Topic: 1977 CB550K Air Filter Replacements?

[Deltarider]

I'm sorry Delta I am not familiar with the 400f set up, I thought we were discussing the 500/550?

My point is that when you look at the design of the one on the CB400F and also the one on the CB650, you could conclude that Honda had reasons to improve on the old type (on the CB550s) that maybe was not so satisfactorily... And  from what I have seen, I know it wasn't...

[Deltarider]

We are, and nobody has still said "hey this is a drop in replacement for 1977 CB550K".

Sorry I'm not able to say what you wanna hear...  I thought anybody would know David Silver. In the meanwhile FourUsTry has served you. But maybe you still want something cheaper?

[Maraakate]

No, I need to know what is the size of the big hole vs small hole.  The price is about what I expect from all these links.  Nobody has listed dimensions and emails have fallen on deaf ears.  *shrugs*

[Deltarider]

You could do some research yourself first and use a parts finder like: https://www.hondaparts-direct.com/oempartfinder?aribrand=HOM&arian=motorcycle
Enter the parts number and the program will show on what models that particular part was.
Am I right to assume that yours is a K3? What exhaust system is on it? OEM or some aftermarket 4 into 1?