I have got a mail from Mr. Asakawa in Ibaraki, JAPAN.
I bought it in June of 1982 but after 4 years running, I unregistered
the moto and just keep it in my garage 6 years.
After that I restored it and now I keep running.
Unfortunately, I just use it for only short touring - around 200 Km long -
in 2 or 3 times per year. So I had run only 5000Km while recent 12 years.
The total milage is still 14000Km.
Yes I agree that the first priority of CBX is running.
So I don't need any overhaul still now. This year, I setted back all exterior parts to originals. Almost parts are originals since 1982 except tires and some small things. All replaced parts are also Honda's genuine parts.