How to Change the Coolant in a 2017 Kawasaki KLX110
Shop parts for a 2017 Kawasaki KLX110 Dirt Bike.
Proper coolant maintenance is essential for the reliability and performance of your 2017 Kawasaki KLX110. This guide walks you through a complete coolant change–an easy DIY task that helps prevent overheating and prolongs engine life. The process has a few model-specific notes you should know about to do the job right on this mid-size Kawasaki dirt bike.
What You Will Need
- Phillips screwdriver or 8mm socket (for plastics removal)
- Drain pan
- Fresh coolant (Kawasaki-compatible, ethylene glycol-based, pre-mix preferred)
- Funnel (optional but helpful)
- Bottle of distilled water (for flushing, if desired)
- Rags and gloves (for cleanup and safety)
Step-by-Step Coolant Change Instructions
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Allow the engine to cool completely.
Never open the radiator cap or coolant reservoir while the engine is hot. Coolant is under pressure and can cause burns. -
Remove body panels for access.
Use a Phillips screwdriver or 8mm socket to remove the left side panel, giving you access to the coolant reservoir and radiator cap (if equipped). -
Locate the coolant drain bolt.
On the KLX110, the coolant system is minimal and may not have a separate radiator drain bolt. Check the base of the cylinder for a small bolt labeled as a drain. If not present, you may need to loosen the lowest hose connection by the water pump. - Remove the radiator cap or reservoir cap.
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Drain the old coolant.
Place your drain pan beneath the coolant drain point. Remove the drain bolt–or lowest hose connection–to let the coolant flow out. Allow all fluid to drain completely. -
Flush the system (optional but recommended).
Fill the coolant reservoir and radiator with distilled water. Replace the cap, run the engine for a minute, shut off, and let the engine cool. Drain the water just as you did with the coolant. Repeat until clear water comes out. - Replace the drain bolt or reattach the hose.
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Fill with fresh coolant.
Using a funnel, pour the new coolant into the radiator or reservoir until full. Make sure to use only pre-mixed, high-quality coolant designed for dirt bikes and compatible with aluminum engines. -
Bleed air from the system.
With the cap off, gently tilt the bike side-to-side to help release air bubbles. Top up the fluid if the level drops. - Reinstall the radiator or reservoir cap.
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Run the engine and check levels.
Start the motor and let it idle until warm. Shut it down and allow to cool fully. Open the radiator or reservoir again and top off if needed. - Reinstall bodywork and check for leaks.
2017 Kawasaki KLX110 Coolant System Notes
- No external radiator: Unlike full-size motocross bikes, the KLX110 features a compact air-cooled engine, and some models may have a simpler system using a coolant reservoir rather than a full radiator. Always check your model—the above process applies to both systems, but steps may differ slightly.
- Use only compatible coolant: Avoid automotive coolants with silicates or phosphates, which can damage the engine and water pump of KLX110 models.
- Maintain proper coolant level: Overfilling or underfilling can cause running issues or overheating. Always check the level after the first ride.
Changing the coolant is one of the easiest ways to maintain the life of your KLX110, ensure reliable engine performance, and support all those MotoSport adventures for years to come.
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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.