Cooling system: Difference between revisions

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==Overview==
==Overview==


The Ninja 250 has a basic, fluid-based cooling system, composed of a water pump, a radiator, an electric fan, and an overflow tank.  There are also tubes which interconnect the various pieces.  Some are built into the motor as coolant passages, and others are external hoses of metal or rubber.  For a good overview of how an engine cooling system works, please see [http://auto.howstuffworks.com/cooling-system.htm this article at howstuffworks.com].  A Ninja 250's cooling system is conceptually identical to a car system, it's just smaller to match the smaller engine.
The Ninja 250 has a basic, fluid-based cooling system, composed of a water pump, a radiator, a thermostat, an electric fan, and an overflow tank.  There are also tubes which interconnect the various pieces.  Some are built into the motor as coolant passages, and others are external hoses of metal or rubber.  For a good overview of how an engine cooling system works, please see [http://auto.howstuffworks.com/cooling-system.htm this article at howstuffworks.com].  A Ninja 250's cooling system is conceptually identical to a car system, it's just smaller to match the smaller engine.


In normal operation, assuming a system in correct working order and filled with coolant, the engine will remain at the correct operating temperature almost entirely through natural convection, as air moves past the radiator.  The air moving past the radiator carries away heat, removing it from the engine.  In some circumstances, the cooling system either doesn't receive enough air, or doesn't receive cool enough air, and it will engage the electric fan.  This typically happens when the temperature is over about 80° F (27° C), or when the bike is stopped or moving very slowly.
In normal operation, assuming a system in correct working order and filled with coolant, the engine will remain at the correct operating temperature almost entirely through natural convection, as air moves past the radiator.  The air moving past the radiator carries away heat, removing it from the engine.  In some circumstances, the cooling system either doesn't receive enough air, or doesn't receive cool enough air, and it will engage the electric fan.  This typically happens when the temperature is over about 80° F (27° C), or when the bike is stopped or moving very slowly.