It would be easier to build a motorized mountainbike or get a scooter like repobike said.
You're right. I looked into it further and these are the only ohio moped requirements.
The Ohio Revised Code defines a moped, or motorized bicycle, as any vehicle with two tandem wheels or one front and two rear wheels which is capable of being pedaled. The tires shall have an inflated width size of 1.75 inches (4.45 centimeters) minimum and shall have an overall inflated diameter of 19 inches (48.26 centimeters) minimum when mounted to the rim or wheel. The moped should be equipped with a helper motor too. The helper motor may not:
have a piston displacement of more than 50 cubic centimeters;
produce more than one brake horsepower; and
propel the vehicle at a maximum speed greater than 20 mph on a level surface.
I probably wouldn't be able to make the pocketbike legal because the wheel must be able to be petaled anyways. I would still like to possibly put on different wheels that arent meeting the 19in requirement....
Is that even possible?