How to Change the Coolant in a 1989 Kawasaki KX60: Step-by-Step Guide

Shop parts for a 1989 Kawasaki KX60 Dirt Bike.

Changing the coolant in your 1989 Kawasaki KX60 is straightforward and vital for keeping the engine temperature in check, maximizing performance, and preventing costly overheating issues. Owners of this classic MX mini know the two-stroke KX60 is built for reliable fun, but routine coolant maintenance ensures the legacy keeps running strong.

What You Need

  • Fresh engine coolant suitable for dirt bikes
  • Drain pan
  • 8mm wrench or socket
  • Phillips screwdriver (for bleeder screws, if equipped)
  • Shop rags
  • Funnel
  • Distilled water (if mixing coolant)
  • Protective gloves and eyewear

Preparation – Before You Start

  • Only change coolant when the bike is completely cool to avoid burns.
  • Set the bike upright and secure on a stand.

Step 1: Remove the Radiator Cap

  • Locate the radiator cap at the top of the radiator.
  • Turn it counterclockwise and remove slowly to relieve any built-up pressure.

Step 2: Drain the Old Coolant

  • Locate the drain bolt at the base of the right-side engine coverusually an 8mm bolt with a washer just below the water pump area.
  • Place a drain pan underneath and carefully remove the bolt, allowing coolant to drain completely.
  • If your KX60 has a bleeder screw on the radiator's side, open it with a Phillips screwdriver to help air escape and coolant flow out smoothly.

Step 3: Flush (Optional but Recommended)

  • For best results, pour clean distilled water into the radiator, reinstall the cap, and gently rock the bike.
  • Remove the drain bolt again and let the water flush out more contaminants.

Step 4: Reinstall the Drain Bolt

  • Ensure the sealing washer is intact and not cracked or flattened.
  • Hand-thread the bolt and tighten it snuglydo not overtighten to avoid engine case damage.

Step 5: Refill with Fresh Coolant

  • Using a funnel, slowly pour in fresh coolant until it reaches the base of the filler neck.
  • If your bike has a bleeder screw, leave it open as you pour coolant until fluid drips steadily out, then close securely.

Step 6: Bleed Out Any Air

  • Gently rock the bike side to side to help air bubbles rise.
  • Start the bike and let it idle for a few minutes, then shut off and allow to cool.
  • Check the coolant level again and top off if needed.

Step 7: Final Inspection

  • Inspect for leaks at the drain bolt and around the radiator cap and hoses.
  • Ensure radiator cap is tightly secured.
  • Wipe up any spilled coolant.

Special Tips for the 1989 Kawasaki KX60

  • This model uses a simple, small-capacity cooling system – check fluid levels often, especially after rides in hot weather or aggressive conditions.
  • The KX60's radiator and hoses are exposed. Inspect hoses for aging cracks and the radiator for bent fins during every coolant change.
  • Always use dirt bike-specific coolant as automotive/multi-vehicle types can foam or corrode lightweight aluminum components.
  • Check the service manual if you suspect residual air in the system, as trapped bubbles can cause overheating or intermittent coolant loss.

Consistent coolant changes protect the legendary KX60 engine, keeping performance crisp for the next generation of moto enthusiasts.

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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.