The Aprilia RS 660 has quickly become a standout contender in the competitive middleweight sport bike segment, impressively balancing exhilarating performance with everyday practicality. This Italian-crafted motorcycle is designed for riders who desire the aggressive styling and dynamic capabilities of a sport bike without compromising comfort, usability, or safety. By fusing a powerful yet manageable engine with cutting-edge electronics and a lightweight chassis, the RS 660 offers an engaging riding experience that appeals to both experienced enthusiasts and newcomers alike.

Engine and Performance

At the heart of the RS 660 lies a 659cc parallel-twin engine that is both sophisticated and versatile. This compact, liquid-cooled powerplant delivers approximately 100 horsepower at 10,500 rpm and 67 Nm (49 lb-ft) of torque at 8,500 rpm, striking an ideal balance between spirited acceleration and everyday rideability. Unlike some larger, more aggressive sport bikes that can be intimidating for less-experienced riders, the RS 660’s engine offers a smooth, linear power delivery that encourages confidence and control.

The engine’s compact design not only reduces overall weight but also contributes to a narrow profile, which aids in rider ergonomics and maneuverability. Featuring dual overhead camshafts and four valves per cylinder, the RS 660’s engine is engineered for high-revving performance, while its ride-by-wire throttle system enhances precision and responsiveness. Additionally, Aprilia has incorporated a counter-rotating crankshaft, a technology typically found on high-end superbikes, which helps reduce inertial torque and improves agility by allowing quicker changes in direction.

Paired with a six-speed gearbox and an assist-and-slipper clutch, gear shifts are smooth and quick, enabling aggressive downshifting without rear-wheel hop and providing a more immersive riding experience. The slipper clutch also reduces rider fatigue during spirited rides, especially in twisty road conditions or track scenarios.

What truly sets the RS 660 apart in terms of performance is its lightweight design. Weighing in at just around 183 kilograms (wet), the bike’s chassis and suspension components are optimized for agility and responsiveness. This low weight contributes to nimble handling and rapid directional changes, making the RS 660 feel lively and engaging on both tight corners and open highways. Riders will appreciate how easily the bike can be flicked between bends, complemented by its balanced weight distribution and low center of gravity.

Real-World Riding Experience

On the road, the RS 660 shines as a versatile machine capable of tackling a variety of riding environments. In urban settings, its light weight and responsive throttle make it easy to navigate through traffic and tight spaces, while its smooth power delivery ensures predictable acceleration without overwhelming the rider. For weekend backroad rides, the RS 660’s chassis and suspension deliver precise feedback, inspiring confidence when leaning into corners or accelerating out of bends.

For riders interested in occasional track days, the RS 660’s performance-oriented capabilities and advanced electronics—discussed in greater detail below—allow for spirited riding while maintaining a degree of safety and control. This makes the bike an excellent choice for sport riders who want a machine that can double as a daily commuter and a weekend track tool.

Advanced Electronics and Rider Aids

One of the most compelling aspects of the Aprilia RS 660 is its comprehensive suite of modern electronics that elevate both safety and performance. Aprilia has leveraged its racing heritage to equip the RS 660 with sophisticated rider aids that were once reserved for premium superbikes, making these technologies accessible to a wider audience.

Riding Modes

The RS 660 offers multiple riding modes that adjust throttle response, power output, and electronic intervention to suit different riding scenarios and rider preferences. The standard modes typically include “Sport,” “Track,” and “Rain,” each providing varying levels of power and traction control. For example, the Rain mode delivers smoother throttle inputs and heightened traction control intervention for slippery conditions, while the Track mode maximizes power delivery and reduces electronic intervention for experienced riders on closed circuits.

Traction Control and Cornering ABS

Traction control on the RS 660 is fully adjustable, allowing riders to select the level of intervention or turn it off entirely if desired. The system uses sensors to monitor wheel speed and adjusts engine power to prevent wheel slip during acceleration. Complementing this is the bike’s advanced cornering ABS system, which uses an inertial measurement unit (IMU) to monitor lean angle and modulate braking pressure accordingly. This technology enhances safety by preventing wheel lock-up even when braking hard into corners, giving riders added confidence on variable road surfaces.

Quickshifter and Cruise Control

The RS 660 features a bi-directional quickshifter that enables clutchless upshifts and downshifts, facilitating smoother and faster gear changes during aggressive riding. This feature not only enhances performance but also reduces rider fatigue, particularly on longer rides or in stop-and-go traffic. Additionally, the bike is equipped with cruise control, a rare feature in this class, which adds comfort for highway cruising by maintaining a steady speed without constant throttle input.

