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Simple and Quick Steps to Flush your Motorcycle Coolant
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Simple and Quick Steps to Flush your Motorcycle Coolant

Conducting crucial procedures on a water-cooled internal combustion engine to maximize the performance and life of the bike can be considered as a very significant step undertaken by any rider. The cooling system of any motorcycle is very important as it stops the engine from being destroyed and overheating. Replacing your coolant and draining it with a new fluid is one of the most straight-forward jobs you can do on your bike that requires very little expertise, time and effort. Anti-freeze solutions and Glycol based coolant can cause serious accidents when spilled on the race track surface and also is very difficult to clean up.

These coolant products do not freeze which results in impeller housings and resulting in cracked blocks as the coolant shifts from liquid to solid during a freeze. The life of the engine is extended by reducing the operating temperature of the engine that allows maximum performance output to be achieved. All these issues can be addressed by a Cooling system which results in less corrosion to build up in the system and the system will function more efficiently.

When Should You Replace Motorcycle Coolant?

It is advised to replace the engine coolant after 15,000 miles or after two to three years. People who live in extremely cold locations need to change the coolant twice a year. One will need a coolant with antifreeze specifications during Winter. During Summer, one will have to replace it with Water Wetter (that will reduce boiling point) and mix it with distilled water. If one goes racing regularly then the coolant is to be replaced after two to three years. There are many racing organizations that restrict the use of glycol based coolants that can cause serious accidents. It is advised to replace it with distilled water.

What will you need?

Replacement Coolant


Container and Distilled water (to capture drained fluids)


How to Replace and Flush Motorcycle Coolant?

Step 1) Begin by removing the reserve tank and fairings to access the radiator cap. Now locate the drain bolt which is generally located towards the lower portion of the impeller cover. The drain bolt also has a copper washer that helps for the quick identification. One can also refer the user manual in case of any confusion.

Step 2) Back the drain bolt out till the time you see the coolant is draining from the engine steadily. The pressure in the system is equalized by removing the radiator cap which allows the coolant to drain very quickly. Once the stream of the coolant is slowed then tighten the drain bolt with the fingers.

Step 3) Pour the demineralized or distilled water into the radiator and back the drain bolt back again. This will allow the fresh water to drain out easily into the drain pan. This will help to flush the residual and dirt that are trapped in the cooling system. Turn the engine of the bike so that the distilled water is circulated through the system.

Step 4) Now drain out the coolant that consists of any dirt or residual from the reservoir tank. Make sure that the old coolant is empty in the reserve tank by removing the drain hose. Once the process is completed then reconnect the drain hose.

Step 5) Measure the volume of the drained coolant and compare it to the specification by referring the user manual. To reduce the engine operation temperature, run a water-rich mixture in the cooling system. Now fill the system with a new coolant.

Step 6) After filling it with a new coolant mixture, put back the coolant and radiator reservoir caps. If any other part of the bike is removed during the process then reinstall it back.

Step 7) Start the engine and keep a check whether the coolant system is working properly. Also, check all the areas of the cooling system such as radiator cap and drain bolt to ensure that there are no leaks. Clean the excess coolant with a piece of rag that made its way onto the tires to avoid any accidents.

You are done by following these simple steps. Make sure that the old coolant is disposed of properly as it contains many chemicals. A recycling station is the best place where it can be disposed properly avoiding any hazards.

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