
The facts.
| Brand | K-Tech |
|---|---|
| Part Number | 155-013-150-015 |
| Fitment | Kawasaki ZX-6R 636 (2013–2026) |
| System | DDS (Direct Damping System) closed cartridge |
| Piston diameter | 20 mm |
| Control valve diameter | 31 mm |
| Piston rod outer diameter | 8 mm |
| Preload adjustment range | 18 mm |
| Compression / rebound adjustment | 30-way |
| Spring series | 36-260 |
DescriptionThe whole story▼
Designed specifically for the stock forks of the Kawasaki ZX-6R 636 from 2013 to 2026, the K-Tech DDS Closed Cartridge Kit delivers a ride that feels as composed after a full day in the saddle as it does on the first corner. Whether you are threading through traffic or threading the needle at a circuit, the Direct Damping System keeps the front end settled and responsive without ever asking you to compromise between comfort and control.
Key Features
- 30-way independently adjustable compression and rebound damping for a setup that suits your exact riding style and conditions
- 18 mm preload adjustment range allows precise spring loading to match rider weight and road surface
- Patented DDS (Direct Damping System) technology actively prevents cavitation, ensuring consistent damping force across the full stroke
- Asymmetric, independently operating damping circuits reduce response lag and sharpen front-end dynamics
- 20 mm piston paired with 31 mm control valves promotes optimised oil flow and finer damping resolution
- 8 mm piston rod minimises system offset for a more linear, predictable feel
- Increased travel compared to the original cartridge, giving the fork greater compliance over rough surfaces
- Race-proven in the British Superbike Championship and the Isle of Man TT
All-Day Comfort Through Precision Engineering
A cartridge upgrade is often thought of as a pure track tool, but the K-Tech DDS is equally transformative on the road. The asymmetric damping circuits work independently, so compression and rebound events are handled separately rather than as a compromise. The result is a fork that absorbs successive bumps without building up harshness — the kind of progressive, consistent feel that keeps your hands fresh and your shoulders relaxed on long rides. The 30-way click adjustment means you can dial in a softer, more pliant character for touring without sacrificing the crispness needed when the road opens up.
Track Performance
On circuit, the DDS design comes into its own. Cavitation — the formation of air bubbles in the damper oil under rapid successive compression — is the enemy of consistent lap times, because it causes the fork to feel progressively softer as a session goes on. K-Tech's patented closed cartridge architecture eliminates this by maintaining a sealed, pressurised oil circuit. Combined with the 31 mm control piston and the spring-loaded stability mechanism, the system delivers repeatable lap-to-lap performance whether you are at Brands Hatch or battling the Mountain Course.
Fitment & Compatibility
This kit fits directly into the original forks of the Kawasaki ZX-6R 636 for all model years from 2013 to 2026. No fork tube modification or external reservoir routing is required — the closed cartridge design integrates cleanly within the existing fork leg architecture.
Installation by an authorised K-Tech Service Centre is strongly recommended to ensure correct assembly, oil fill, and setup, and to achieve the full safety and performance potential of the system.
Specifications
- Spring series: 36-260
- Inner diameter: 20 mm / 32 mm
- Outer diameter (piston rod): 8 mm
- Compression clicks (recommended setting): 16
- Rebound clicks (recommended setting): 18
- Preload (recommended setting): 10 mm
- Preload adjustment range: 18 mm
- Compression / rebound adjustment: 30-way
- Part number: 155-013-150-015
What's includedEverything in the box▼
- 3 pairs of springs for individual setup
- Specialist tools for spring changes
FitmentWhich bikes this fits▼
- Kawasaki ZX-6R 636 (2013–2026)
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