How to Change the Coolant in a 2018 Kawasaki KLX140R L 19/16
Shop parts for a 2018 Kawasaki KLX140R L Dirt Bike.
Replacing the coolant in your 2018 Kawasaki KLX140R L is essential maintenance that keeps your engine performing at its best and prevents overheating. The KLX140R L, with its specific radiator capacity and compact engine, benefits greatly from regular coolant changes, especially if ridden hard or in hot conditions. Below, you'll find a MotoSport-exclusive, straightforward guide tailored for your exact MMY dirt bike.
Before You Begin
- Work with a completely cool engine to avoid burns and ensure accurate coolant levels.
- You will need: a drain pan, ratchet set (often 8mm and 10mm sockets), funnel, quality coolant for motorcycles, and distilled water for flushing if needed.
- Ensure your working area is well-ventilated and the bike is upright and secure.
Step-by-Step Coolant Change Process
- Remove the side panel (typically with an 8mm socket) to access the overflow reservoir near the rear of the radiator.
- Remove the radiator cap by pressing down and twisting. Never do this when the system is hot due to pressurized steam risk.
- Locate the coolant drain bolt at the lowest point on the water pump cover. Place your drain pan underneath and carefully remove the bolt. Allow all old coolant to drain completely.
- Flush the system (if needed): If the coolant is dirty or unknown, reinstall the drain bolt, fill the radiator with distilled water, run the engine for a few minutes, and drain again. Repeat if necessary for a thorough flush–do not use plain tap water due to mineral content.
- Refit the drain bolt and be sure it is secure before refilling.
- Carefully add fresh coolant to the radiator. Pour slowly, allowing air pockets to escape. Squeeze the hoses by hand to help "burp" trapped air from the system–this is especially important for the KLX140 models due to their compact cooling passages.
- Fill the radiator to the indicated level (or near the top if no mark is present).
- Start the bike with the radiator cap off. Let it idle for 1-2 minutes to circulate coolant and further purge air. Top off coolant as needed during this process.
- Reinstall the radiator cap securely. Be sure it is locked in place.
- Fill the overflow reservoir to the "Full" mark. Do not overfill.
- Reinstall the side panel.
- Run and re-check levels after a short ride. After your next outing, inspect both the radiator and overflow reservoir–top off with coolant if needed.
Kawasaki KLX140R L Owner Tips
- The KLX140R L cooling system is relatively small, so use only the recommended amount and type of coolant–excess or wrong coolant can impact cooling efficiency.
- This model's radiator cap can sometimes stick with age. Use steady, even pressure to remove and reinstall it.
- Inspect hoses and clamps for wear. Given the off-road focus of the KLX140R L, leaks or cracks are more likely if you ride in rough terrain.
- Replace coolant at least once every two years, or more frequently in demanding conditions.
Proper coolant maintenance ensures your 2018 KLX140R L stays cool under pressure, so you can keep enjoying the trails with confidence.
Related Shopping Categories
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Shop Tools for a 2018 Kawasaki KLX140R L Dirt Bike.
Shop Radiator Hoses for a 2018 Kawasaki KLX140R L 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.