How to Change the Coolant in a 2017 Kawasaki KX100

Shop parts for a 2017 Kawasaki KX100 Dirt Bike.

Changing the coolant on your 2017 Kawasaki KX100 is a key part of dirt bike maintenance that keeps your engine running at ideal temperature, prevents damage, and maximizes performance. The process is straightforward, but the KX100 has a few specifics to consider for a spotless job.

Why Coolant Change Matters

Coolant in your KX100 not only regulates temperature but also protects aluminum parts and internal passages from corrosion. Over time, coolant breaks down and loses its efficacy, so Kawasaki owners should plan to change it every 40–50 hours of ride time or at least once per season.

What You Need

  • Fresh engine coolant, compatible with aluminum (premixed or ready to dilute with distilled water)
  • 10mm wrench or socket
  • Drain pan
  • Funnel
  • Shop towels
  • New crush washer (recommended, not required)
  • Protective gloves & eye wear

Model-Specific Tips for the 2017 KX100

  • The coolant drain bolt is located on the water pump cover, typically on the right side of the engine. Owners should double-check placement specific to KX100 models before starting.
  • A crush washer sits beneath the drain bolt; make sure you do not lose it. Replacing it prevents leaks on reassembly.
  • Always change coolant on a completely cooled engine. Removing the radiator cap or drain bolt while the bike is hot risks burns due to high pressure and temperature in the system.

Step-by-Step Coolant Change Guide

  1. Cool the engine—Make sure your KX100 is completely cool before you begin the process.
  2. Remove the radiator cap—Twist off the radiator cap slowly to release any remaining pressure.
  3. Locate & remove the coolant drain bolt—Find the drain bolt on the water pump cover (right side). Position your drain pan beneath and use a 10mm wrench or socket to loosen the bolt. Allow the coolant to drain completely.
  4. Drain residual coolant—To ensure a thorough flush, slightly tilt the bike side to side. For a meticulous job, gently loosen the hose at the base of the radiator to let out any trapped coolant, if desired.
  5. Inspect & replace the crush washer—Examine the washer for damage; replace if flattened or cracked.
  6. Reinstall the drain bolt and tighten securely—Do not overtighten; a snug fit is sufficient for the KX100. If using a new washer, torque to spec per your owner's manual.
  7. Add new coolant—With a funnel, fill the radiator to the brim using your chosen coolant. Pour slowly to prevent air pockets. Squeeze radiator hoses gently by hand to release trapped air bubbles.
  8. Replace the radiator cap—Secure the cap tightly once the system is fully filled.
  9. Start the engine & warm it up—Let the bike idle for a few minutes, then turn off and allow it to cool. Check the coolant level. Top off if necessary.
  10. Clean up—Wipe away any spilled coolant. Used fluid should be disposed of according to local hazardous waste regulations.

Owner Notes

  • The 2017 KX100 is vulnerable to overheating on prolonged hard rides if coolant is neglected. Always monitor levels before each outing.
  • Use coolant formulated specifically for aluminum radiators to ensure internal protection. Never run plain water except in an emergency, as it offers zero corrosion resistance.
  • Air pockets in the KX100's small-radiator design can cause hot spots. Be thorough when bleeding air from the system after filling.

Pro Tip

To maximize cooling system reliability, inspect all hose connections and clamps while the coolant system is open. Replace brittle hoses or worn clamps before they fail mid-ride.

Related Shopping Categories

Shop Radiators for a 2017 Kawasaki KX100 Dirt Bike.

Shop Coolant for a 2017 Kawasaki KX100 Dirt Bike.

Shop Temperature Sensors for a 2017 Kawasaki KX100 Dirt Bike.

Shop Tools for a 2017 Kawasaki KX100 Dirt Bike.

Shop Radiator Hoses for a 2017 Kawasaki KX100 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.