Ok, they are hot. Not to put too fine a point on it, but I feel like I hafta quote Homer Simpson: DUH. Internal combustion, that's like fire, it's hot....
Anyway, now there is apparently a group suing Harley because the engine is hot. Here is the link to an article on an HD forum.
Things Getting Hot for Harley-Davidson's Air-Cooled Engines - HDForums.com Harley Davidson Forums
I am going to refrain from any comment at all about the legal part.
But I am wondering exactly what anyone proposes in connection with the comment that it is possible that "other sympathetic judges may determine that such high operating temperatures are in fact design defects and hence affect not only future engine production, but retroactively demand updates to existing H-Ds via mandatory recalls." What exactly would they propose as a "retroactive update"???