K-Tech Razor-R Spring Kawasaki Ninja 400 (18-23) 279S-018-150-005
K-Tech Razor-R Spring Kawasaki Ninja 400 (18-23) 279S-018-150-005
Delivery time on request
K-Tech Razor-R Sprbein for Kawasaki Ninja 400 (2018-2023)
Article number: 279S-018-150-005
Increase performance and handling of your Kawasaki Ninja 400 (2018-2023) With the high quality K-Tech Razor-R Federbein. This premium spring bone was specially developed in order to be noticeably improved compared to the standard equipment Performance, Driving stability And a sportier one Driving experience to offer.
Thanks to the adjustable Compression and rebound in damping, Spring preload and Length adjustment the strut can be optimally tailored to your individual driving requirements. The nitrogen filling (N2) ensures constant damping performance, even with high stress.
Equipped with the 46-150-140 spring, the shocking bone offers maximum stability and control. For a perfect coordination on different driver weights and areas of application are Different spring thicknesses available.
Product advantages of the K-Tech Razor-R Federbein:
✔️ Increased performance and control: Improved traction and stability for sporty driving.
✔️ 14-way adjustable compression damping: Fine tuning for optimal performance.
✔️ 16-way adjustable rebound in damping: Exact control in the event of quick changes of direction.
✔️ Adjustable spring tension: Perfect adaptation to the driver's weight and driving style.
✔️ Length adjustment: Flexible adaptation of the seat height and the handling.
✔️ Filled with nitrogen (N2): Prevents foam formation for constant damping.
✔️ Simple assembly: Suitable and easy to exchange.
✔️ Sporty design: High quality optics to match the Kawasaki Ninja 400.
Technical data from the K-Tech Razor-R Federbein:
- Feather: 46-180 series (46-150-140)
- Total length: 320.00 mm
- Local tolerance: -4 mm / +6 mm
- Hub: 65.00 mm
- Spring: 95.00 N
- Gas pressure: 10.00 bar
- Upper bracket: Eye, 30.00 mm width, 10.00 mm bolt diameter
- Lower bracket: Eye, 40.00 mm width, 10.00 mm bolt diameter
- Compression clicks: 14
- Rebound clicks: 16
- Preliminary tension: 10 mm
- RCU setting: 4.00 mm
- Diameter RCU housing: 35.00 mm
- Diameter RCU rod: 14.00 mm
Scope of delivery:
- 1x K-Tech Razor-R Federbein for Kawasaki Ninja 400 (2018-2023)
- Assembly hardware For a simple and safe installation
Mounting instructions:
⚠️ Danger: The installation should only be done by a Authorized K-Tech Service Center take place.
🔧 Special tools and specialist knowledge are required for professional assembly to ensure the maximum performance and safety of the spring.
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About Us
About Us
Our passion for quality and innovation drives us to offer you the best products and services for motorcycle enthusiasts. From exclusive high-performance parts to tailor-made solutions — your riding experience is at the center of everything we do.
Shipping & Returns
Shipping & Returns
We ship with DHL and FedEx — if requested, also via express. If an item is in stock, shipping via express can, in many cases, be delivered within 1 business day. Standard delivery time is typically about 2–5 business days within the country, and worldwide usually about 1 week. Please check the available shipping options and transit times in the cart, as we offer several shipping providers depending on the country.
Returns must be registered in advance by email and are possible according to our return policy (14 days to request a return + 14 days return shipping deadline after approval). Please note: Unregistered returns will not be accepted. You can find all details on the terms, exceptions, and refunds in our return policy.
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Write to our team via email – we’ll get back to you as quickly as possible.
How long does it take to process my order?
How long does it take to process my order?
If the item is in stock, we usually process your order very quickly; in many cases it can even be shipped the same day.
Our processing times are Monday to Friday, 07:30–16:30.
Do you ship internationally?
Do you ship internationally?
Yes, we ship worldwide. Shipping is carried out depending on the country and the selection, via DHL or FedEx.
What is your return policy?
What is your return policy?
Returns must be registered in advance by email. You can request a return within 14 days of receiving the item and, after approval, you have another 14 days to send it back.
Important: Unregistered returns are not accepted. All details can be found in our cancellation policy.
What does “delivery time on request” mean?
What does “delivery time on request” mean?
“Delivery time on request” means the item is generally not in stock right away and may need to be ordered separately. Please contact us before purchase – we’ll check availability and tell you the estimated delivery time.
Do you offer express shipping?
Do you offer express shipping?
Yes, we offer express shipping. If an item is in stock, in many cases shipping can be completed within 1 business day (depending on the country and shipping option). You can see the available shipping methods in the shopping cart.

