Ceramic coated (inside and out) catless head pipe. A few vendors sell these (got mine from Jamie at FuelMoto).
Tuner (used a PoweVision unit, again, got it from FuelMoto)
Some folks have wrapped the head pipes as well...
Ward fans (helps the engine head cooling but not your right leg...)
Wear better riding gear (over pants, or riding jeans with reinforcements in the area next to the engine) or cover your legs with gold foil...
Highway pegs set at the proper angle so air goes into your pants and keeps a cool air pocket between your skin and the heat (do not laugh, it works until a bee goes in...)
Seriously...as a first step, removing the lowers is the only way to significantly reduce the heat.