2021 Aprilia RS 660

Description

The 2021 Aprilia RS 660 brings race-inspired performance to the real world. Lightweight, responsive, and perfectly balanced, it delivers superbike attitude in a more comfortable, street-friendly package. Its 659cc parallel twin — derived from Aprilia’s V4 platform — packs 100 horsepower into a chassis that feels razor-sharp yet forgiving, making it just as fun on winding backroads as it is on track days.

Features

659cc Parallel Twin Engine — Compact, high-revving engine derived from Aprilia’s RSV4, producing 100 hp for thrilling mid-range power and smooth delivery.

Advanced Electronics Suite — APRC system includes traction control, wheelie control, engine brake control, cruise control, and up/down quickshifter.

Lightweight Chassis — Aluminum twin-spar frame and swingarm provide precise handling and exceptional stability.

Adjustable Suspension — Kayaba 41 mm fork and rear monoshock offer a compliant yet sporty ride.

Rider-Centered Design — Upright ergonomics, aerodynamic fairing, and TFT color display blend comfort with pure performance.

Condition

This 2021 RS 660 has 13,381 miles and runs great. It shows a few minor scratches and scuffs from normal use but no significant damage. Mechanically sound and fully functional, this bike is ready to ride — a great choice for someone who wants Italian performance without the brand-new price tag.

Technical Specifications

Engine Type: Liquid-cooled, 4-stroke parallel twin, DOHC, 270° crank
Displacement: 659 cc
Max Power: 100 hp @ 10,500 rpm
Max Torque: 49.4 lb-ft @ 8,500 rpm
Transmission: 6-speed with Aprilia Quick Shift (up/down)
Clutch: Multiplate wet, slip and assist
Frame: Aluminum twin-spar frame
Front Suspension: Kayaba 41 mm USD fork, adjustable preload and rebound
Rear Suspension: Monoshock with adjustable preload and rebound
Front Brake: Dual 320 mm discs, Brembo 4-piston radial calipers, ABS
Rear Brake: Single 220 mm disc, Brembo 2-piston caliper, ABS
Front Wheel: 17' cast aluminum, 120/70-17 tire
Rear Wheel: 17' cast aluminum, 180/55-17 tire
Seat Height: 32.3 in (820 mm)
Fuel Capacity: 4.0 gal (15 L)
Wet Weight: 403 lbs (183 kg)