K-Tech Fork Oil Seal Kit Aprilia RSV4 / RSV4 1100 Factory / R / RR / RF (2009–2026) FSS-021
Prices for Hungary include VAT · Shipping calculated at checkout
Inside the EU — no customs duties will apply.
Questions? Just reach out — our team will help you right away.
- Worldwide shipping
- Genuine parts & verified quality
- Personal email support
- 14-day returns — in stock ships within 24h
Shipping & Returns
We ship with DHL and FedEx — express on request. If an item is in stock, express delivery can often go out within 1 business day. Standard delivery takes about 2–5 business days domestically and usually around a week worldwide. Please check the available shipping options and delivery times in your cart, as we offer several carriers depending on the country.
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.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details and have no access to your credit card information.
Suspension integrity on the Aprilia RSV4 and RSV4 1100 begins with seals that can handle the demands of both road and track. The K-Tech FSS-021 oil seal kit is manufactured by NOK — the supplier of choice for leading Japanese suspension manufacturers worldwide — and brings that same engineering rigour directly to your fork service. When only factory-grade materials will do, this is the kit that delivers.
Key Features
- NOK-manufactured seals, chosen by premier Japanese suspension OEMs for their exceptional durability and consistent sealing performance
- Direct OEM-equivalent replacement — precise dimensional match ensures no compromise in damping characteristics or seal life
- Supplied as a complete pair so both fork legs are serviced simultaneously, maintaining balanced suspension action
- Precision dimensions of 43.00 x 55.10 x 11.00/14.00 mm guarantee a factory-correct fit in the RSV4 fork tubes
- Effective dual-lip construction keeps fork oil in and road contamination out, preserving smooth, consistent damping over the long term
- Covers all RSV4 and RSV4 1100 variants — Factory, R, RR and RF — across the full 2009–2026 production span
Build Quality and Materials
The defining characteristic of the FSS-021 kit is provenance. NOK is not a generic aftermarket supplier; they are the original-equipment seal manufacturer behind many of the world's most respected suspension units. Their production process demands tight dimensional tolerances and compound consistency that cheaper alternatives cannot match. The result is a seal that seats cleanly, resists premature wear and maintains its lip profile across temperature cycles — from cold pre-dawn warm-ups to sustained track sessions where fork temperatures climb significantly.
For the Aprilia RSV4 platform — a chassis known for precise, reactive front-end feel — this level of manufacturing quality is not a luxury. A weeping fork seal introduces unwanted variables into suspension behaviour and contaminates the brake disc if left unaddressed. Fitting seals of this calibre during a fork service eliminates those risks and restores the front end to the condition it left the factory in.
Installation Note
Installation of fork oil seals requires specialised tools and a working knowledge of suspension servicing procedures. K-Tech recommends that fitting is carried out by an authorised K-Tech Service Centre to ensure full performance and safety of the product.
Fitment and Compatibility
The K-Tech FSS-021 seal kit is designed as a direct replacement for the following Aprilia models:
- Aprilia RSV4 R — 2009 to 2015
- Aprilia RSV4 Factory — 2009 to 2015
- Aprilia RSV4 RR — 2015 to 2020
- Aprilia RSV4 RF — 2015 to 2020
- Aprilia RSV4 1100 — 2019 to 2026
- Aprilia RSV4 1100 Factory — 2019 to 2026
Specifications
- Inner diameter: 43.00 mm
- Outer diameter: 55.10 mm
- Height (1): 11.00 mm
- Height (2): 14.00 mm
- Quantity: 2 oil seals per kit
| Brand | K-Tech |
|---|---|
| Part number | FSS-021 |
| Seal manufacturer | NOK |
| Inner diameter | 43.00 mm |
| Outer diameter | 55.10 mm |
| Height (1) | 11.00 mm |
| Height (2) | 14.00 mm |
| Quantity | 2 oil seals (pair) |
| Fitment | Aprilia RSV4 / RSV4 1100 Factory / R / RR / RF (2009–2026) |
-
2x K-Tech fork oil seals for Aprilia RSV4 / RSV4 1100 Factory / R / RR / RF (2009–2026)
No reviews yet.
// K-Tech
K-Tech Fork Oil Seal Kit Aprilia RSV4 / RSV4 1100 Factory / R / RR / RF (2009–2026) FSS-021

Tech specs
- Brand
- K-Tech
- Part number
- FSS-021
- Seal manufacturer
- NOK
- Inner diameter
- 43.00 mm
- Outer diameter
- 55.10 mm
- Height (1)
- 11.00 mm
- Height (2)
- 14.00 mm
- Quantity
- 2 oil seals (pair)
- Fitment
- Aprilia RSV4 / RSV4 1100 Factory / R / RR / RF (2009–2026)
- Worldwide shipping
- Genuine parts & verified quality
- 14-day returns — in stock ships within 24h
- Personal email support
// Support
Frequently asked questions
Shipping & delivery
Estimate your shipping
Get the real shipping cost for this item to your address — the same rates as checkout.