
The facts.
| Brand | K-Tech |
|---|---|
| Part Number | 155-017-270-010 |
| Fitment | Yamaha YZF-R6 RJ27 (2017–2026) |
| System Type | DDS (Direct Damping System) closed cartridge |
| Spring Series | 36-260 |
| Inner Diameter | 20 mm / 32 mm |
| Outer Diameter (piston rod) | 8 mm |
| Overall Length | 693 mm |
| Compression / Rebound Adjustment | 30-way (each circuit, independent) |
| Preload Adjustment Range | 18 mm |
DescriptionThe whole story▼
Trusted by British Superbike teams and proven at the Isle of Man TT, the K-Tech DDS Closed Cartridge Kit for the Yamaha YZF-R6 RJ27 (2017–2026) brings race-validated, safety-assured damping to your original fork. The patented Direct Damping System eliminates cavitation under extreme track conditions, delivering consistent, predictable feedback lap after lap — the kind of reliability that matters when you are carrying full corner speed.
Key Features
- Race-proven performance: homologated across British Superbike rounds and the Isle of Man TT, giving you confidence backed by the highest levels of motorcycle competition
- Patented DDS (Direct Damping System) design actively prevents cavitation, ensuring stable and repeatable damping regardless of load or temperature
- 30-way independently adjustable compression and rebound damping for precise, individualised setup
- 18 mm preload adjustment for fine, repeatable spring rate tuning without disturbing the damping circuit
- Asymmetric, independent damping circuits improve chassis dynamics and sharpen response times
- Increased stroke compared to the original cartridge, expanding the suspension's working range for both road and track use
Engineering Detail
At the heart of the kit is a 20 mm piston that increases oil flow through the 31 mm control valves, allowing the damping force to build smoothly and linearly rather than spiking under hard compression. The 8 mm piston rod minimises system offset, keeping the cartridge geometry true to the fork's original architecture. The pressurised closed-cartridge design maintains oil contact across the full stroke, eliminating the air entrainment that causes inconsistent damping in open-cartridge systems. The spring return force provides constant stability under varying load conditions, making the kit equally effective whether you are chasing a lap time or making rapid direction changes on a challenging road route.
Track Record & Intended Use
K-Tech designed this cartridge kit to work within the stock Yamaha fork tubes, making it a high-impact upgrade without requiring fork replacement. The asymmetric circuit architecture — where compression and rebound circuits operate independently — allows a suspension technician to dial in each characteristic separately, reducing compromise. This is the system of choice for teams where damping consistency under race conditions is a safety-critical requirement, not merely a performance preference. Installation by a K-Tech authorised service centre is strongly recommended; specialist tools and techniques are required to realise the full potential of the system safely.
Fitment & Compatibility
This kit fits the Yamaha YZF-R6 RJ27, model years 2017 to 2026. It is designed for use with the original Yamaha fork tubes — no fork replacement is required. Always verify your specific chassis variant before ordering.
Specifications
- Spring series: 36-260
- Inner diameter: 20 mm / 32 mm
- Outer diameter (piston rod): 8 mm
- Overall length: 693 mm
- Recommended compression clicks: 16
- Recommended rebound clicks: 18
- Recommended preload: 10 mm
- Compression / rebound adjustment range: 30 ways (each circuit)
- Preload adjustment range: 18 mm
- Part number: 155-017-270-010
What's includedEverything in the box▼
- 3 pairs of springs for individual setup
- Specialist tools for installation
FitmentWhich bikes this fits▼
- Yamaha YZF-R6 RJ27 (2017–2026)
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