There was a Guy making a similar powered bike in Northern California with the motor in the same position and driving through the cranks.
I doubt if he is still around.
sells a set up kind of like yours and sold one called a bimoto?? or something like that.
I have a Robin Subaru 35cc and a Honda GX 31 and have ridden Honda GX 35's.
Would like to see better pics of the bike and much more scantily clad pics of the woman!