Hold on....
BTW...Nice job you are doing.
OK, now I understand.
The photo was not oriented correctly and it took so long to load because it was 4,200 pixels wide.
It does look like a CB750!
So there should be no washer between the frame and the engine.
Maybe that black washer thing between the frame and the engine is the kickstarter rubber?
That is if one even goes there.
Please tell us Stereosilence which bike this is.
Photo below with correct orientation.
Click on the photo for large version.
Stereosilence you need to learn how to use Google. LOL..lol
You need Honda seal 91204-286-003
If the parts person at a Honda store says they do not have it tell them it also fits these models
C250 CB350 CB360 CB400 CB500 CB550 CB750.