There are roughly a gazzillion posts on this site complaining about heat on the riders legs. And they aren't all just about 110's, there were plenty from the 103 days as well. Excuse my lack of tact, but I have to ask just what the heck people expected when they bought a big air cooled V-Twin dinosaur with a totally exposed engine and exhaust system sitting within inches of certain tender parts of their bodies.
Here's an experiment for those who think this heat thing is somehow unique to their motorcycle. Take your car/truck/SUV etc for a nice 20 mile drive on a hot day. Pull off the road, pop the hood, and crawl up on top of the engine and sit there for as long as you can. Come back and let us know how it went. OR, instead of sitting on top of the engine just slide under the vehicle and cozy up to the catalytic converter.
Now that you've proved that those other vehicles are also hot enough to cause pain and severe burns, take a look at the one major difference between them and your Harley. The auto folks isolate and insulate the people from the heat sources. Harley prefers to put no barrier at all between the rider and the heat sources. DUH! It's all about style and tradition guys. You could have bought a motorcycle with an enclosed engine and well shielded exhaust system, but you chose the one with the hot stuff nearly touching you because it looks "cool". You make your choice and you get to live with the results, and there is no magic wand. You could try aluminum foil heat shields for your pant legs though.
Jerry