How to Change the Coolant in a 2022 Kawasaki KX112

Shop parts for a 2022 Kawasaki KX112 Dirt Bike.

Routine coolant changes are crucial for maintaining peak performance & longevity in your 2022 Kawasaki KX112. Using the right procedures helps your bike avoid overheating, protects internal components, and ensures reliable rides whether you are racing or trail riding. Here is the MotoSport.com exclusive step-by-step guide to changing the coolant in your KX112, plus key things every owner should know about this model:

What You Need

  • Fresh coolant suitable for aluminum radiators
  • 10mm socket or wrench
  • Large Phillips screwdriver
  • Catching pan for old coolant
  • Shop rag for cleanup
  • Funnel (optional but helpful)

Step-by-Step Coolant Change

  1. Prepare the Bike:
    • Ensure the engine is completely cool to avoid burns from hot coolant.
    • Place your KX112 on a stand and remove the radiator shroud if needed for easier access.
  2. Remove the Radiator Cap:
    • Carefully twist off the radiator cap to release any pressure in the system.
    • The KX112, like other Kawasaki competition models, sometimes incorporates an additional bleeder screw. Locate and loosen the bleeder on the opposite side if equipped.
  3. Drain the Old Coolant:
    • Position your catch pan directly beneath the water pump or engine drain bolt. Use a 10mm socket to remove the drain bolt found at the water pump cover area. Allow coolant to fully drain.
    • If present, make sure the bleeder screw remains loose to prevent a vacuum from slowing the drain process.
  4. Flush the System (Recommended):
    • For best results, flush the system with distilled water before refilling. Pour in distilled water, run the bike briefly (with the radiator cap off), and drain again.
  5. Replace and Tighten:
    • Once drained, reinstall the drain bolt. Always start threading by hand to avoid cross-threading and torque to manufacturer specification.
    • If you loosened a bleeder screw, snug it back as well.
  6. Add Fresh Coolant:
    • Use a funnel to slowly refill the radiator with high-quality coolant. Fill until the coolant sits just below the base of the filler neck.
    • If equipped, add coolant until it overflows slightly from the bleeder, then tighten the bleeder to ensure the radiator is free of air pockets.
  7. Bleeding Air:
    • Briefly rock the bike side to side and tap radiator hoses to help trapped air escape. Add coolant as needed. Reinstall the radiator cap securely.
  8. Check for Leaks and Final Level:
    • Start the bike, let it idle, and look for leaks around all fittings. Once fully cooled, double-check the coolant level and top off if needed.

2022 Kawasaki KX112 Owner Tips

  • Race-Ready Engine: The KX112 is designed for high rpm performance, making regular coolant changes even more critical to prevent heat-induced engine damage.
  • Coolant Choice: Only use coolant approved for use in aluminum engines & radiators. Mixing coolant types can reduce efficiency and cause corrosion.
  • Maintenance Interval: Kawasaki recommends inspecting and changing the coolant at regular intervals, especially in high-demand race situations or after long, muddy rides.
  • Be Aware of Model-Specific Features: Some KX112s may have a bleed screw on the opposite end of the radiator for more thorough air removal.
  • Environmental Disposal: Dispose of old coolant responsibly. Never pour used coolant down the drain or onto the ground as it is toxic to people & wildlife.

When in Doubt

If you are not certain about any procedure or see any damage on your radiator cap, hoses, or cooling system, MotoSport.com offers all replacement cooling components you need for your KX112.

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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.