12. COOLING SYSTEM GRAND DINK 125/150 Check fan motor by battery. Battery Fan Motor Thermostatic Switch CHECK THERMOSTATIC SWITCH When coolant temperature lower then 83~87 the thermostatic switch OFF. When coolant temperature over 88~92 the thermostatic switch ON. Bolts Install the fan shroud on the radiator with the four bolts. Fan Shroud Radiator 12-7