Full-Color TFT Display

An intuitive 5-inch full-color TFT display provides clear, customizable information including speed, rpm, gear position, fuel level, riding mode, and more. The display integrates with smartphone connectivity options, allowing riders to access navigation prompts, incoming calls, and music controls without distraction. This modern interface contributes to a safer, more connected riding experience.

Chassis, Suspension, and Braking

The Aprilia RS 660’s chassis architecture is a crucial element in delivering its balanced performance and handling characteristics. Constructed from lightweight aluminum twin-spar frames, the bike offers rigidity and stability while maintaining a low overall weight.

Suspension

The front suspension utilizes a fully adjustable 41mm upside-down fork made by Kayaba, allowing riders to tailor compression and rebound damping according to their preferences and riding conditions. At the rear, a monoshock with adjustable preload and rebound provides balanced support and comfort. This suspension setup ensures the RS 660 remains stable and composed during aggressive cornering, yet compliant enough for everyday riding comfort.

Braking System

Stopping power comes from dual 320mm front discs with radially mounted Brembo calipers, paired with a 220mm rear disc. Brembo is renowned for its high-quality braking components, and their inclusion on the RS 660 ensures strong, consistent braking performance. The integration with cornering ABS further enhances safety and control during both straight-line and lean-angle braking scenarios.

Design, Ergonomics, and Practicality

Styling is an important factor in the RS 660’s appeal, and Aprilia has done an excellent job blending aggressive sport bike aesthetics with functional design cues. The bike’s aerodynamic bodywork reduces drag and enhances high-speed stability, drawing inspiration from Aprilia’s MotoGP racing heritage. Sharp lines, twin LED headlights, and compact mirrors contribute to an aggressive stance that catches the eye.

Ergonomics

Unlike many pure supersport motorcycles that adopt an aggressive, race-oriented riding position, the RS 660 offers relatively comfortable ergonomics for its class. The seat height is set at a moderate 820mm (32.3 inches), making it accessible to a wide range of riders. The handlebars and footpeg placement strike a balance between sporty posture and comfort, enabling longer rides without excessive strain on the wrists or back.

Practical Features

  • Fuel Capacity: The 14-liter fuel tank provides a respectable range, making the RS 660 practical for daily commuting and weekend adventures.
  • LED Lighting: Full LED lighting enhances visibility and energy efficiency, improving safety during night or adverse weather riding.
  • Storage Options: While the RS 660 doesn’t come with integrated storage compartments, its compact size allows for easy mounting of aftermarket luggage solutions for touring or errands.

Comparisons and Market Position

In the crowded middleweight sport bike category, the Aprilia RS 660 competes with models such as the Yamaha YZF-R7, Kawasaki Ninja 650, and KTM RC 690. What sets the RS 660 apart is its combination of a high-performance engine derived from Aprilia’s racing technology, advanced electronics suite, and a chassis tuned for both agility and everyday usability.

While bikes like the Yamaha R7 emphasize a more race-track focused approach and the Kawasaki Ninja 650 leans towards budget-friendly versatility, the RS 660 offers a premium feel with features often found in higher-end machines. Its price point reflects this positioning, appealing to riders looking for a step up in technology and performance without jumping to liter-class superbikes.

Maintenance and Ownership Considerations

Maintaining the RS 660 is generally straightforward, with Aprilia providing a well-documented service schedule and relatively accessible components. Regular maintenance intervals include oil changes, valve clearance checks, and chain adjustments, similar to other middleweight sport bikes. The bike’s modern electronics may require specialized diagnostic tools for troubleshooting, but authorized Aprilia service centers are equipped to handle these needs.

Owners report that the RS 660’s build quality and reliability are strong, though, like any sport bike, proper care and timely maintenance are key to ensuring longevity. The availability of genuine Aprilia parts and aftermarket upgrades also allows riders to customize or enhance their motorcycles over time.

Conclusion: The Aprilia RS 660 as a Balanced Sport Bike

The Aprilia RS 660 successfully bridges the gap between aggressive sport bike performance and practical, everyday usability. Its 659cc parallel-twin engine delivers a compelling mix of power and smoothness, while the lightweight chassis and advanced electronics provide agility and rider confidence. Whether you are an experienced rider seeking a nimble middleweight machine or a newer enthusiast looking to step up from an entry-level bike, the RS 660 offers a well-rounded package.

With its combination of Italian design flair, racing-derived technology, and thoughtful ergonomics, the RS 660 stands as a compelling option in the middleweight sport bike market. Its versatility makes it equally at home on city streets, winding country roads, or track days, offering a rewarding ride without sacrificing comfort or safety. For those considering a motorcycle that balances power and practicality, the Aprilia RS 660 deserves serious consideration.