Only heat issues I've experienced is in very warm weather in stop-go traffic. That propeller up front kicks in and blows steaming hot air right at me. But then I wouldn't even consider riding without serious pants on, not worth it if things go south and you drop the bike. I like my skin where it is, so while I've felt warmth on the right side, nothing major.
Though, I have yet to try to drive it in really sultry temps, don't get a lot of sultry around where I live.