K-Tech DDS Closed Cartridge Kit for Kawasaki ZX-10 R/RR 2021–2026 – part 155-021-150-020
02 · Data & docs

The facts.

Technical data
BrandK-Tech
Part Number155-021-150-020
SystemDirect Damping System (DDS) closed cartridge
FitmentKawasaki ZX-10 R / ZX-10 RR (2021–2026)
Spring Series36-260
Main Piston Diameter20 mm
Control Piston Diameter31 mm
Outer Diameter8 mm
Compression / Rebound Adjustment30-way each (recommended: 16 clicks compression, 18 clicks rebound)
Recommended Preload10 mm
DescriptionThe whole story

Engineered for the serious Superbike rider who refuses to compromise, the K-Tech DDS Closed Cartridge Kit transforms the standard fork on the Kawasaki ZX-10 R and ZX-10 RR into a precision instrument worthy of the world's most demanding circuits. Built around K-Tech's patented Direct Damping System, this cartridge kit brings genuine race-proven hardware to your road or track machine.

Key Features

  • Direct Damping System (DDS) technology: a pressurised damping circuit that eliminates cavitation and delivers consistent, fade-free performance lap after lap.
  • 30-way independently adjustable compression and rebound damping — dial in your exact setup for road, track day or full race use.
  • Precision-machined 20 mm main piston and 31 mm control piston combine to optimise oil flow and sharpen response to surface changes.
  • Patented closed-cartridge architecture prevents oil aeration, safeguarding damping linearity even under sustained high-speed loading.
  • Designed as a direct-fit replacement inside the OEM fork legs of the ZX-10 R/RR — no external modifications required.
  • Battle-tested in the British Superbike Championship and the Isle of Man TT, where build integrity is never a theoretical matter.

Build Quality and Premium Materials

Every component in the K-Tech DDS Closed Cartridge Kit reflects the uncompromising manufacturing standards that have made K-Tech a trusted name in professional paddocks. The cartridge bodies and pistons are precision-machined from high-grade materials to tight tolerances, ensuring that the 20 mm main piston and 31 mm control piston move without play or friction losses that would blur feedback to the rider. The closed-cartridge design keeps the damping oil isolated from the fork's main oil bath, protecting fluid integrity across a wide temperature range and eliminating the cavitation that plagues conventional open cartridges under hard braking or rapid direction changes. This is not an aftermarket upgrade assembled from catalogue parts — it is an integrated system conceived, tested and refined through seasons of top-level competition.

Performance on Road and Track

The 30-way adjustability for both compression and rebound damping gives riders and technicians a genuinely useful range of tuning rather than the narrow window offered by OEM or entry-level aftermarket units. Factory-recommended baseline settings — 16 clicks of compression, 18 clicks of rebound and 10 mm of preload — provide a well-balanced starting point from which individual preferences or circuit demands can be addressed methodically. The spring preload support built into the system maintains consistent geometry under braking and acceleration loads, a quality that riders notice most when trail-braking into tight chicanes or powering hard out of slow corners. Three pairs of springs are included to allow rate selection suited to rider weight and riding style, meaning the kit arrives as a complete, immediately tuneable package rather than a bare cartridge requiring additional sourcing.

Fitment and Compatibility

The K-Tech DDS Closed Cartridge Kit 155-021-150-020 is a direct fit for the following motorcycles:

  • Kawasaki ZX-10 R (2021, 2022, 2023, 2024, 2025, 2026)
  • Kawasaki ZX-10 RR (2021, 2022, 2023, 2024, 2025, 2026)

Installation requires fork disassembly and is recommended to be carried out by an authorised K-Tech Service Centre to ensure correct setup, maximum safety and full performance realisation.

Specifications

  • Spring series: 36-260
  • Main piston diameter: 20 mm
  • Control piston diameter: 31 mm
  • Outer diameter: 8 mm
  • Compression adjustment: 30-way (recommended baseline: 16 clicks)
  • Rebound adjustment: 30-way (recommended baseline: 18 clicks)
  • Recommended preload: 10 mm
What's includedEverything in the box
  • 3 pairs of springs for individual rate selection
  • Specialist tools for cartridge installation
FitmentWhich bikes this fits
  • Kawasaki ZX-10 R/RR (2021–2026)
07 · Support

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