How to Change the Coolant in a 2017 Kawasaki KLR650

Shop parts for a 2017 Kawasaki KLR650 Dirt Bike.

The 2017 Kawasaki KLR650 is a legendary dual-sport renowned for its rugged build, long-distance capability, and air-cooled simplicity. Routine cooling system maintenance, especially changing the coolant, is essential for reliable engine performance and protection against overheating. Here's a detailed, MotoSport-exclusive guide to changing the coolant on your KLR650, with tips specific to this model year.

Why Change the Coolant?

Over time, coolant breaks down, loses its anti-corrosive properties, and may accumulate debris. Fresh coolant helps prevent overheating and protects internal engine components from corrosion and scale buildup.

What You'll Need

  • OEM or high-quality motorcycle coolant (ethanol glycol-based, silicate-free)
  • Distilled water (for flushing, if needed)
  • Drain pan
  • Phillips and flathead screwdrivers
  • Socket set with extensions
  • Funnel
  • Shop towels
  • Gloves & safety goggles

Instructions

  1. Let the bike cool: Always begin with a completely cool engine to prevent serious burns – coolant can remain dangerously hot long after the last ride.
  2. Remove side panels & skid plate (if equipped): Using a screwdriver and socket set, remove the panels and, if needed, the skid plate to access the radiator and drain bolt.
  3. Drain old coolant:
    • Place the drain pan beneath the water pump drain bolt (right side, low on the engine case).
    • Loosen the radiator cap to vent the system, then remove the drain bolt and washer to start draining.
    • Also disconnect the small hose at the bottom of the coolant reservoir (left side, under the left panel) to drain any remaining fluid.
  4. Flush the system (recommended):
    • Replace the drain bolt temporarily.
    • Pour distilled water into the radiator through the filler neck using a funnel.
    • Run the engine briefly (with the radiator cap off, watching for splashes), then drain again. Flush until clear, especially if the old coolant was dirty or contaminated.
  5. Refit drain bolt & fill with new coolant:
    • Install the drain bolt securely.
    • Slowly pour coolant into the radiator until it's full. Fill the reservoir to the "Full" line.
  6. Bleed air from the system:
    • Start the engine and let it idle. As the engine warms, trapped air will escape through the radiator cap opening. Top off as needed.
    • Once no more bubbles appear, reinstall the radiator cap.
    • Let the bike reach operating temperature, then shut off and allow to cool. Recheck and top up both radiator and reservoir if needed.
  7. Reinstall panels and check for leaks:
    • Inspect all hoses, the drain bolt, and the radiator cap for leaks or loose connections.
    • Reinstall bodywork securely; make sure nothing obstructs the radiator or increases heat buildup.

KLR650 Owner Tips & Notes

  • The KLR650's cooling fan will cycle even with the ignition offkeep hands clear once the system is hot.
  • Avoid using high-pressure water near the radiator fins; it can damage the core and reduce cooling efficiency.
  • Capacity is about 2.0 L (2.1 US qt) for a full change; always consult your owner's manual for precise amounts.
  • If coolant continually disappears or oil looks milky, stop ridingthis can indicate a gasket or mechanical issue that needs immediate attention.

Important Reminders

  • Always use a quality, silicate-free coolant suitable for aluminum engines.
  • Dispose of old coolant properly—it's toxic and hazardous to the environment and animals.
  • Inspect all radiator hoses for cracks and signs of age each time you service the system.

Following these steps helps keep your 2017 KLR650 running cool and strong on any adventure. For high-quality replacement parts, maintenance products, and tools – MotoSport has you covered.

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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.