Sōichirō Honda - 本田 宗一郎17-11-1906 - 05-08-1991
If you don't have a "secret key", then you do not have to enter anything there.
Tagged in 1982, 1983, xl250r
workshopmanual-xl250r_1982-1983-30072019-1434.pdf
Workshop Manual for Honda XL250R (1982-1983)