K-Tech DDS Closed STK Cartridge Kit – BMW M1000RR K66 (2021–2026) 155-019-030-021

Designed specifically for the stock forks of the BMW M1000RR K66, the K-Tech DDS Closed STK Cartridge Kit delivers a level of suspension control that transforms how this superbike feels across every session — from a long trackday to a full race weekend. Whether you are chasing consistency lap after lap or simply want a ride that responds precisely to your inputs without fatigue, this cartridge kit gives you the tools to dial in the exact setup your riding demands.

Key Features

• 30-way adjustable compression and rebound damping for a fully personalised, rider-specific setup
• 18 mm preload adjustment for precise spring rate fine-tuning without removing the forks
• 20 mm piston and 31 mm control valves deliver increased oil flow and faster, more consistent damping response
• 8 mm piston rod reduces system offset for a more direct, natural feel through the bars
• Patented DDS (Direct Damping System) design eliminates cavitation, ensuring reliable damping even under sustained hard braking and high-speed direction changes
• Independent, asymmetric damping circuits cut reaction time and improve chassis dynamics noticeably
• Approved for Superstock 1000 classes — race-proven at the British Superbike Championship and the Isle of Man TT
• Increased stroke compared to the original OEM cartridge

Suspension Technology That Works With You

The DDS Closed cartridge system works inside your existing fork legs, replacing the standard internals with a pressurised, purpose-engineered unit. The pressurised spring force means damping performance stays reliable regardless of oil temperature or the intensity of use — a critical advantage on a track where conditions change between morning and afternoon sessions. The asymmetric, independently operating damping circuits mean compression and rebound each respond to their own inputs, dramatically shortening the time between a road or track event and the fork's corrective response. The result is a front end that feels planted and communicative rather than vague or reactive.

Precision Engineering for the BMW M1000RR

K-Tech engineered this cartridge kit to work with the original fork geometry of the M1000RR K66 rather than replacing it. The 31 mm control valves and 20 mm piston are matched to the specific internal dimensions of the BMW's front fork, ensuring the improved oil flow translates directly into sharper turn-in, better mid-corner stability and more confidence under braking. The included 36-260 series springs and dedicated spring-change tools mean setting up for your weight and riding style is straightforward at the circuit without specialist workshop equipment for routine adjustments.

Fitment & Compatibility

This cartridge kit fits the following motorcycle directly:

• BMW M1000RR K66 — model years 2021, 2022, 2023, 2024, 2025, 2026

Installation requires specialist tools and techniques. K-Tech recommend fitting by an authorised K-Tech Service Centre to ensure maximum safety and optimal performance.

What's Included

• DDS Closed STK Cartridge Kit (complete unit)
• 3 pairs of springs for individual tuning (36-260 series)
• Specialist tools for straightforward spring changes at the track

Specifications