Motorcycle coolant is a liquid used to keep the engine of your vehicle at a safe temperature.
When engines burn fuel, energy is released, but only about a third of this energy actually moves the vehicle forward - the rest is lost as heat. For this reason, it’s easy for the engine block to overheat without a cooling system in place.
In this system, engine coolant is circulated from the engine block to a radiator on the outside of the vehicle. The coolant absorbs heat from the engine, and becomes cooled as the vehicle moves, before being pumped back to the engine once again.
Most coolants are water based, since water has a relatively high heat capacity. The coolant will also contain antifreeze and anti-corrosion agents, to help prevent it from freezing in the winter, or damaging the radiator and other cooling system components.