2021 Aprilia Tuono 660

2021 Aprilia Tuono 660 slots in as the naked-bike sibling to the RS 660, giving Aprilia a middleweight streetfighter aimed at riders who want sportbike DNA without committing to a full fairing and a racetrack-only riding position. The parallel-twin engine with its 270-degree crank gives the bike a lumpy, characterful pulse that mimics a V-twin more than a typical inline twin, and it rewards riders who like to work a bike through corners rather than just point it down a highway. Power delivery is approachable but far from soft, making this a bike you can ride hard on a Sunday and commute on Monday without feeling like you're wrestling a superbike. The 2021 model carried over without significant mechanical changes from the prior year — buyers comparing it to a 2020 example should focus on mileage, service history, and condition rather than spec differences, though 2021 was effectively the launch year for the platform. Expect interest from riders trading up from 300-400cc bikes or downsizing from liter-class nakeds who want real performance without the insurance bill or the intimidation factor.