A Brief History of the Marque
A firm which made racing two-strokes of 50 to 125cc with disc valves and water cooling.
Bultaco won four world championships with motorcycles using engines based on the Piovaticca, often referred to as Bultaco Piovaticca.
Multiple World Champion Eugenio Lazzarini raced 50cc and 125cc Piovaticca machines from 1973 to 1976 during his 15 year career. One of these may be viewed at https://www.youtube.com/watch?v=o-J0e4uA9Dc
Sources: MC Storico Conti