Henry and Sam get the engine in the Harley Bobber restoration, try out a bike with an extra wheel in the form of a custom trike and join fans of custom bikes at the Kickback show.

Henry Cole tells the story of Triumph, the world's oldest production motorbike brand. He explores the fascinating back histories of their most iconic models including the Bonneville, the Thunderbird and the Daytona and visits the Triumph's state of the art factory at Hinckley to discover how today's bikes are built.