According to my manual, the F1 nuts are torqued to 14.5 to 18.1 lb ft. (Supplement for K1 on the Honda workshop manual)
Earlier K's use 13.7 to 15.2 lb ft.
Not sure when that changed.
Stud part numbers are the same for all models. If I get some time I will trawl through the manual and see if I can find the change, or it may be shown in Hondaman's book.
Don't take this as gospel just yet as it is possible that there is an eror in the book
