IMO The real issue is that due to the engine layout the 2 cylinders run at different temperatures with the rear one always that bit hotter than the front one because its not in the airflow as much. So with carb bikes there is never an ideal.
On my S4 I have found that there are 2 temp sensors for front and rear cylinders and as far as I can tell the the front one just feeds the dashboard temp readout and when fans cut in but its the rear one that feeds the ECU in order to correct the fuel map.
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Roast Beef Monster!
Termignoni and Bucci - Italian for pipe and slippers!
S4 Fogarty, S4R 07T, 748, Series 1 Mirage
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