
The facts.
| Brand | K-Tech |
|---|---|
| Part Number | 120-023-150-005 |
| System | 20 mm Independent Damping System (20IDS) |
| Inner Diameter | 20 mm |
| Overall Length | 723 mm |
| Compression Adjustment | 30 clicks (independent) |
| Rebound Adjustment | 30 clicks (independent) |
| Suggested Oil/Air Cap Height | 150 mm |
| Spring Compatibility | 305–370 series (sold separately) |
| Fitment | Kawasaki ZX-4RR (2023–2026) |
DescriptionThe whole story▼
Discover all-day comfort and a genuinely rewarding ride from the Kawasaki ZX-4RR with the K-Tech 20IDS Open Cartridge Kit. Engineered around K-Tech's 20 mm Independent Damping System, this cartridge upgrade replaces the factory internals with a fully tuneable platform that puts real suspension control in your hands — whether you are threading through a demanding morning commute or pushing hard across a circuit.
Key Features
- 20 mm Independent Damping System (20IDS) provides separate, precise control over compression and rebound damping for a personalised, fatigue-free ride feel across all conditions.
- 30 clicks of independent compression adjustment and 30 clicks of independent rebound adjustment deliver a vast tuning range to suit rider weight, preference and road surface.
- Increased stroke compared to the stock cartridge improves wheel travel and compliance, translating directly into greater comfort and confidence over longer distances.
- Aircraft-grade aluminium construction keeps unsprung weight low while offering the structural integrity demanded by both track and road use.
- Hard-anodised and super-finished surfaces dramatically reduce internal friction and extend service life, maintaining consistent damping character ride after ride.
- Direct fitment for Kawasaki ZX-4RR model years 2023 to 2026, requiring no fork machining or modification.
Precision Tuning for Every Rider
The 20IDS architecture separates the compression and rebound circuits completely, so adjusting one does not affect the other. Starting from the suggested baseline settings — 16 compression clicks, 18 rebound clicks and an oil/air cap height of 150 mm — riders can dial in their exact preference without compromise. Whether the priority is plush all-day comfort, sharper turn-in for spirited road riding or a firmer track setup, the K-Tech 20IDS gives you the tools to get there methodically and repeatably.
Build Quality and Longevity
Every component in the 120-023-150-005 kit is machined from aircraft-specification aluminium alloy, then hard-anodised and super-finished to minimise stiction. The result is a cartridge that moves freely and consistently, avoiding the vague mid-stroke feel that plagues worn or cheap fork internals. K-Tech's engineering heritage — rooted in British suspension development for road and race — is evident in the tight tolerances and thoughtful adjustment ergonomics throughout.
Fitment and Compatibility
This cartridge kit is designed exclusively for the Kawasaki ZX-4RR covering model years 2023, 2024, 2025 and 2026. The 20 mm inner diameter and 723 mm overall length are matched precisely to the ZX-4RR fork tubes. Please note that compatible fork springs from the K-Tech 305–370 series must be ordered separately. Installation by an authorised K-Tech Service Centre is strongly recommended to ensure correct setup and to preserve warranty coverage.
Specifications
- Part number: 120-023-150-005
- System: 20 mm Independent Damping System (20IDS)
- Inner diameter: 20 mm
- Overall length: 723 mm
- Compression adjustment: 30 clicks (independent)
- Rebound adjustment: 30 clicks (independent)
- Suggested oil/air cap height: 150 mm
- Suggested compression clicks: 16
- Suggested rebound clicks: 18
- Spring compatibility: 305–370 series (sold separately)
- Fitment: Kawasaki ZX-4RR (2023–2026)
FitmentWhich bikes this fits▼
- Kawasaki ZX-4RR (2023–2026)
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