Motorcycle Repair: 1968 honda cbr 450 ko, honda cbr 450, michael honda

Question
what does ko stand for,  what are the four positions on the key

Answer
Michael, Honda uses the "K" designation to identify major design changes or variations in the bike design.  The first model was always the K0, the next generation was a K1, etc.  Usually, Honda used model year changes for updates but not always.

Regards
Rich