- Welcome to the Darwin Motors Home Page, the online contact for a unique source of parts, accessories, and service for classic motorcycle enthusiasts, particularly BMW, Norton, Moto Guzzi and Eurobike riders. Here you'll also find San Francisco's exclusive Sparrow, Merlin and Gizmo electric vehicle dealership. We have an extensive stock of N.O.S., used, and reconditioned parts for BMW Boxers. We ...www.darwinmotors.com