How to Change the Coolant in a 2002 Kawasaki KX60

Shop parts for a 2002 Kawasaki KX60 Dirt Bike.

Changing the coolant on your 2002 Kawasaki KX60 is a crucial part of regular maintenance. This guide, created specifically for MotoSport riders, outlines a safe, reliable process tailored to the KX60’s unique design – keeping your two-stroke mini ready for anything the track or trail throws at it.

What You’ll Need

  • 8mm and 10mm sockets or wrenches
  • Phillips screwdriver
  • Drain pan
  • Fresh coolant compatible with dirt bikes (avoid automotive coolants)
  • Distilled water for flushing (optional, but best for mineral-free flushing)
  • Clean rag
  • Funnel (optional)
  • Protective gloves and eyewear

Step 1 – Prep the KX60

  • Ensure the bike is completely cool before starting. Hot coolant can cause serious injuries.
  • Set the bike upright on a stand and remove the left side panel if needed for easier radiator access.
  • Place your drain pan under the water pump drain bolt – typically an 8mm bolt at the lowest point of the right engine cover. Double-check your owner’s manual for the exact location, as the KX60’s compact engine makes this easy to spot.

Step 2 – Drain the Old Coolant

  • Remove the radiator cap slowly to relieve pressure. Do not attempt this while hot.
  • Remove the water pump drain bolt. Coolant will begin flowing out – allow it to fully drain.
  • If your KX60 has a coolant overflow reservoir, disconnect the hose & empty it as well.

Step 3 – Flush the Cooling System (Recommended)

  • Replace the drain bolt temporarily.
  • Pour distilled water into the radiator until full, then reinstall the cap briefly and shake the bike gently from side to side.
  • Remove the drain bolt again to allow the rinse water to drain.
  • Repeat this flush if the outgoing water looks dirty or if the previous coolant was old or contaminated.

Step 4 – Refill with Fresh Coolant

  • Install and tighten the drain bolt; do not overtighten as the case threads are small on the KX60.
  • Using a funnel, slowly fill the radiator with coolant until it reaches the base of the filler neck. The KX60 holds just under 0.5L, so proceed carefully to avoid spills.
  • Lightly squeeze the coolant hoses by hand to help burp any air.
  • Leave the radiator cap off for now.

Step 5 – Bleed the System and Check Levels

  • Start the engine and let it idle for about a minute, gently rocking the bike side to side. Shut off the engine and check the coolant level.
  • Top off coolant as needed, then fully reinstall the radiator cap.
  • If your bike has an overflow tank, fill it to the correct level.

Step 6 – Final Inspection

  • Inspect for any leaks around the drain bolt, hoses, and radiator cap.
  • Safely dispose of all used coolant – never pour it down the drain or on the ground.
  • Reinstall bodywork and go for a gentle ride, periodically checking for leaks and ensuring the engine operates at normal temperature.

KX60-Specific Tips

  • The 2002 KX60 is prized for its simplicity – there is no thermostat. This means coolant must be carefully managed to prevent air pockets, especially after a complete flush.
  • Watch the coolant level for several rides after servicing, as any trapped air will eventually work its way out, causing the level to drop.
  • Only use coolants safe for magnesium/aluminum engine parts. The KX60 has lightweight cases that can corrode quickly if incorrect fluids are used.
  • Routine coolant changes (ideally, once per season or following heavy use) will prolong engine and water pump seal life – crucial for high-revving minis like the KX60.

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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.