Villa V-4 250 Racer

The cylinders are angled so acute that it seems to be a square-four.

This extremely rare 250 Grand Prix (only two built) was designed by Francesco Villa the brother of world champion Walter Villa. In 1968 Francesco built a 250 4- cylinder with rotary distribution. The FIM later banned bikes with more than two cylinders, development was stopped and the bike was never raced.