K-Tech DDS Closed Cartridge Kit for Honda CBR 600 RR 2021-2025, part 155-021-130-010
02 · Data & docs

The facts.

Technical data
Part number155-021-130-010
Spring series36-260
Inner diameter (piston)20 mm
Outer diameter32 mm
Assembled length675.45 mm
Suggested compression clicks16
Suggested rebound clicks18
Suggested preload10 mm
FitmentHonda CBR 600 RR (2021-2025)
DescriptionThe whole story

Engineered for riders who demand measurable, repeatable suspension performance, the K-Tech DDS Closed Cartridge Kit transforms the front-end behaviour of the Honda CBR 600 RR (2021-2025) through K-Tech's proven Direct Damping System technology. Designed for track use and performance-oriented road riding alike, this kit delivers precise damping control and exceptional stability under extreme loading conditions where factory internals simply cannot keep pace.

Key Features

  • Direct Damping System (DDS) architecture provides independent compression and rebound control, eliminating the cross-contamination inherent in conventional open-cartridge designs.
  • 20 mm main piston paired with a 31 mm control piston for rapid, accurate damping response at all speeds.
  • Factory-suggested baseline settings — 16 compression clicks, 18 rebound clicks, 10 mm preload — allow an immediate, informed starting point for any setup session.
  • 36-260 series spring specification matched to the CBR 600 RR chassis geometry for optimised sag and load progression.
  • Closed cartridge construction prevents oil aeration under sustained track use, maintaining consistent damping forces lap after lap.
  • Direct OEM fitment for 2021-2025 Honda CBR 600 RR; no machining or custom fabrication required.

Performance & Construction

The DDS closed cartridge design separates damping oil from the main oil bath, a fundamental engineering advantage that keeps the system free of air bubbles even after repeated hard braking and high-speed compression events. The 20 mm piston diameter gives K-Tech's engineers a generous working area for precise shim-stack tuning, while the 31 mm control piston responds to high-frequency inputs — road surface irregularities and kerb strikes — with a directness that open cartridges cannot replicate. At 675.45 mm assembled length and 32 mm outer diameter, the kit is dimensioned specifically for the CBR 600 RR fork tube without any spacer modification.

Track & Road Use

On circuit, the stability gains are most apparent under hard braking into tight hairpins: the front end remains planted and communicative rather than diving unpredictably, giving the rider a consistent reference point for late braking. On technical road sections, the same control translates into confidence over crests and mid-corner bumps. K-Tech's suggested click settings provide a sensible baseline from which a suspension technician — or an experienced rider — can dial the kit to individual weight, riding style and circuit demands.

Fitment & Compatibility

This closed cartridge kit is engineered exclusively for the following model:

  • Honda CBR 600 RR — model years 2021, 2022, 2023, 2024 and 2025

Always verify fork tube inner diameter and overall length against your specific machine before fitting. If in doubt, consult a qualified suspension specialist.

Specifications

Specification Detail
Part number 155-021-130-010
Spring series 36-260
Inner diameter (piston) 20 mm
Outer diameter 32 mm
Assembled length 675.45 mm
Suggested compression clicks 16
Suggested rebound clicks 18
Suggested preload 10 mm
Fitment Honda CBR 600 RR (2021-2025)
FitmentWhich bikes this fits
  • Honda CBR 600 RR (2021–2025)
07 · Support

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08 · Paddock

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