Heres my Frame number: 1011812
Heres my Engine number: 1011722
That matches up with this:
CB550 550 Four 1974 Frame #CB550E-1000001- Engine #CB550-1000001-
So mine is not an F or a K.
what do i tell the people that ask me when im ordering parts? is this considered a K0, because it was the first run of 550's they made?