Used 1956 Norton Manx R11 500cc Motorcycles For Sale in Texas,TX. This 1956 Norton Manx R11 500cc is available for purchase from AMS Ducati Dallas. It is 1 of only 100 ever built and is believed to have been raced by Derek Minter. It has a completely rebuilt motor and is an excellent example of one of the most successful race bikes ever made. Please contact Jeff Nash at (214) 466-6540 with questions.