How to Change the Oil in a 2015 Kawasaki KLX140R L 19⁄16

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Regular oil changes are crucial for keeping your 2015 Kawasaki KLX140R L (with 19” front and 16” rear wheels) running strong on the trails. This guide covers everything you need—tools, steps, and key model notes—so you can maintain your dirt bike confidently. This content is proprietary to MotoSport.com.

Tools and Supplies Needed

  • Ratchet and extension
  • 8mm socket (for oil filter cover)
  • 17mm socket (for drain bolt)
  • Torque wrench
  • Drain pan
  • Funnel
  • Clean shop rags
  • Kawasaki OEM oil filter (part #52010-1053)
  • Drain plug gasket/crush washer (part #11061-0421) (recommended)
  • 10W-40 motorcycle oil (at least 2 quarts, use motorcycle-specific oil)
  • Gloves (optional, keeps hands clean)

Before You Begin

  • The 2015 KLX140R L uses a 144cc air-cooled 4-stroke engine.
  • Oil capacity is 1.22 quarts (1.15 liters) including filter change—don’t overfill.
  • Changing both oil and filter is recommended every oil service.
  • Be sure the engine is cool enough to work on, but run it for a minute or two before starting to warm and thin the oil for easier draining.

Step-by-Step Oil Change for Kawasaki KLX140R L (2015)

  1. Warm up the engine
    Start your bike and let it idle for 1-2 minutes. This warms the oil, helping it drain completely.
    Tip: Don’t let the engine get too hot. Just slightly warm to the touch.
  2. Remove the dipstick
    Unscrew and pull out the oil dipstick from the right side of the engine. This vents the crankcase, letting oil drain faster and more completely.
    Model Note: The dipstick is near the kickstarter on the right; keep it clean to avoid debris falling into the engine.
  3. Drain the old oil
    Place your drain pan under the lower left side of the engine. Use the 17mm socket to remove the drain bolt and crush washer.
    Let the oil fully drain (a few minutes). Inspect and clean the drain bolt; replace the crush washer with a new one if possible to avoid future leaks.
    Model Note: The drain bolt is on the lower left side—be careful, as hot oil may flow out quickly at first.
  4. Remove the oil filter
    Use the 8mm socket to remove the bolts holding the filter cover (right lower side). Gently pull off the cover and old filter. Wipe out the cover with a clean rag.
    Model Note: Pay attention to the filter’s orientation so you install the new one correctly. There’s a small spring behind the filter—make sure it stays in place.
  5. Install the new oil filter
    Lightly oil the new filter with a dab of fresh engine oil. With the spring in place, insert the filter into the housing. Reinstall the filter cover and torque bolts evenly (do not overtighten to avoid stripping).
  6. Reinstall the drain bolt
    Once the oil has fully drained, reinstall the drain bolt with a new crush washer. Torque it to spec (consult your owner’s manual, but typically around 22 ft-lb (30 Nm)). Don’t overtighten.
  7. Fill with fresh oil
    Insert a funnel into the dipstick hole. Add fresh 10W-40 motorcycle oil—start with about 1.1 quarts. Let the oil settle, then check the oil level with the dipstick (insert but do NOT screw in). The oil should be between the upper and lower marks.
    Top off in small increments until the correct amount is reached; avoid overfilling.
    Model Note: The proper fill is 1.22 quarts (1.15 L) when changing the filter.
  8. Check for leaks and consistency
    With the drain pan still in place, briefly start the engine (about 30 seconds), then shut it off and inspect around the drain bolt and filter cover for leaks. Wait a minute, then recheck the oil level; add if needed.
    Be sure to properly dispose of old oil and filter according to local regulations.
  9. Reinstall the dipstick and wipe down any oil residue. Ensure the seat and side panels are secure if you removed them for better access.

Specific Call-Outs for the 2015 KLX140R L

  • Oil capacity is critical—1.22 quarts, do not overfill.
  • Use only motorcycle-rated 10W-40 oil, not automotive oil.
  • The small spring behind the filter can drop out during removal; ensure it’s reinstalled first before the new filter goes in.
  • Always check for drips/leaks after the first ride post-oil change.
  • Dispose of oil responsibily at a certified collection center.

Final Tips

  • Keep a maintenance log to track oil changes and filter replacements.
  • If in doubt, consult your KLX140R L owner’s manual for detailed torque specs, diagrams, and best practices.
  • Perform this service every 6 months or 15–20 hours of riding, whichever comes first, to maximize your KLX’s life and performance.

Changing the oil on your 2015 Kawasaki KLX140R L 19⁄16 not only saves you money, but keeps your MotoSport.com ride in peak condition for every adventure ahead.

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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.