It also keeps your battery from discharging, which it is doing at an alarming rate when you're at idle, and the fan is running.
I put a manual switch on my 84 VFR1000 because the fan came on very late. It worked great on that bike, but I have so far no need for it on the XX.
Oh, may I suggest you turn the bike off when at a long light, which I do often, or get yourself a carbed XX and it won't run as hot.
good luck
marty