How to Change the Coolant in a 2016 Kawasaki KLX140R L 19/16
Shop parts for a 2016 Kawasaki KLX140L Dirt Bike.
If you ride a 2016 Kawasaki KLX140R L 19/16, maintaining peak performance means keeping your cooling system in top condition. Whether you bang bars on the trails or keep it mellow on the weekends, a coolant change is essential for engine health. This guide walks you through a model-specific, step-by-step process, plus tips every KLX140 owner should know.
What Makes KLX140R L 19/16 Coolant Change Unique?
The KLX140R L's air-cooled, four-stroke engine features a compact radiator and easy-access panels, making routine tasks straightforward, but owners should note the small coolant capacity and plastic radiator shrouds. Use only high-quality motorcycle coolant – never substitute with car antifreeze – and avoid over-tightening drain bolts, as the engine cases are lightweight aluminum.
Supplies and Tools You Will Need
- Fresh motorcycle coolant (pre-mixed, silicate-free and phosphate-free)
- Drain pan
- 10 mm socket or wrench
- Ratchet
- Funnel
- Distilled water (for flushing, optional)
- Gloves and safety glasses
- Clean rag
Step-by-Step Coolant Change Guide
- Let the Engine Cool Completely
Never work on the cooling system when the engine is hot – severe burns can result. - Remove Side Panel
Use an 8 mm socket to gently remove the left side panel to access the coolant reservoir (if equipped). - Remove Radiator Cap
Slowly loosen and remove the radiator cap to relieve pressure. - Drain the Old Coolant
Position a drain pan under the water pump, then remove the coolant drain bolt (usually found on the lower right engine case) with a 10 mm socket. Allow all the coolant to drain. If equipped, open the reservoir tank cap and drain the reservoir too. - Optional: Flush the System
Reinstall the drain bolt securely. Pour distilled water into the radiator, replace the cap, and start the bike for a minute. Turn off, remove the cap, and drain again. - Refill with New Coolant
With the drain bolt back in place, pour fresh coolant into the radiator using a funnel. Fill until the coolant level reaches the designated line or is visible just under the cap seating area. - Bleed Air from the System
With the radiator cap off, start the engine and let it idle for several minutes. This helps push any trapped air to the surface. Watch for escaping bubbles and top off the radiator as needed. - Finish and Inspect
Replace the radiator cap securely. If your model has a coolant reservoir, fill it to the correct line. Wipe up any spills and reinstall the side panel. - Check for Leaks and Final Top-Off
After a brief ride, let the engine cool and recheck both the radiator and reservoir levels. Top off if needed.
KLX140R L 19/16 Owner Tips
- The KLX140R L features lightweight engine cases. When reinstalling the drain bolt, use only recommended torque to avoid stripping threads.
- Always use coolant specified for off-road motorcycles – never use standard automotive coolant with silicates/phosphates that can corrode the water pump and seals.
- Check hoses and radiator fins for damage when performing a coolant change. Deformed fins can restrict airflow and cause overheating.
- Ride regularly? Inspect your coolant every few months and schedule a refresh annually for the best protection.
Keeping your KLX140R L's cooling system maintained means more fun and fewer surprises on the trail. Regular coolant changes help ensure the engine runs efficiently – and keeps your entire cooling system reliable for every ride.
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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.