For closure, I will update:
Fan turned on for the first time,(that I noticed) last week. I ran back to the garage, and hit it with the temp gauge and read 175 degrees. Not sure how accurate that is, though. I think I just noticed becaus i was puitting around without the helmet on scoping out a new trail. Just runs cool enough that it doesn't need to turn it on all the time.
Besides, I always turn the key off when we stop, which shuts off the fan.
I am guessing that is why I never have noticed. Thanks to all who replied. -Eric