Akim Merchant from California, USA, was involved in a collision with a blue Volkswagen Passat in Nicolson Square at around 4.45pm and was taken to hospital with serious head injuries.
Despite the best efforts of medical staff, he passed away on Friday evening.
A 20-year-old woman who was also involved in the collision with the vehicle suffered minor injuries.
The driver of the Passat stopped at the scene and continues to assist police with their enquiries.
Officers are again urging anyone who witnessed the collision or who has information that can assist with their investigation to come forward.
Anyone with any information can contact Lothian and Borders Police on 0131 311 3131, or the charity Crimestoppers in confidence and complete anonymity on 0800 555 111.