According to the manual:
The rebound Damping Adjuster settings are for riding conditions.
- Around town
- Highways or winding roads
- Rough or uneven
There is little information about assembly, except that when you install the forks you must align the 3 marks on top of the fork tube with the marks in the top yoke. It also states that both forks must be set to the same number.
I’m not sure how long you have been a club member but I do remember in one club magazine a short while ago Andy was looking to swap an original RD owners manual. He was looking for a manual for his RC in exchange. It might be worth dropping him a mail. CB1100rclub@aol.com