This is a highpoly model of the Drag King Raceliner bike. This piece was modeled after Jim Henderson's creation of the bike. You can find more of his work through his TRM Convertible Tanks facebook page: https://www.facebook.com/TRM-Convertible-Tanks-127056360973752/

Here is a link to a Pinterest board of the references that were used:
https://www.pinterest.com/zach9313/drag-king-raceliner-reference/