K-Tech DDS Closed Cartridge Fork Kit – Aprilia RSV4 / R / RR (2011–2018) – 155-011-010-025

Rebuilding your Aprilia RSV4's forks with the K-Tech DDS Closed Cartridge Kit transforms everyday street riding and track days alike, delivering the kind of precise, consistent damping that usually demands a full custom service every weekend. Engineered to drop straight into the RSV4 / RSV4 R / RSV4 RR and related Tuono V4 models, part number 155-011-010-025 gives you serious, adjustable suspension without sacrificing the day-to-day usability that keeps your bike on the road.

Key Features

• Direct Damping System (DDS) with a 20 mm piston and 31 mm pilot piston generates a high oil-flow rate for genuinely precise damping control across the full speed range.
• Asymmetric damping circuits keep performance stable under extreme conditions — from fast-road use to BSB-level competition — without fade or inconsistency.
• Patented cavitation-elimination design, combined with high oil volume and faster response time, produces a noticeably sharper, more planted feel through corners.
• 30 clicks of both compression and rebound adjustment, plus 18 mm of preload adjustment, let you dial the setup to your weight, tyre choice and riding conditions without specialist tools.
• Race-proven at the British Superbike Championship and the Isle of Man TT — technology that works just as well on your morning commute as it does over Bray Hill.
• 36-260 series spring supplied; all key dimensions engineered to OEM fork tube specifications for a clean, straightforward fitment.

Build Quality and Performance

The DDS architecture replaces the standard shim-stack cartridge with a closed system that keeps damping fluid under consistent pressure throughout the stroke. Where a conventional cartridge can cavitate under repeated hard braking or high-frequency inputs, the K-Tech unit maintains oil continuity — so the damping force you set on the clicker is the force you feel at the wheel, every time. The 125 mm stroke and 692 mm overall length are sized specifically for the RSV4 fork leg, meaning there is no compromise on full travel or geometry.

Compression and rebound adjustment is separated, each offering 30 clicks of meaningful range. The suggested baseline settings — 16 clicks compression, 18 clicks rebound, 10 mm preload — give a sensible starting point for a standard-weight rider on street tyres, with plenty of range to firm things up for track use. The 185 mm oil / air cap position is likewise a recommended baseline, not a fixed value, so you can run more or less air volume as your setup evolves.

Road and Track Use

Because the DDS kit is built around high oil volume and rapid response, it rewards the kind of varied riding that most RSV4 owners actually do. On the road, the improved small-bump compliance takes the edge off poor surfaces without sacrificing mid-corner stability. On track, the cavitation-free design means performance does not degrade across a race distance — the fork behaves the same on lap twenty as it did on lap one. That combination of street manners and race capability is precisely where this kit earns its value.

Fitment and Compatibility

• Aprilia RSV4 1000 R APRC (2011–2015)
• Aprilia RSV4 1000 RR (2015–2018)
• Aprilia Tuono V4 R (2011–2012)
• Aprilia Tuono V4 R APRC (2012–2013)

Specifications