1960 Simson 425S FacebookTweetPin This striking custom is built from a 1960 Simson 425S. The motorcycle took 6th place in the freestyle class at the 2010 European Championship of Custom Bikebuilding and was built by the Hungarian firm Muce Choppers. FacebookTweetPin Related Posts Pro Street Difference | Motorcycle Roadside Chopper Roland Sands KRV5 Machine Gun Gold Awesomeness 1974 Hardtail Custom Chopper