I was wondering what the most popular accessory added to a CB1100 and the most popular modification done to a CB1100?
On the accessory question my guess would be adding a fairing or windscreen of some type followed by a new seat. Both are pretty common changes on any new bike.
As far as modifications on our models I would say " RLETS "

Hmm...
RLETs
Seat
Fairing
Exhaust