How to Change the Coolant on a 2012 Kawasaki KLX140R L 19/16

Shop parts for a 2012 Kawasaki KLX140L Dirt Bike.

Maintaining proper coolant levels in your 2012 Kawasaki KLX140R L 19/16 is key to keeping the engine running cool, especially during long trail rides or aggressive off-road use. Performing a coolant change regularly ensures optimal temperature control, prevents overheating, and extends the life of vital engine components. Below you'll find a proprietary step-by-step guide from MotoSport for changing the coolant on your KLX140R Lalong with model-specific tips every owner should know.

What You'll Need

  • New high-quality motorcycle coolant (avoid automotive coolant, which may not be silicate-free)
  • Socket set: 8mm and 10mm
  • Clean funnel
  • Drain pan/container
  • Phillips screwdriver
  • Rag for cleanup
  • Distilled water (for flushing, optional but recommended)
  • Gloves and eye protection

1. Preparation

  • Ensure the engine is completely cool before beginninghot coolant can cause burns.
  • Place your KLX140R L on a stable stand or level surface.
  • Remove the right side cover and seat by loosening the 8mm/10mm bolts and the appropriate screws to access the radiator and coolant overflow bottle. You may need to temporarily lift the right tank shroud for access.

2. Draining Old Coolant

  • Remove the radiator cap to relieve system pressure and allow airflow for draining.
  • Locate the coolant drain bolt on the lower side of the water pump cover. Place your drain pan underneath and carefully remove this bolt with your 10mm socket.
  • Allow the coolant to fully drain. You may gently tilt the bike side to side to help removal of trapped coolant.
  • Optionally, flush the system with distilled water by temporarily reinstalling the drain bolt, adding distilled water to the radiator, and then repeating the drain.

3. Reinstalling the Drain Bolt

  • Once fully drained, reinstall the drain bolt and torque it to manufacturer spec. Inspect the drain bolt washer for wear and replace if needed.

4. Refilling Coolant

  • Slowly pour new motorcycle-specific coolant into the radiator neck using a funnel until it reaches the base of the filler neck. Fill the overflow reservoir to the indicated level as well.
  • Tilt or gently rock the bike to help dislodge any air bubbles in the system. You may also lightly squeeze the lower radiator hose.

5. Bleeding the System

  • Install the radiator cap loosely, then start the engine and run for 1-2 minutes. Turn the engine off, let cool briefly, then check and top off both the radiator and the overflow reservoir, as coolant may settle once air escapes.
  • Reinstall the radiator cap securely.

6. Reassembly and Final Check

  • Reattach the right tank shroud, side cover, and seat. Ensure all fasteners are tight and all tools and rags are removed from the workspace.
  • After the first ride, double-check coolant levels in both radiator and overflow. Topping off may be required as small air bubbles escape.

Kawasaki KLX140R L 19/16 Owner Notes

  • The KLX140R L's compact cooling system means coolant change intervals are especially important if you ride muddy or slow technical trails, where airflow is limited.
  • Always use a silicate-free motorcycle coolant to protect the lightweight aluminum radiator and water pump from corrosion and wear.
  • Avoid opening the radiator cap when hotwait until fully cooled.
  • Coolant capacity for the 2012 KLX140R L is approximately 0.87 liters (0.92 US quarts), but always check for proper fill at the radiator neck and overflow mark rather than relying solely on volume.

Changing your coolant as part of a regular maintenance routine not only gives peace of mind but also helps prevent expensive overheating issues on the trail. Stay ahead of maintenance and keep your KLX140R L running strong.

Related Shopping Categories

Shop Radiators for a 2012 Kawasaki KLX140L Dirt Bike.

Shop Coolant for a 2012 Kawasaki KLX140L Dirt Bike.

Shop Temperature Sensors for a 2012 Kawasaki KLX140L Dirt Bike.

Shop Tools for a 2012 Kawasaki KLX140L Dirt Bike.

Shop Radiator Hoses for a 2012 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.