy to access; however, always make sure to set it aside in a clean, safe place while performing the service for accurate rechecking later.
    Reference oil capacity:– The KLX140L (which shares the same engine as your KLX140R L) holds approximately 1.22 quarts (1.15 liters) of oil with filter change.
  2. Drain the old oil:– Place your drain pan underneath the left side of the crankcase. Use a 17mm socket and ratchet to remove the oil drain bolt and crush washer from the lower left side of the engine. Allow the oil to fully drain into the pan.
    • Check the crush washer:– Inspect the washer; replace if it is damaged or flattened to prevent leaks.
    • KLX140R L call-out:– The drain plug can become very hot after the engine runs, so take care. The drain location is easy to spot, but be sure to properly align your pan to catch all the oil.
  3. Remove the oil filter cover:– Use an 8mm socket to remove the bolts holding the oil filter cover (found on the lower left side near the drain plug). Gently pull off the cover.
    • Pay attention to the placement of the rubber O-ring; make sure it does not fall out or get lost. Inspect the O-ring and replace if damaged.
  4. Replace the oil filter:– Pull the old oil filter straight out. Wipe the area clean with a shop rag. Lightly oil the seal of your new filter with a dab of fresh oil, then install it, ensuring correct direction (if not marked, consult your owner’s manual—usually the open side with visible holes faces outward).
    • KLX140R L call-out:– The oil filter size and style have not changed for this engine type since 2010, so any KLX140 series filter of the same model will fit.
  5. Reinstall the oil filter cover:– Carefully replace the cover, making sure the O-ring is properly seated. Install the bolts and tighten them evenly by hand. Finish tightening to specification with a torque wrench (refer to your service manual for exact torque—generally around 7 ft-lb/10 Nm).
  6. Install the drain bolt:– Replace the crush washer if needed, then thread the drain bolt by hand. Tighten with the 17mm socket and finish with the torque wrench (18 ft-lb/25 Nm is typical).
  7. Add new oil:– Place a funnel in the filler opening and add high-quality 10W-40 motorcycle oil until you reach the low line on the dipstick with the bike upright and level. Typically, this requires about 1.22 quarts (1.15 liters) for a full oil and filter change.
  8. Check for leaks:– Reinstall the dipstick, start the engine, and let it run for 1–2 minutes. Shut off the engine and look for leaks from the drain plug or filter cover.
  9. Verify oil level:– With the bike upright and on level ground, remove the dipstick, wipe it, reinsert (do not screw in), then remove again to check the level. Add oil if necessary to bring it to the full line. Reinstall and tighten the dipstick when finished.

Model-Specific Notes for 2020 KLX140R L 19/16

  • This bike uses the same engine as other KLX140 variants from 2010 through 2024,– so these instructions and specifications are valid for all corresponding models.
  • The drain bolt, filter, and fill locations are unchanged,– making part sourcing and procedures straightforward for this model family.
  • Do not overfill:– Excess oil can lead to engine damage. Use the dipstick method described above. Always check oil on level ground with the bike held upright (not on the kickstand).
  • Disposal:– Take used oil and filter to your local recycling center or auto parts store for proper disposal. Never dump it down the drain or on the ground.

Final Tips from MotoSport.com

  • Regular oil changes—ideally every 10 hours of ride time or after every other ride in harsh conditions—will keep your KLX140R L running at its best.
  • Always use motorcycle-specific oil, as automotive oils lack the proper additives for wet clutches and high-revving dirt bike engines.
  • Keep records of each oil change for resale value and maintenance tracking.

With this detailed guide, you’re ready to confidently perform oil changes on your 2020 Kawasaki KLX140R L 19/16 and keep your bike in top shape for every ride.

Related Shopping Categories

Shop Motor Oil for a 2020 KAWASAKI KLX140L Dirt Bike.

Shop Oil Filters for a 2020 KAWASAKI KLX140L Dirt Bike.

Shop Oil Drain Pans for a 2020 KAWASAKI KLX140L Dirt Bike.

Shop Tools for a 2020 KAWASAKI KLX140L Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2020 KAWASAKI KLX140L 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.