Well,I finally got a chance to ride the Foreman 500 with the head temp. gauge installed.I must first say I was surprised at how hot these motors get. It was in the 60's outdoors and I was driving on wooded trails mostly in 2nd. and 3rd. gear.It ran at a steady 250 degrees for the whole time.The fan did not come on at all during this time. If it's not raining this coming weekend,I'll be back in the woods putting the Foreman to work and we'll see what kind of temps. I get.