I just gave it a quick peak in the Clymer and look like the horn is diff cause "K" may have only 1 horn as are "F"s have 2,I do know that your "78" is the same as my "77"cause when I was looking fo new ,seemed a lot of places had them but bigg $
diff.
Hope this help and will look
again .and post IF
Theses are from Ore.Elc.
1977 CB750 F2 Super Sport
<LET THOSE WHO RIDE DECIDE><RIDE TO LIVE-LIVE FOR JESUS>
Native American from central Cal, Kickstand UP in S.W.Missouri,