The facts.
| Brand | K-Tech |
|---|---|
| Part Number | FSS-012 |
| Inner Diameter | 43.00 mm |
| Outer Diameter | 54.00 mm |
| Height (1) | 9.50 mm |
| Height (2) | 10.50 mm |
| Quantity | 2x oil seals |
| Seal Technology | NOK / SHOWA |
| Fitment | MV Agusta F3 675/800 (2012–2026) |
DescriptionThe whole story▼
Engineered to NOK and SHOWA specifications, the K-Tech FSS-012 fork oil seal kit is a direct OEM-grade replacement built from materials that outlast standard seals in both road and track environments. Every dimension is matched precisely to the MV Agusta F3 675/800 fork internals, so installation is straightforward and the result is a fork that feels and behaves exactly as intended.
Key Features
- NOK and SHOWA co-developed sealing technology ensures exceptional material integrity and resistance to heat, wear and aggressive fork oils.
- Exact-fit dimensions (43 mm inner diameter, 54 mm outer diameter) eliminate the guesswork of aftermarket fitment — the seals locate correctly first time.
- Dual-lip design guards against both oil weeping and dust ingress, protecting the fork legs and maintaining consistent damping feel.
- Direct OEM replacement: no modification, no adapters — the kit slots in wherever the factory seals are removed.
- Kit supplies two seals, covering both fork legs in a single purchase.
Build Quality and Materials
K-Tech sources these seals from NOK, the same supplier used by leading fork manufacturers including SHOWA. The compound is formulated to resist swelling and hardening across the wide temperature range a motorcycle fork experiences — from a cold winter commute to sustained track sessions. The precision-ground lip geometry maintains consistent contact pressure against the fork stanchion, preventing the micro-leaks that gradually compromise damping performance and contaminate brake components.
The outer diameter and lip profile conform to the same tolerances as the original MV Agusta parts, so the seals seat fully in the fork leg housing without requiring persuasion or risk of distortion during fitting.
Performance on Road and Track
A weeping fork seal is not merely cosmetic: oil migrating down a stanchion alters the effective damping rate, coats the front tyre and creates a safety hazard. The FSS-012 kit restores the fork to its designed operating condition, returning accurate steering feedback and consistent braking stability — qualities that matter acutely on a machine as responsive as the MV Agusta F3 675/800.
Fitment and Compatibility
This kit is specifically engineered for the following models:
- MV Agusta F3 675 — 2012 to 2026
- MV Agusta F3 800 — 2012 to 2026
Installation requires specialist fork tooling and technique. K-Tech recommends fitting to be carried out by an authorised K-Tech service centre or a qualified suspension technician.
Specifications
| Part Number | FSS-012 |
|---|---|
| Inner Diameter | 43.00 mm |
| Outer Diameter | 54.00 mm |
| Height (1) | 9.50 mm |
| Height (2) | 10.50 mm |
| Quantity | 2x oil seals |
| Seal Technology | NOK / SHOWA |
| Fitment | MV Agusta F3 675/800 (2012–2026) |
What's includedEverything in the box▼
- 2x fork oil seals
FitmentWhich bikes this fits▼
- MV Agusta F3 675/800 (2012–2026)
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