GILROY, Calif. -- When the gleaming reincarnations of Indian Motorcycles rolled off the factory floor four years ago, enthusiasts wondered whether the new machines would recapture the glory of the vintage line that had ceased production nearly a half-century earlier. Now they have their answer: The Indian Motorcycle Co. announced on Monday that it had sputtered to a halt and was stopping production in its factory in Gilroy, Calif. It is laying off about 380 workers, virtually the entire staff. The move means that the Indian brand will once again be relegated to the halcyon memories and oil-stained garages of...