Negative red leader, my speedo has not fogged up. I recently swapped my stock speedo out for the nostaglia faced speedo, it too has not fogged and works fine. I know this doesnt help. (BTW I have an 07 RKC)
not my speedo or tach but my other gauges have.
I wrote to HD MOCO about it. They said fogging is not covered under the warranty.
But funny thing is I can't find that in my warranty of things not covered!