
The facts.
| Part number | FSK-021 |
|---|---|
| Brand | K-Tech |
| Seal manufacturer | NOK |
| Inner diameter | 55.00 mm |
| Outer diameter | 63.00 mm |
| Contents | 2x oil seals, 2x dust covers |
| Fitment | Yamaha YZF-R1 M RN32, RN49, RN65 (2015–2026) |
| Application | Road and track |
DescriptionThe whole story▼
Engineered exclusively for the Yamaha YZF-R1 M, this K-Tech fork oil seal and dust cover kit delivers all-day confidence whether you are threading through traffic or pushing lap times at the circuit. Every seal in this kit is manufactured by NOK — the same OEM supplier trusted by the world's leading Japanese suspension manufacturers — so fit, feel, and longevity are exactly what you would expect from a premium service kit.
Key Features
- Direct OEM replacement for Yamaha YZF-R1 M fork seals and dust covers — no modification required for a perfect fit
- NOK-manufactured seals, chosen as first-fill components by top Japanese suspension OEMs for their consistent quality and long service life
- Precision inner diameter of 55.00 mm and outer diameter of 63.00 mm ensure correct seating and leak-free performance
- Dust covers effectively block road grime, water, and debris from reaching the fork internals, protecting your investment between service intervals
- Equally suited to street riding and track use — maintains optimal fork performance under sustained, demanding conditions
Build Quality & Performance
Fork seal failure is one of the quickest ways to compromise both handling and safety. Oil weeping past a worn seal upsets damping consistency and, left unchecked, contaminates the brake components below. The K-Tech FSK-021 kit addresses this directly: the NOK oil seals maintain a reliable, wiper-tight barrier around the fork stanchion across a wide temperature range, while the matched dust covers prevent the micro-abrasive particles that accelerate seal wear from ever reaching the sealing lip. The result is a fork that moves as smoothly on the hundredth kilometre of a track day as it did on the first.
Road & Track Use
The YZF-R1 M's Öhlins Electronic Racing Suspension demands seals that can keep up with its rapidly varying damping cycles. Whether the ECU is responding to mid-corner bumps on a fast road or managing kerb strikes at a race circuit, properly seated, high-quality seals are non-negotiable. This kit restores that baseline, making it a sensible inclusion in any routine fork service or pre-season rebuild.
Installation Note
Installation requires specialist tooling and technical knowledge. K-Tech recommends having this kit fitted by an authorised K-Tech Service Centre to ensure full performance and safety are maintained.
Fitment & Compatibility
This kit is designed exclusively for the M-variant of the Yamaha YZF-R1. It is not compatible with the standard YZF-R1.
- Yamaha YZF-R1 M RN32 (2015–2016)
- Yamaha YZF-R1 M RN49 (2017–2020)
- Yamaha YZF-R1 M RN65 (2021–2026)
Specifications
| Attribute | Detail |
|---|---|
| Part number | FSK-021 |
| Brand | K-Tech |
| Inner diameter | 55.00 mm |
| Outer diameter | 63.00 mm |
| Seal manufacturer | NOK |
| Contents | 2x oil seals, 2x dust covers |
| Fitment | Yamaha YZF-R1 M RN32, RN49, RN65 (2015–2026) |
What's includedEverything in the box▼
- 2x fork oil seals
- 2x dust covers
FitmentWhich bikes this fits▼
- Yamaha YZF-R1 M RN32, RN49, RN65 (2015–2026)
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Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
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