A collection of photos, interviews, choppers, and drag bikes tell the story of African American motorcycle culture in a new exhibition at the California African American Museum.  The California-focused exhibition explores the little-documented world of black motorcycle enthusiasts and their influence on motorcycle riding, design, style, and technical innovation.  The exhibit features L.A. and Oakland-based black motorcycle clubs and drag bike racers and designers such as Ben Hardy, the man behind the iconic bikes in Easy Rider.