The facts.
| Brand | K-Tech |
|---|---|
| Seal manufacturer | NOK |
| Part number | FSK-005 |
| Inner diameter | 41.00 mm |
| Outer diameter | 53.00 mm |
| Contents | 2x oil seals, 2x dust caps |
| Fitment | Yamaha YZF-R3 (2015–2018) |
DescriptionThe whole story▼
Manufactured by NOK — the world's leading OEM supplier of fork seals to Japan's top motorcycle brands — the K-Tech FSK-005 fork oil seal and dust cap kit delivers the kind of precision fit and long-term sealing performance that cheap aftermarket alternatives simply cannot match. If your Yamaha YZF-R3 is weeping fork oil or showing signs of worn seals, this is the restoration kit worth fitting.
Key Features
- Produced by NOK, the global benchmark for fork sealing technology and original equipment supplier to major Japanese manufacturers
- Precision-machined to exact 41.00 mm inner diameter and 53.00 mm outer diameter for a perfect, leak-free fit on the YZF-R3 fork tubes
- Two oil seals included to maintain consistent damping performance and prevent fork oil loss at both legs
- Two dust caps provide an effective barrier against dirt, water and road debris, extending the service life of the fork internals
- K-Tech part number FSK-005 — direct, no-modification fitment for the Yamaha YZF-R3 (2015–2018)
Build Quality and Materials
NOK seals are the quiet professionals of suspension maintenance. Where generic replacement seals rely on lower-grade compounds and looser tolerances, NOK's manufacturing process holds dimensions to exacting standards — the same standards that earn them a place on production lines at Yamaha, Honda, Kawasaki and Suzuki. The result is a seal that conforms correctly to the fork tube surface from the first moment of installation, resisting bypass, suppressing micro-leaks and holding up through temperature cycling and sustained track use alike. The companion dust caps complete the picture, keeping abrasive particles well clear of the sealing lip and the polished stanchion surface beneath it.
Performance and Ride Impact
A leaking or degraded fork seal does more than leave an oily smear on your stanchion — it robs the suspension of the consistent oil volume it needs to deliver predictable damping. Fitting fresh NOK seals through this K-Tech kit restores the fork to its intended operating condition, giving back the precise front-end feel the YZF-R3 was designed to provide whether you are threading through town traffic or carrying speed into a track-day corner.
Installation Note
Correct installation requires specialised tools and a working knowledge of inverted or conventional fork service procedures. K-Tech recommends that this kit be fitted by an authorised K-Tech Service Centre to ensure the seals are seated to the correct depth and that the fork is reassembled to the manufacturer's torque specifications.
Fitment and Compatibility
This kit is designed exclusively for the following application:
- Yamaha YZF-R3 — model years 2015, 2016, 2017 and 2018
Specifications
| Attribute | Detail |
|---|---|
| Brand | K-Tech |
| Seal manufacturer | NOK |
| Part number | FSK-005 |
| Inner diameter | 41.00 mm |
| Outer diameter | 53.00 mm |
| Contents | 2x oil seals, 2x dust caps |
| Fitment | Yamaha YZF-R3 (2015–2018) |
What's includedEverything in the box▼
- 2x fork oil seals
- 2x dust caps
FitmentWhich bikes this fits▼
- Yamaha YZF-R3 (2015–2018)
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