Touched my engine case at a fuel stop today. You could fry eggs on that thing. Do not know if it was internal heat from the rotor or external from the exhaust, but can't believe it is a good thing.
My Polymar skid plate wraps around 1/2 the pipe and I wonder if it is contributing to the heat. Going to have to look into that.
BMW Motorrad USA customer service: "We make superior motorcycles and continue to improve them."