How to Change the Coolant in a 2009 Kawasaki KLX140R L 19/16
Shop parts for a 2009 Kawasaki KLX140L Dirt Bike.
If you own a 2009 Kawasaki KLX140R L 19/16, keeping the cooling system maintained is vital to ensure reliable trail performance – especially since this model features an air-cooled engine with an auxiliary cooling circuit, making coolant condition all the more critical. Follow this step-by-step guide from MotoSport to change your coolant confidently and keep your KLX spirited and safe for every ride.
What Makes the KLX140R L 19/16 Unique?
- Large wheel package: The 19/16 wheel configuration lifts seat height and gives better trail clearance.
- Simple access panels: The side cover and fuel tank cover are designed to be removed easily for routine maintenance like coolant changes and battery access.
- Accessible drain bolt: The drain plug for the cooling circuit is straightforward to reach near the water pump.
Tools & Supplies Needed
- 10mm socket and ratchet
- 8mm socket (for side cover/fuel tank shrouds)
- Coolant suitable for motorcycles (premix or distilled water with compatible antifreeze)
- Drip pan for old coolant
- Funnel
- Clean rags
- Safety gloves and glasses
Step-by-Step Coolant Change Guide
- Let the bike fully cool. Never open the cooling system when the engine is hot – serious burns can result.
- Stabilize the bike. Park on a level surface with the bike upright, using a stand if available.
- Remove side cover & fuel tank shroud. Use an 8mm socket for the shrouds. Both the right side panel and left side will need to be loosened for easy radiator cap access.
Tip: Removing the side cover also gives you access to the overflow reservoir. - Locate and remove the radiator cap. Release slowly to let any pressure out first.
- Position the drain pan under the water pump.
- Remove the water pump drain bolt. Usually a small bolt located on the lower water pump cover. Allow all old coolant to drain out fully.
- Optional flush: For best results, add distilled water and replace the drain bolt briefly, then let it run through the system and drain again.
Do not use tap water, as minerals can cause corrosion in the system. - Inspect coolant hoses and seals. The KLX140R L's cooler is compact; check hose condition for cracks or leaks before reassembly.
- Reinstall the drain bolt securely.
- Refill the cooling system. Use a funnel to pour in new motorcycle-specific coolant. Fill to just below the neck of the radiator cap opening.
- Bleed air from the system. Gently rock the bike, or start and idle the engine for a minute with the radiator cap off, topping up as needed until all air escapes and the coolant level stabilizes.
- Replace the radiator cap securely.
- Check and top off the overflow reservoir. Fill to the indicated mark.
- Reinstall the shrouds and side covers.
- Final step: After the first ride, check coolant levels again and inspect for any leaks.
Important Notes for 2009 KLX140R L Owners
- This bike's compact cooling system means even slight airlocks can cause overheating – always ensure the system is fully bled of air.
- The radiator fins are exposed and susceptible to clogging with dirt or mud. Take a moment during coolant changes to gently clean the radiator face.
- Never substitute automotive or universal coolant not rated for motorcycles, as they may harm seals or engine metals.
By following this guide, you will enhance the reliability, power, and lifespan of your KLX140R L 19/16. For any replacement parts, fluids, or accessories, make MotoSport your first stop in getting the most out of your trail machine.
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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.