K-Tech RAZOR-R Shock Absorber for Aprilia RS 660 (2020–2026) – Part 279S-020-010-010

Drop-in upgrade, daily-ready performance: the K-Tech RAZOR-R shock absorber transforms the Aprilia RS 660's rear suspension from adequate to genuinely capable, whether you're threading your way through morning commutes or exploring a favourite back road on the weekend. Designed as a direct replacement for the standard unit on all RS 660 models from 2020 to 2026, part number 279S-020-010-010, it brings a level of adjustability and consistency that most riders will notice from the very first corner.

Key Features

• 12-click compression and 10-click rebound adjustment let you dial in the damping for your weight, luggage load and preferred riding style without specialist tools.
• Nitrogen (N2) charged internals maintain consistent damping force across all temperatures and eliminate the fade caused by oil aeration during spirited riding.
• Spring preload and body length adjustment (–1 mm / +9 mm range) allow precise ride-height and sag setting to suit different riders and road conditions.
• Dedicated 46-150-140 spring rated at 140 N/mm delivers well-matched compliance for road use, with alternative spring rates available from K-Tech for heavier or lighter riders.
• 35 mm damper body with a 14 mm shaft and eye-to-eye mounting hardware (23 mm wide, 10 mm bolt diameter, both ends) mirrors OEM dimensions for a straightforward swap.
• A clean, purposeful finish complements the RS 660's modern aesthetic without looking out of place on a road-registered machine.

Designed for Real-World Riding

Where the standard Aprilia RS 660 rear shock offers minimal adjustment and can feel overwhelmed on faster, more technical roads, the RAZOR-R gives you genuine control. The 12-position compression circuit manages how quickly the suspension absorbs bumps and braking forces, while the 10-position rebound circuit governs how rapidly it returns — keeping the tyre in contact with the surface and the chassis settled through successive corners.

The 308 mm extended length and 55 mm stroke match the original geometry exactly, so there is no need to alter brake lines, linkages or any other chassis components. Preload is adjustable by 5 mm and the overall body length can be varied by up to 9 mm, giving you genuine control over static ride height and corner-entry balance. The 10 bar nitrogen charge remains stable over extended mileage, meaning the shock performs on the last mile of a long tour in the same way it does on the first.

Build Quality and Specification

K-Tech manufactures the RAZOR-R at its UK facility to tolerances more commonly associated with bespoke race suspension. The 35 mm RCU housing and 14 mm shaft are produced from high-grade materials and finished to resist corrosion over years of road use. Internally, the valving is optimised specifically for the RS 660's weight and linkage ratio, rather than being a generic catalogue unit adapted to fit. The 4 mm RCU adjustment travel provides a usable window for fine-tuning once the coarser click settings have been established.

Installation is straightforward in terms of hardware — the eye mounts at both ends accept the original 10 mm bolts — but K-Tech recommends that fitting is carried out by an authorised K-Tech Service Centre, as correct preload setting and torque values require appropriate tools and suspension knowledge to ensure full performance and safety.

Fitment and Compatibility

This shock absorber is designed specifically for the Aprilia RS 660 across all model years from 2020 to 2026. No modification to the original mounting points or linkage is required.

• Aprilia RS 660 (2020)
• Aprilia RS 660 (2021)
• Aprilia RS 660 (2022)
• Aprilia RS 660 (2023)
• Aprilia RS 660 (2024)
• Aprilia RS 660 (2025)
• Aprilia RS 660 (2026)

Specifications