Re: new to motorbicycling
Welcome to the forum phillymitch. I tried using a bike inter tube for a rubber shock on my beach cruiser. It didn't seem to help much. In fact the engine had a more flexing mount and seemed to shake more. However the vibrations didn't transmit to the frame. I was more worried about gas foaming in the float bowl from the vibrations.
Whatever you do make sure to use the blue locktite on the frame mounting bolts. It keeps them from coming loose.