Question for Honda CB historians

[dsinned_imp]

Which was the first year for an inline four "CB" series model with EFI world wide and in the U.S.? Let's make this easier to answer, by restricting it to "air cooled" bikes only.

Hint: I think most of us here should know the answer. :-)

[Shinchan_imp]

My 1966 CB450. Of course, it was an aftermarket EFI that wasn't installed until 2015