Aprilia asserts dominance in the liter-and-above-sized literbike class with its carefully updated RSV4 Factory superbike. (Larry Chen/)

As opposed to radial platform changes, Aprilia engineers methodically hone the performance of its RSV4 Factory superbike. The ’21 model features new body panels and LED lighting. (Larry Chen/)

An even longer-stroke 1,099cc engine boosts midrange torque and allows the RSV4 to leap off turns. (Larry Chen/)

The RSV4 Factory benefits from Öhlins semi-active suspension and forged alloy wheels. (Larry Chen/)

Just when you think it can’t build ’em any faster, Aprilia delivers an even more powerful RSV4. It pumps out 190 ponies at the back tire. (Larry Chen/)

The Factory’s semi-active Öhlins suspenders help take the guesswork out of suspension setup. (Larry Chen/)

A lighter yet more rigid swingarm works in unison with the more powerful engine delivering astounding drive grip off turns. (Larry Chen/)

The RSV4’s and RSV4 Factory’s updated swingarm is a big deal. It boosts traction and nets improved vehicle acceleration. (Larry Chen/)

Despite weighting 439 pounds with a full tank of fuel, the RSV4 Factory is an exceptionally agile liter-and-above-sized superbike. (Larry Chen/)

The RSV4’s front fairing is broader, which better shields the rider in the tucked position. (Larry Chen/)

Few superbikes deliver a more exhilarating experience than the RSV4 and RSV4 Factory. (Larry Chen/)

The 1,099cc V-4 engine gains 1mm of piston stroke. This nets a broader powerband with incredible midrange torque. (Larry Chen/)

The taillight also has an emergency feature that flashes rapidly when the vehicle is decelerating quickly. This helps alert drivers behind you. (Larry Chen/)

Source: MotorCyclistOnline.com