Italemmezeta was the predecessor of Italjet, a firm established in 1958 by Leopoldo Tartarini, son of Egisto Tartarini, an Italian racer. Early machines employed MZ engines.

Apparently, the firm's name changed to Italjet in 1966. Italjet built a small number of machines for Floyd Clymer in the late 1960's utilizing Royal Enfield 750cc engines to be marketed under the Indian banner. Around 15 of these quite handsome motorcycles are believed to exist. Clymer died before the project came to fruition and the remaining 200 Enfield engines were sold to Rickman, resulting in the Rickman Interceptors.

Clymer also had Italjet build some 97 Velocette powered machines, of which about half had Venom Thruxton engines.
Italjet also built minibikes using Minarelli and Franco Morini Motori engines.

The Bologna-based designer and manufacturer of two-wheelers, Italjet, sold the complete manufacturing and distribution rights for seven of its scooter models to the Kinetic group of India in January 2007.