Agusta started the first three races in the 350 cc class, but withdrew from the fourth race, the GP des Nations. The MV Agusta 350 4C was considered uncompetitive and a new machine that was under development was by no means ready. Read did not finish in any race and MV Agusta remained without points in the 350 cc class. 1975 In 1975 the MV Agusta 350 cc racers were not entered. 1976 For the 1976 opening race in France, Agostini had a 350 cc Yamaha hastily brought from Amsterdam. The MV had failed the new noise limit of dB(A) (the MV was measured at 132 dB(A)). The FIM admitted, however, that this new rule had been announced too late, giving the MV Agusta a little respite. The machine almost never reached the finish. In France a stone hit the distributor cap, in Austria the clutch slipped, in Italy, Yugoslavia, Czechoslovakia and Germany, Ago stopped for unknown reasons and in Finland the ignition broke down. The organisation had even done everything there to get the MV Agusta through the noise inspection. A false statement of the team's bore / stroke ratio was then accepted, while it was still fairly well-known: 54 x 38 mm. As a result, the measurement was carried out at a specific corrected piston speed at 7,000 rpm, while that should have been 10,000 rpm. The measurement was 113 dB(A) and MV Agusta claimed a power loss of 3 hp. The only time the MV scored points that season was Agostini's win in Assen. At the end of the season, MV Agusta announced it would stop road racing. Prototypes In 1957, MV Agusta developed two prototypes for the 350 cc class, a six-cylinder and a two-cylinder. Nello Pagani rode the six-cylinder unsuccessfully in the last race of 1957, the GP des Nations at Monza. The two-cylinder was never raced. MV Agusta 350 6C 1957 The six-cylinder in- line engine was a logical development because MV Agusta built a 500 cc version in response to the Moto Guzzi Otto Cilindri. The machine provided enough power, but this did not outweigh the extra weight. The machine had a six-cylinder in-line engine with only two valves per cylinder. The air-cooled six-cylinder engine still had double overhead camshafts and a double cradle frame, the lower tubes of which could be detached for easy removal of the engine block. MV Agusta 350