I'm no legal expert, but I thought you didn't need a title in Ohio for a bike
this old (1973).
I have three CBxxx bikes from 1978, and I think all I had for them was bills of
sale, and out-of-state registrations which I took to OH-DMV to get them
registered.
But that may have been because I moved them here from a state that didn't issue
titles for bikes that old...

All I did was take the bikes, the bills of sale, and the out-of-state
registrations to OH-DMV, where the clerk came outside to verify VIN numbers,
then issued OH registrations.
I'd have to check the safe deposit box to be sure, but I don't think I've ever
had titles for any of the three.
I may have told the clerk, "My old state didn't issue titles for bikes this
old." But there wasn't any problem or delay at OH_DMV.