Moto Morini

500 Engine When the 500 engine was introduced, much was expected of it. However it arrived in quite a low state of tune. Whilst there was a welcome boost in torque, power was only a little higher than that of the 350 Sport. Not only that, but the transmission had lost a ratio and was now only a five speed. Whilst it could be argued that the wide spread of torque meant that even the 250 didn't need six gears, it was part of the charisma of the bike. It was hoped by many that a Sport version of the engine would appear, with a higher state of tune and the sixth gear. Whilst the latter was incorporated in the 500 sei (six), both touring and Sport versions shared the same state of tune. Bore; 69mm Stroke; 64mm Capacity; 478.6cc Compression Ratio; 11.2:1 Max Power; 43 bhp (DIN) @ 7500 rpm Sport and Maestro (GT) Max Torque; 32 lb/ft @ 5100 rpm Max engine speed 8200 rpm Carburetor; PHBH 26 BS The last evolution of the V twin was the 501 engine (actually 507cc). With Gilladoni barrels along with many other small improvements it is arguably the best engine. Bore; 71mm Stroke; 64mm Capacity; 507cc Compression Ratio; 11.5:1 Max Power; 42 bhp (DIN) @ 8000 rpm Max Torque; 32.55 lb/ft @ 5600 rpm Excalibur RLX Max engine speed 8500 rpm Carburetor; PHBH 28 BS Back