K-Tech Fork Oil Seal & Dust Cap Kit – Kawasaki Ninja 400 (2018–2023) FSK-007
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- Worldwide shipping
- Genuine parts & verified quality
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- 14-day returns — in stock ships within 24h
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Returns must be registered in advance by email and are possible in line with our cancellation policy (14-day return request + 14-day return window after approval). Please note: unregistered returns are not accepted. You'll find all details on conditions, exceptions and refunds in our cancellation policy.
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Manufactured by NOK, the world-leading authority in sealing technology, this K-Tech fork oil seal and dust cap kit delivers precision-engineered protection for the front fork of the Kawasaki Ninja 400 (2018–2023). Every dimension is held to exacting tolerances, ensuring a leak-free seal that safeguards suspension performance across the full service life of the fork.
Key Features
- Produced by NOK, the global benchmark for sealing technology — a name trusted by OEM manufacturers and professional race teams worldwide
- Prevents fork oil loss with a precisely dimensioned oil seal, maintaining correct damping characteristics and rider safety
- Dust caps shield the fork stanchions from road grit, moisture and contamination, extending the life of the seals and inner tubes
- Exact-fit dimensions (41.00 mm inner diameter, 54.00 mm outer diameter) ensure a secure installation with no compromise to function
- Part number FSK-007 guarantees you are ordering the correct component for the 2018–2023 Ninja 400
Quality & Engineering
NOK's sealing compounds and manufacturing processes are held to tolerances that exceed the demands of everyday road riding and track day use alike. The oil seals resist the thermal cycling and pressure fluctuations inherent to high-performance telescopic forks, while the dust caps form a consistent barrier against the fine abrasive particles that accelerate wear on fork stanchions. Together, the two seal types work as a system — keeping oil where it belongs and contamination firmly out.
Installation Note
Installation must be carried out exclusively by an authorised K-Tech Service Centre. Specialist tooling and technical expertise are required to ensure correct seating and to guarantee the safety and optimal function of the fork assembly.
Fitment & Compatibility
This kit is designed and confirmed to fit the following model:
- Kawasaki Ninja 400 — model years 2018, 2019, 2020, 2021, 2022, 2023
Specifications
| Specification | Detail |
|---|---|
| Part Number | FSK-007 |
| Inner Diameter | 41.00 mm |
| Outer Diameter | 54.00 mm |
| Seal Manufacturer | NOK |
| Contents | 2x oil seals, 2x dust caps |
| Fitment | Kawasaki Ninja 400 (2018–2023) |
| Brand | K-Tech |
|---|---|
| Part Number | FSK-007 |
| Seal Manufacturer | NOK |
| Inner Diameter | 41.00 mm |
| Outer Diameter | 54.00 mm |
| Contents | 2x oil seals, 2x dust caps |
| Fitment | Kawasaki Ninja 400 (2018–2023) |
| Installation | Authorised K-Tech Service Centre only |
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2x oil seals (fork oil seals)
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2x dust caps
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// K-Tech
K-Tech Fork Oil Seal & Dust Cap Kit – Kawasaki Ninja 400 (2018–2023) FSK-007

Tech specs
- Brand
- K-Tech
- Part Number
- FSK-007
- Seal Manufacturer
- NOK
- Inner Diameter
- 41.00 mm
- Outer Diameter
- 54.00 mm
- Contents
- 2x oil seals, 2x dust caps
- Fitment
- Kawasaki Ninja 400 (2018–2023)
- Installation
- Authorised K-Tech Service Centre only
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
Frequently asked questions
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