Yamaha XZ550RJ 1982 Owner's Manual page 131

Thermo-unit (Engine temperature gauge)
Sonde thermique (Indicateur de temperature du mot,eur)
Onidad termica (indicador de temperatura <lei motor)
Thermostatic switch (Electric fan)
Commutateur de thermostat (Ventilateur electrique)
Conmutador termostatico (ventilador electrico)
Tube de derivaci6n
Reservoir tank Water pump Thermostatic valve
Vase d'expansion Pompe
a
eau Thermostat
Tanque de dep6sito Bomba de agua Valvula termostatica
Cooling system
The coolant is circulated by an impeller type
pump mounted on the right hand crankcase
and driven by a gear. The coolant is drawn by
the pump from the bottom tank of the
radiator, through the outlet pipe and
discharged into the cylinder and cylinder
head through the joint pipe. The coolant
passes from the cylinder to the cylinder head
through coolantways and after circulating
around combustion chamber jacketing enters
the radiator upper tank via inlet pipe. The
heated coolant from the engine then passes
down through the finned tubes to the bottom
tank of the radiator. These finned tubes pre-
sent a large surface area to the air and
dessipates the heat.
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