if you are under any diplomatic status you can buy a NEW bike for export under your passport details mentioned over sales receipt and delivery challan from manufacturer.
if you are under certain private entity contract, you shall produce encashment certificate of foreign exchange and buy the bike same way with your passport details on documents.
Any cargo mover can pack and export that motor bike for you after due paper work processing. Usually bikes are packed in wooden crate in upright position without any fuel in tank. such declaration is mandatory over the box as well.
Buyer & Consignee shall be same. In order to register a motor bike in your home state please consult respective DMV.