Mine runs +200F in slow traffic.
The OEM switch that I swapped out of the 748 was marked 87/92C (=189/198F). I'm assuming that this is the off/on temps that the fan should come on.
I swapped the OEM switch with a low temp switch sold by Evoluzione (Motowheels sells the same switch) that's marked 79/88C (=174/190F).
I haven't yet been in slow traffic to gauge the difference, but just sitting in the garage, the engine doesn't get much over 200F before the fan turns on.