The lower fairing is the same, the upper fairing is not interchangable. The RD fairing is actually quite a bit shorter in length than the RC.
So NO! the upper fairings on the C and D will not interchange, but possibly with a RC frame you could get the RC fairing on an RD .. but dimensions
around the clocks would all be wrong so I imagine it would look like a right dogs breakfast 😮
It appears even Honda got this Fairing stay wrong.
I have a photocopy of the parts book copied for club members which originally stated the RC and RD fairing stay have the same part number; however this has been corrected by someone stating ERROR in big letters.
That was me!!! My first 1100R was a crashed RD which I rebuilt but the top fairing that I bought was an RC one – so the solution to fit it was to buy an RC fairing frame and give it an RC top fairing but painted as an RD.
I guess that the bike must still be around somewhere….??
And that’s why I didn’t have any issues with clocks or whatever.
When I did the original Parts book for the Club, I remember making this correction and price note.