Im with PhOrk on this one
when its 95+ i have under armor loose fitting tee shirts. I drench them with water for evaporative cooling and keep my sleeve vents open. I rode into Las Vegas last year it was 100 as a rolled in but the cooling worked. You have to keep the jacket venting cut down or the shirt will dry out too quickly and you'll be looking for another gas station with a clean bathroom sink.
See ya at the Pub!!
"don't I have a real dirtbike to do this on?????"