
The facts.
| Brand | K-Tech |
|---|---|
| Part Number | 155-021-150-020 |
| System | Direct Damping System (DDS) closed cartridge |
| Fitment | Kawasaki ZX-10 R / ZX-10 RR (2021–2026) |
| Spring Series | 36-260 |
| Main Piston Diameter | 20 mm |
| Control Piston Diameter | 31 mm |
| Outer Diameter | 8 mm |
| Compression / Rebound Adjustment | 30-way each (recommended: 16 clicks compression, 18 clicks rebound) |
| Recommended Preload | 10 mm |
DescriptionThe whole story▼
Engineered for the serious Superbike rider who refuses to compromise, the K-Tech DDS Closed Cartridge Kit transforms the standard fork on the Kawasaki ZX-10 R and ZX-10 RR into a precision instrument worthy of the world's most demanding circuits. Built around K-Tech's patented Direct Damping System, this cartridge kit brings genuine race-proven hardware to your road or track machine.
Key Features
- Direct Damping System (DDS) technology: a pressurised damping circuit that eliminates cavitation and delivers consistent, fade-free performance lap after lap.
- 30-way independently adjustable compression and rebound damping — dial in your exact setup for road, track day or full race use.
- Precision-machined 20 mm main piston and 31 mm control piston combine to optimise oil flow and sharpen response to surface changes.
- Patented closed-cartridge architecture prevents oil aeration, safeguarding damping linearity even under sustained high-speed loading.
- Designed as a direct-fit replacement inside the OEM fork legs of the ZX-10 R/RR — no external modifications required.
- Battle-tested in the British Superbike Championship and the Isle of Man TT, where build integrity is never a theoretical matter.
Build Quality and Premium Materials
Every component in the K-Tech DDS Closed Cartridge Kit reflects the uncompromising manufacturing standards that have made K-Tech a trusted name in professional paddocks. The cartridge bodies and pistons are precision-machined from high-grade materials to tight tolerances, ensuring that the 20 mm main piston and 31 mm control piston move without play or friction losses that would blur feedback to the rider. The closed-cartridge design keeps the damping oil isolated from the fork's main oil bath, protecting fluid integrity across a wide temperature range and eliminating the cavitation that plagues conventional open cartridges under hard braking or rapid direction changes. This is not an aftermarket upgrade assembled from catalogue parts — it is an integrated system conceived, tested and refined through seasons of top-level competition.
Performance on Road and Track
The 30-way adjustability for both compression and rebound damping gives riders and technicians a genuinely useful range of tuning rather than the narrow window offered by OEM or entry-level aftermarket units. Factory-recommended baseline settings — 16 clicks of compression, 18 clicks of rebound and 10 mm of preload — provide a well-balanced starting point from which individual preferences or circuit demands can be addressed methodically. The spring preload support built into the system maintains consistent geometry under braking and acceleration loads, a quality that riders notice most when trail-braking into tight chicanes or powering hard out of slow corners. Three pairs of springs are included to allow rate selection suited to rider weight and riding style, meaning the kit arrives as a complete, immediately tuneable package rather than a bare cartridge requiring additional sourcing.
Fitment and Compatibility
The K-Tech DDS Closed Cartridge Kit 155-021-150-020 is a direct fit for the following motorcycles:
- Kawasaki ZX-10 R (2021, 2022, 2023, 2024, 2025, 2026)
- Kawasaki ZX-10 RR (2021, 2022, 2023, 2024, 2025, 2026)
Installation requires fork disassembly and is recommended to be carried out by an authorised K-Tech Service Centre to ensure correct setup, maximum safety and full performance realisation.
Specifications
- Spring series: 36-260
- Main piston diameter: 20 mm
- Control piston diameter: 31 mm
- Outer diameter: 8 mm
- Compression adjustment: 30-way (recommended baseline: 16 clicks)
- Rebound adjustment: 30-way (recommended baseline: 18 clicks)
- Recommended preload: 10 mm
What's includedEverything in the box▼
- 3 pairs of springs for individual rate selection
- Specialist tools for cartridge installation
FitmentWhich bikes this fits▼
- Kawasaki ZX-10 R/RR (2021–2026)
Questions, one topic at a time.
Get the real shipping cost for this item to your address — the same rates as checkout.
Choose a destination and hit Estimate — we fetch the live rates for this item.
We’re based in Germany. Standard delivery goes by DHL and national postal services and takes about 2–5 days within Germany, 1–2 weeks within the EU and 2–6 weeks outside the EU. Need it sooner? Express delivery reaches most of the world within a few days — just choose it at checkout where available.
Your exact shipping cost is calculated by destination and weight and shown at checkout before you pay — no hidden fees. Express delivery is selectable at checkout where available.
Yes, we ship to over 130 countries. Prices, taxes and delivery times for your destination are calculated automatically at checkout.
Within the EU, no — our prices already include all duties and EU VAT. For deliveries outside the EU (e.g. Switzerland, the UK or the USA), your order may be subject to import duties and taxes set by your country. These are collected by the carrier when your parcel arrives, aren’t included in our prices, and are outside our control.
As soon as your parcel ships we email you a tracking link, so you can follow it all the way to your door.
On out-of-stock items you can request a delivery time or leave your email to be notified the moment it returns — just use the notification box on the product.
You have the right to cancel within 14 days of receiving your order. Register your return by email first; once it’s approved you have a further 14 days to send the goods back. Items should be unused and in their original packaging.
Register your return by email with your order number before sending anything back, and we’ll send you the return instructions. Please note: returns that aren’t registered in advance can’t be accepted.
The quickest way is to place a new order for the size you need and register a return for the original by email — just let us know it’s an exchange.
We’re sorry — that shouldn’t happen. Contact us with your order number and a photo as soon as you can, and we’ll arrange a replacement or refund right away. Faulty goods are always covered by your statutory warranty.
Refunds go back to your original payment method, usually within 3–5 working days of your return reaching our warehouse.
PayPal, all major credit and debit cards (Visa, Mastercard, American Express), Klarna (pay later and instalments), Apple Pay, Google Pay and more — all processed securely via PayPal and Mollie.
Yes. Choose Klarna at checkout to split your purchase into flexible monthly installments.
Your payment is taken when you place your order. If you choose Klarna, you pay later according to Klarna’s terms.
Every payment runs over an SSL-encrypted connection through certified providers. We never see or store your full card details.
If your order hasn’t shipped yet, contact us as soon as possible and we’ll do our best to change or cancel it.
No — you can check out as a guest. An account simply lets you track orders and reorder faster.
For customers in the EU, prices are shown including your country’s local VAT. For customers outside the EU, prices are shown without VAT — instead, your country’s import taxes and duties may apply on delivery (see the customs question).
Yes. Your invoice is attached to your order confirmation email and is also available in your account.
Yes. We’re an authorised dealer, so every product is 100% original and comes with the full manufacturer warranty.
Yes. Everything we sell is genuine and comes with the manufacturer’s warranty, on top of your statutory rights. Keep your invoice as proof of purchase and contact us if you ever need to make a claim — we’ll help you through it.
Our team is happy to help. Use the contact button below and we’ll personally help you choose the right gear or part.
Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
Yes — it’s tested and approved to the current ECE 22.06 standard and road-legal across the EU.
Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
Yes — the cheek pads are channelled so the arms of your glasses slide in comfortably.
Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
Our team will personally help you choose the right gear or part — around 24h for a reply.