This is a full top-end rebuild. How many miles did you have on the bike before this was required? How many drive chains have you gone through over the years, and how many rear tires? BTW, some Seeleys were made to accommodate a passenger.. 
The Seeley was offered to me in the early 1980s. I didn't know much about them, simply loved the look of the bike. There were no passenger pegs either, and I couldn't imagine that it was offered as a passenger bike. But then, it would probably not have been much different than the RR. My wife hated to sit in the back of the BMW.
The "complete full top-end rebuild" was in 2014. It wasn't really required until after I did it. As a result of a sweating head gasket, I measured the pistons and replacement was indicated. I kept one on my shelve.
Cam holders, cam, and valves were sold cheap to someone who was quite happy with them because they were still in god condition. There was no need to replace them but I had all this laying around new. However, I initially used flawed NOS Honda cam holders (closed oil passage from factory) although the original ones were still good. This mistake cost me the last known NOS F2 cam (try to locate one). After this disaster, another set of new cam holders along with a NOS K7 cam were installed.
Tires and drive chains are a funny thing when compared to the BMW RR. The initial drive chain didn't last very long because back then, there was a problem with the overflow from the battery, dripping acid on the chain. I caught it before the chain dissolved.
There is a service bulletin from Honda for that. After that, the chain, despite its dimensions, would last me 20,000 km before it started to lengthen unevenly. Still within specs, I would always replace at that point. The rear tire would go bad long before the front tire. It would easily last 12,000 km or more. But I always replaced early. In comparison, a rear tire for the RR would always last me 4500 km (others replaced twice by then) while the small chain of the BMW, despite the horsepower, would easily last 18,000 miles or 28,800 km.
Most of the mileage on the Honda was done with a passenger and serious luggage and in the first 15 years. After the initial oil change, I only used synthetic oil. I know, if I wouldn't have, I would have twice the mileage today.
Then, I find nothing more convincing than my own experience.
By the way: although, for every day on the road the RR spent four days in the shop, I still managed 67,000km. When I picked up my new Harley, I scheduled the 1,000 mile service three days later. I went over the mileage when I turned it in that day.
There was a long time when I did not ride much because of my children--until I could take them along with me. I have some nice pics of my kids growing up with the Honda. Now, that I see every day as a gift, I ride as much as I did back 40 years ago--but not in the same places. Some of the trips I did back then, I would only to today with a heavily armed column.
Anyway, we are voting here on the bike of the month--not the story of the month. And no doubt, the Seeley is spectacular.
Poll