Excelsior 250 cc Racer. Frame engine is 1938 Engien and Spare Engine are 1936 The last owner had the bike for 26 years. The owner before Dr. Helmut Krackowitzer. magnesium Gearbox. Magnesium Brake plates. no engine number. Piston has a hole, replacement piston and spark plugs come with the bike. some engine spare parts from a 250 cc engine come with the bike