K-Tech 25IDS Open STK Cartridge Kit – Suzuki GSX-R 1000 (2012–2023) 125-012-230-020
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Engineered from aerospace-grade aluminium with hard-anodised, super-finished internals, the K-Tech 25IDS Open STK Cartridge Kit transforms the stock forks of the Suzuki GSX-R 1000 (2012–2023) into a precision-tunable platform that is fully homologated for Superstock 1000 competition. Every component reflects K-Tech's obsessive attention to material quality and surface finish — this is not a budget upgrade, it is a race-ready rebuild built to last.
Key Features
- 25 mm Independent Damping System (25IDS) gives separate, precise control over compression and rebound circuits without one affecting the other.
- 24 clicks of independent compression adjustment and 30 clicks of independent rebound adjustment allow exceptionally fine damping calibration for every track or road condition.
- Increased travel over the original cartridge unlocks more suspension stroke and improved wheel control under hard braking and corner entry.
- Aerospace-grade aluminium construction paired with hard-anodised, super-finished surfaces ensures long service life and consistent damping under sustained heat and load.
- Approved for Superstock 1000 classes, making this kit a genuine race-legal solution straight from the box.
- Wide spring range (36-260 series) available separately, allowing precise spring rate selection to match rider weight and riding style.
Build Quality and Materials
The 25IDS system is machined from high-grade aluminium alloy to exacting tolerances, then treated with a hard-anodised super finish that reduces friction and resists wear even after repeated full-stroke compression cycles. The result is a cartridge that moves with exceptional consistency lap after lap, delivering the kind of feedback that lets a rider commit to the braking zone with confidence. At 659.50 mm overall length and a 125 mm stroke, the geometry integrates cleanly into the GSX-R 1000's original fork legs without modification to the lower legs or yokes.
Performance and Tuning
Independent damping adjustment is the defining advantage of the 25IDS design. Compression and rebound circuits operate entirely separately, so dialling in more rebound control to handle a bumpy chicane exit does not inadvertently stiffen the compression response into the next braking zone. K-Tech's suggested baseline settings — 12 clicks compression, 18 clicks rebound, 8 mm preload — give a proven starting point from which riders can build a setup tailored to circuit, tyre compound and personal preference. The 36-260 spring series covers a broad range of rider weights; springs must be ordered separately to ensure the correct rate is matched to the individual.
Fitment and Compatibility
This cartridge kit is designed and validated specifically for the following motorcycle:
- Suzuki GSX-R 1000 — model years 2012 to 2023
Installation by an authorised K-Tech Service Centre is strongly recommended to ensure correct assembly, bleed procedure and baseline setup.
Specifications
| Specification | Detail |
|---|---|
| Part number | 125-012-230-020 |
| System | 25 mm Independent Damping System (25IDS) |
| Inner diameter | 25 mm |
| Outer diameter | 14 mm |
| Length | 659.50 mm |
| Stroke | 125 mm |
| Compression adjustment | 24 clicks independent |
| Rebound adjustment | 30 clicks independent |
| Suggested compression setting | 12 clicks |
| Suggested rebound setting | 18 clicks |
| Suggested preload | 8 mm |
| Spring series (sold separately) | 36-260 series |
| Homologation | Superstock 1000 approved |
| Fitment | Suzuki GSX-R 1000 (2012–2023) |
| Part number | 125-012-230-020 |
|---|---|
| System | 25 mm Independent Damping System (25IDS) |
| Inner diameter | 25 mm |
| Outer diameter | 14 mm |
| Length | 659.50 mm |
| Stroke | 125 mm |
| Compression adjustment | 24 clicks independent |
| Rebound adjustment | 30 clicks independent |
| Suggested compression setting | 12 clicks |
| Suggested rebound setting | 18 clicks |
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// K-Tech
K-Tech 25IDS Open STK Cartridge Kit – Suzuki GSX-R 1000 (2012–2023) 125-012-230-020

Tech specs
- Part number
- 125-012-230-020
- System
- 25 mm Independent Damping System (25IDS)
- Inner diameter
- 25 mm
- Outer diameter
- 14 mm
- Length
- 659.50 mm
- Stroke
- 125 mm
- Compression adjustment
- 24 clicks independent
- Rebound adjustment
- 30 clicks independent
- Suggested compression setting
- 12 clicks
- Suggested rebound setting
- 18 clicks
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
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