Page 1-10 clearly requires 383 ccm for SW and SP forks. Or 145 mm if that's easier.
The hole is the oil drain hole. A.f.a.i.k. there is nothing to bleed on a fork.

I too was suprised that there is so little in the manual about fork dis/assembly. The Japanese manuals aren't very good at that, I found that the English manuals (if available for a model) are a lot better.