Sorry I'm late to the Thread. Height and Leg position have a lot to do with it. I just picked up my 2018 (sold my 2006) 2 weeks ago. After a little over 1000 miles and playing around with riding position I can vouch for this. I have a 28 - 29" inseam and just under 5'7". I feel the increased heat when I stretch out, the little I can :-) as it puts my thigh closer to the bike in general. Also playing with the location of the back rest I find moving the back rest forward and sitting with my feet back on the foot board mitigates some of the heat. I have not found the heat to be excessive at any point though, even stretched out. Getting ready to leave on a trip to Big Bend, TX which will end up being around 2K miles after the side rides we have planned. Areas out there are desert, mountain desert as well as plateau with temps expected to be from 60 at night to just under 100 during the day so I will definitely be able to give a short legged view point of heat.