I love the Texas hill country, it's one of the cooler locations and a wonderful place indeed, I agree around a 100'f it gets to be a bit of a puff, however the winter here in Nebraska puts it's in the barn Nov-April, so if i cant ride in the winter because it's too cold, and i can't ride in the summer because it's too hot, when can i ride it? Out on the open road it's ok but in town that rear cylinder can be a tickler, on very hot and humid days i typically take the car for a round town stuff and then go for a cruise out in the country later. I'd say 110f would be all i'd deal with, with our humidity index, but as far as comfort, i think we all agree 75f is human happiness.