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Aprilia RS660

Aprilia is looking to rekindle interest in the middleweight sport bike category by introducing the 2021 RS660.

The Aprilia RS660 is a new, lightweight supersport machine that features an all-new 659 cc parallel twin based on the company’s 1,078 cc V4, sharing the larger engine’s 81 mm bore but with a longer stroke (63.9 mm versus 52.3). The RS660’s engine features a 270-degree crankpin layout and claims 98 horsepower (73.5 kW) and 49 ft-lb of torque. The engine is used