Britain's Prince William and his brother Harry with instructor Mike Glover, on the eve of their charity motorcycle ride. Photo by AP.
The princes are among more than 80 riders taking part in a gruelling eight-day, 1610km adventure.
Dressed in helmets, goggles and protective gear, the princes revved the engines of their red Honda bikes at the race's deafening start today.
People cheered the bikers on as they left the holiday resort of Port Edward on South Africa's southeast coast and hit the winding road. The race ends in the southern coastal city of Port Elizabeth.
Funds raised through the princes' participation will be divided among Unicef, the Nelson Mandela Children's Fund and Sentebale, a charity established by Prince Harry.
