I think you would run into an Insurance problem. The other problem is these bikes are not very replaceable. Nice idea, but has a lot of complex liability details to be worked out.
There are other companies are there that do it just not for the CB750. I would like to be able to go to different parts of the country and have a CB750 waiting for me. Maybe even go to Europe or Australia and ride an old bike. How cool would that be! Don't want to ride alone no problem I'll go with you.
I would only rent to people I trust anyhow like other forum members. GPS tracking, credit card deposit, proper insurance, and guided tours to start. Anyone want to tour the Adirondacks or fingerless this summer hit me up.
For me it would be a way to be able to keep my collection way into the future while letting others experience the feeling you get from ridding one of the coolest vintage bikes ever made. New bikes are more like a car on two wheels IMO. No feeling or soul, they are too perfect.
A few members from overseas have talked about coming here buying a cb750 and going on tour. Why not rent one for a fraction of the price. Who knows instead of sending them overseas via Ebay we can keep them in the USA.