Hello all,
New member from Tucson AZ here. Acquired a 69 CB750 a few weeks ago. Its has been sitting since 1985 so its going to need some work.
I originally thought it was a sandcast motor but it looks like it is not. Frame is correct but it looks like the motor was replaced at one point.

Tank (wrinkle) and side panels are correct although they need some work. Fork ears are damaged and so is the HL bucket but I have already secured correct OEM  replacements.
Fenders appear to be correct as does the front brake. Front rim is 19, rear is incorrect and has the 16 although it has the correct markings.
Bike is mostly taken apart at this point and I have started acquiring correct OEM parts.
Not sure what I am going to do with the bike in the end. I may just get it all cleaned up and painted and then ride it until I find a correct motor but I have considered selling the full correctly assembled frame only when I am done.

Pics attached
Let me know what you guys think.

Chris