Engine
An air/oil-cooled parallel twin engine configuration was selected for its authentic uncluttered lines faithful to our heritage design. The simple, easy-to-maintain, all new 648cc engine is built for real world riding, with sufficient power to make light work of city traffic cruise effortlessly on the open road. While offering a very usable 47 horsepower at 7250 RPM and maximum of 52 Nm torque at 5250 RPM, the secret of the new 650 Twin lies in the way the power is delivered. Seamless throughout the rev range, 80% of the maximum pulling power (torque) is available as low as 2500 RPM, so that the engine delivers smooth and rapid progress without the need for constant gear changes. A single-piece forged counterbalanced crankshaft with a 270 degree firing order ensures a quintessential twin-cylinder, a deep burbling exhaust note and minimal vibrations. The use of 4-valve per cylinder increases the engine efficiency resulting in better fuel economy & performance. An under-stressed 9.5:1 compression ration means less sensitivity to variances in fuel quality, while a twin throttle-body paired to a highly precise Bosch fuel injection & engine management system gives instantaneous, predictable and smooth throttle response throughout the rev range. While the gorgeously sculpted lines of the gleaming, hand-polished aluminum engine covers hark back to a golden era of motorcycling, what makes heads turn is the sound of the engine, either at idle or at full chat, metering a steady beat, a wonderful over-run burble or a distinctive power-on-rumble.
4 stroke, single overhead cam, air-oiled, 648cc parallel twin, 47Bhp@7250rpm, 52Nm@5250rpm, 6 speed, fuel injection, digital spark ignition = TCI