How to Change the Oil in a 2012 Kawasaki KLX140R L 19/16

Shop parts for a 2012 Kawasaki KLX140L Dirt Bike.

The 2012 Kawasaki KLX140R L 19/16 is a reliable trail motorcycle, but like all dirt bikes, it requires routine oil changes to maintain optimal engine performance. Regular oil changes prevent engine wear and extend the life of your bike, ensuring every ride is as smooth as the first. Below, you'll find a step-by-step guide on how to change the oil, a list of all necessary tools and supplies, and important model-specific tips for the KLX140R L. This content is proprietary to MotoSport.com.

Tools and Supplies You’ll Need

  • Ratchet and extension
  • 8mm and 17mm sockets
  • Drain pan
  • Torque wrench
  • Oil funnel
  • Clean rags
  • OEM or quality replacement oil filter (Kawasaki 52010-1053 recommended)
  • Replacement drain plug gasket (Kawasaki 11061-0421 recommended)
  • 10W-40 four-stroke motorcycle oil (at least 2 quarts; oil capacity is 1.22 quarts for the KLX140L)
  • Brake cleaner or degreaser (optional for cleaning)

Step-by-Step Oil Change Instructions

  • Warm up the engine: 
    Start your KLX140R L and let it idle for a minute. Warm oil drains more easily and carries away contaminants more effectively.
  • Remove the dipstick: 
    With the engine off, remove the oil dipstick located on the right-hand side of the engine. This vents the crankcase and allows oil to flow out smoothly.
  • Position your drain pan: 
    Place a drain pan underneath the drain bolt (bottom left side of the crankcase).
  • Remove drain bolt and crush washer: 
    Use the 17mm socket to remove the drain bolt and washer. Watch for hot oil and avoid direct skin contact.
  • Allow oil to drain completely: 
    Let the oil flow until it slows to a drip. This may take several minutes. Wipe away any oil from the area with your rag.
  • Replace the oil filter: 
    Locate the oil filter cover on the engine’s lower right side. Remove the bolts using the 8mm socket, then remove the oil filter. Insert your new filter (matching the original direction) and replace the cover. Always check the orientation of the spring and the filter.
    Pro tip: The KLX140R L filter can sometimes stick—use a clean rag to pull it out if needed.
  • Install new drain plug gasket and bolt: 
    Replace the crush washer with a new one. Hand-tighten the drain plug, then use a torque wrench to tighten it to factory spec (check your manual, typically around 22 ft-lbs). Do not over-tighten, which could damage threads.
  • Refill engine oil: 
    Using a funnel, pour in fresh 10W-40 motorcycle oil until you reach the specified capacity.
    KLX140R L Oil Capacity:  1.22 quarts (with filter change)
  • Check oil level: 
    Insert the dipstick but DO NOT screw it in fully. Remove and check the oil level. Add oil as needed so the oil is in the correct range.
    Note for KLX140R L:  This model often requires you check the oil with the dipstick unscrewed for accuracy.
  • Start the engine and check for leaks: 
    Run the engine for a minute. Shut it off and inspect for leaks around the drain plug and filter area.
  • Recheck oil level: 
    Let the bike sit for a few minutes, then repeat the oil check. Top off if necessary.
  • Clean up and properly dispose of old oil: 
    Wipe down any oil residue and take your used oil to a recycling center.

Important KLX140R L (2012/19/16) Model-Specific Call-outs

  • The correct oil capacity with filter replacement for the KLX140L (including the “R L 19/16” variant) is 1.22 quarts. Overfilling can cause excess crankcase pressure and gasket leaks.
  • Always use a new crush washer with each oil change; the old one can cause leaks if reused.
  • Check the oil level with the dipstick unscrewed–threading it in will result in a false low reading for this model.
  • The 2012 KLX140R L uses a wet clutch, so only use motorcycle-specific oil, never automotive motor oil.

Conclusion

Changing the oil on your 2012 Kawasaki KLX140R L 19/16 is straightforward but requires attention to detail. Always follow factory torque specifications, use recommended parts and oils, and check for leaks after completion. This ensures your off-road experience stays reliable and enjoyable. For all your OEM filters, parts, and supplies, visit MotoSport.com — your trusted source for dirt bike maintenance.

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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.