The facts.
| 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 Supplied | 2 oil seals (pair) |
| Fitment | Ducati Panigale V4 R (2019–2021) |
DescriptionThe whole story▼
When race-day precision is non-negotiable, the K-Tech FSS-021 Oil Seals Kit gives the Ducati Panigale V4 R's fork legs the sealing integrity they demand. Manufactured by NOK — the Japanese seal specialist trusted by the world's leading suspension builders — this pair of fork oil seals is engineered to maintain consistent damping performance lap after lap, eliminating the pressure loss and fork-leg contamination that degrade high-speed handling.
Key Features
- NOK-manufactured fork oil seals: the benchmark choice of top-tier Japanese suspension OEMs for proven longevity under race conditions
- Exact-fit geometry (43.00 x 55.10 x 11.00/14.00 mm) engineered specifically for the Panigale V4 R fork internals — no adaptation required
- Supplied as a matched pair so both fork legs are serviced simultaneously, preserving balanced damping response
- Prevents fork oil weeping and contamination of the brake caliper and tyre — critical at track speeds where any fluid ingress becomes a safety hazard
- Drop-in OEM-specification replacement, making scheduled fork service straightforward at an authorised K-Tech centre
Performance at the Track
The Ducati Panigale V4 R is a homologation-special built around Superbike World Championship demands, and its fork seals must match that brief. K-Tech selected NOK compounds that resist the thermal cycling of back-to-back track sessions and the constant micro-movement generated by aggressive braking and corner-entry loads. Worn or weeping fork seals introduce unpredictable fork action precisely when the rider needs feedback they can trust; replacing them with the FSS-021 kit restores the fork to its designed operating envelope.
Precision Dimensions
The seals measure 43.00 mm inner diameter, 55.10 mm outer diameter, with dual heights of 11.00 mm and 14.00 mm — tolerances that ensure a positive lip contact with the fork stanchion without excessive drag, preserving the low-friction feel the Panigale V4 R chassis is tuned around.
Installation Note
These seals are compatible exclusively with the R variant of the Ducati Panigale V4; they are not a direct fit for standard V4 or V4 S models. Installation requires specialist tooling and technical knowledge. K-Tech recommends fitting be carried out by an authorised K-Tech Service Centre to ensure full performance and safety are realised.
Fitment & Compatibility
- Ducati Panigale V4 R — 2019, 2020, 2021
Specifications
| Attribute | Detail |
|---|---|
| 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 Supplied | 2 oil seals (pair) |
| Fitment | Ducati Panigale V4 R (2019–2021) |
What's includedEverything in the box▼
- 2x K-Tech Oil Seals (FSS-021) for Ducati Panigale V4 R (2019–2021)
FitmentWhich bikes this fits▼
- Ducati Panigale V4 R (2019–2021)
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