Cooling System Descriptions; System Flow Patterns - Honda Motorcycle Service Manual

COOLING
SYSTEM
SYSTEM DESCRIPTIONS
A liquid cooling system allows optimal engine operating temperature while preventing overheating and overcooling.
The coolant is pumped through the system by means of a water pump. Combustion heat is absorbed by the coolant i n the
course of its passage through the water hoses, water jacket around the cylinder, and through the cylinder head. The coolant
then passes into the radiator through the thermostat and upper radiator hose. The hot coolant is cooled by air in the course of
its passage through the radiator and is then returned into the water pump through the lower radiator hose.
SYSTEM FLOW PATTERNS
TYPICAL 4-STROKE ENGINE:
COOLING FAN
WATER PIPE
TYPICAL 2-STROKE ENGINE:
WATER PUMP
RADIATOR
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5-2
Date of Issue: Sep., 1988
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HONDA MOTOR CO., LTD.