K-Tech FSS-005 fork oil seals kit for Yamaha YZF-R7 2021–2026
02 · Data & docs

The facts.

Technical data
BrandK-Tech
Part NumberFSS-005
Seal ManufacturerNOK
Inner Diameter41.00 mm
Outer Diameter53.00 mm
Height (1)8.00 mm
Height (2)10.50 mm
Quantity2 oil seals (pair)
FitmentYamaha YZF-R7 (2021–2026)
DescriptionThe whole story

Keeping your Yamaha YZF-R7's fork running smoothly and leak-free is one of the most cost-effective pieces of maintenance you can do, and the K-Tech FSS-005 oil seals kit makes it straightforward. Manufactured by NOK — the supplier of choice for every major Japanese suspension manufacturer — these seals are a direct OEM-specification replacement that restore proper fork function without compromise.

Key Features

  • NOK-manufactured seals, trusted by all major Japanese suspension OEMs for their consistency and service life
  • Exact OEM dimensions (41.00 x 53.00 x 8.00/10.50 mm) — drop-in fitment with no modification required
  • Supplied as a pair, covering both fork legs in a single purchase for a complete service
  • Prevents oil weeping and contamination of the brake system, maintaining safe, consistent suspension action
  • Direct replacement for Yamaha YZF-R7 (2021–2026) original fork seals — no performance compromise, just reliable sealing

Reliable Everyday Performance

For riders who use their YZF-R7 day in, day out — commuting, weekend blasts, or the occasional track day — a leaking fork seal is the kind of niggling fault that compounds over time. Oil on the stanchion attracts grit, accelerates wiper wear, and eventually finds its way to the front brake. The FSS-005 kit addresses this at the source. NOK produces seals to tight dimensional tolerances, so the lip contact pressure and lip geometry replicate what left the Yamaha factory. The result is a fork that feels as it should: controlled, progressive, and oil-tight.

Quality You Can Trust

NOK's reputation in the suspension industry is built on decades of supply to OEM programmes across Japan and Europe. K-Tech packages these seals specifically for the YZF-R7 fork specification, meaning you are not sourcing a generic seal and hoping for the best. The part number FSS-005 is a confirmed fit for the 2021–2026 model range — simply order, service, and ride.

Installation Note

Installation should be carried out by an authorised K-Tech service centre. Specialist tools and technical knowledge are required to ensure the full performance and safety of this product.

Fitment & Compatibility

  • Yamaha YZF-R7 (2021, 2022, 2023, 2024, 2025, 2026)

Specifications

Part Number FSS-005
Brand K-Tech
Seal Manufacturer NOK
Inner Diameter 41.00 mm
Outer Diameter 53.00 mm
Height (1) 8.00 mm
Height (2) 10.50 mm
Quantity 2 oil seals (pair)
Fitment Yamaha YZF-R7 (2021–2026)
What's includedEverything in the box
  • 2x K-Tech fork oil seals for Yamaha YZF-R7 (2021–2026)
FitmentWhich bikes this fits
  • Yamaha YZF-R7 (2021–2026)
07 · Support

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08 · Paddock

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