A friend of mine was given this by a bloke he knows.The purchaser bought it for one of his kids,but never saw it running.(???)see http://www.motorcyclenews.com/mcn/bikereviews/searchresults/bike-reviews/sachs/sachs-madass-125-2005-current/
see http://www.way2speed.com/2012/12/sachs-madass-500-concept.html#axzz2zFyJcu00
PS:Straight away I named it for him.He said I was the only person ever to hear of it.