Taglioni turned to fuel injection. Direct injection was tried on the 500 grand prix bike at a test session at Modena in March 1972. It was outlawed by the FIM as a form of supercharging soon after. By 1972 the racing bikes had Lockheed twin front discs with a single Lockheed rear disc. Unique leading axle Marzocchi front forks were used. In 1972 a three-cylinder 350 cc 12 valve dohc engine with a seven speed gearbox, was developed, based on a British Ricarclo engine. Fortunately for V-twin fans, it was not competitive.