For a general overview, you could do much worse than consult Wikipedia. In the words of our august chairman, “It may not be 100% accurate but it’s excellent and I am not going to knock the writer.”

For more details on the history of MZs in the UK, including more information on each of the models available, James Mather and Ray Cattle, with contributions from Dave Payne, offer comprehensive accounts of, first, the two-stroke models and, second, the four-stroke models.

There is some additional info regarding the RT125 and 150 engine kindly researched by member Brian Whitfield here.