If you're talking about James's bike, it's a replica of the bike from the old school anime movie Akira.

[img]https://3.bp.blogspot.com/-whgpj2_RpXE/XMlg16UnC3I/AAAAAAAAaok/6NGeYH2TfkQSJWfQ6VKqydywBe18Y4CigCLcBGAs/s1600/Mercenary%2BGarage%2BCustom%2BMotorcycle%2BWorkshop%2B%2BAkira%2BKaneda%2BBike%2BKitbash%2Bby%2BJames%2BQiu%2Bon%2BBehance%2B01.jpg[/img]