My 74' CB 550 K0 was built in 6/73' and is number 449.
Where does it say it's a CB550K0? How do you know? Let me help you. If you'd check the frame- and enginenumber, I bet its official name was 'CB550' and that directs you straight to the right addendum in not only the Shop Manual Honda CB500-550, but also the right column in the partslist. AFAIK 'K0' was never an official Honda denomination.
We, Honda owners, have invented this. It can help in our conversation. To distinguish it from
official Honda denominations like CB550K1 and CB550K2. To express it's not an official Honda denomination, I prefer to spell it CB550
(K0
).
If I limit myself to the CB550, here are all the
different models Honda has produced:
CB550
CB550K1
CB550K2
CB550K3-A
CB550K3-CM
CB550K3-DK
CB550K3-DM
CB550K3-E
CB550K3-ED
CB550K3-F
CB550K3-G
CB550K3-U
CB550K4-A
CB550K4-CM
CB550F-A
CB550F1-A
CB550F1-CM
CB550F1-E
CB550F1-G
CB550F1-F
CB550F1-ED
CB550F1-DK
CB550F1-DM
CB550F1-U
CB550F2-A
CB550F2-CM
CB550F2-E
CB550F2-G
CB550F2-F
CB550F2-ED
CB550F2-U
CB550F2-DM
CB550F2-DK
My source is the collection of the paper editions of the partlists, all on my desk. They are an
exact copy of the fiches Honda dealers had back then to guarantee that there could not be a mistake and you would get the right part.
What CMSNL or American Honda has done with this official root source, is of no interest to me. I have seen too many errors develop. For marketing reasons (read: American clientele) CMSNL was forced to give years. Sad.
Publications by
American Honda are always met by me with suspicion and I have good reasons for that.
If folks follow my simple advice: identify your bike by frame- and enginenumber -
you only have to do it once - you can't go wrong with ordering clutch plates, cables etc. As a bonus you will have all the info on paint, exact model of carbs, eventual modifications during the production period and... you can determine what previous owners must have altered.
Compare that bounty of information with: "Hi guys, can you help me, my bike, a 76 CB550 needs new... etc". As a consequence of this hundreds of posts are wasted on questions like: is it a K, is it an F?
I hope you now can see my point. Make no mistake: I am always here to help, but the best I can begin with, is to direct you to where you can find the answer yourself.