
The facts.
| Brand | K-Tech |
|---|---|
| Part number | FSK-019 |
| Seal manufacturer | NOK |
| Inner diameter | 43.00 mm |
| Outer diameter | 55.00 mm |
| Contents | 2x oil seals, 2x dust caps |
| Fitment | Yamaha YZF-R1 (2003–2026) |
| Installation | Authorised K-Tech service centre recommended |
DescriptionThe whole story▼
Engineered specifically for the Yamaha YZF-R1 across every generation from 2003 to 2026, the K-Tech FSK-019 fork oil seal and dust cap kit delivers the kind of all-day confidence that only a precision-fit, premium-quality seal set can provide. Sourced from NOK — one of the most respected seal manufacturers in the industry — every component in this kit is built to maintain your suspension's performance mile after mile, season after season.
Key Features
- Precision NOK-manufactured oil seals engineered for a consistent, leak-free fit across the full 2003–2026 YZF-R1 range
- Two oil seals (43.00 mm inner diameter / 55.00 mm outer diameter) prevent fork oil loss and protect internal components
- Two dust caps shield the fork legs from dirt, grit, and moisture, extending seal service life significantly
- Exact OEM-matching dimensions ensure a straightforward installation with no modification required
- Direct replacement for worn or weeping fork seals — restores suspension feel and handling precision
Build Quality & Performance
NOK's reputation in the sealing industry is built on tight manufacturing tolerances and materials that maintain elasticity under repeated compression and temperature cycling. The oil seals in the FSK-019 kit retain fork oil under all riding conditions — from a spirited road run to sustained track use — while the paired dust caps form the first line of defence against the contamination that accelerates fork wear. Using a matched kit from a single manufacturer means both sealing layers work in harmony, which is exactly the kind of detail that separates a properly maintained suspension from one that merely functions.
Fitment & Compatibility
This kit fits the Yamaha YZF-R1 for model years 2003 through to 2026. The 43.00 mm inner diameter and 55.00 mm outer diameter match the fork tube specification used across this entire production run. If you are unsure whether your specific build year or fork specification is covered, confirm with an authorised K-Tech service centre before ordering.
Installation Note
Installation should be carried out exclusively by an authorised K-Tech service centre. Specialist tools and technical knowledge are required for correct fitting. Attempting installation without the appropriate equipment risks damage to the fork tubes or incorrect seating of the seals.
Specifications
- Part number: FSK-019
- Brand: K-Tech
- Seal manufacturer: NOK
- Inner diameter: 43.00 mm
- Outer diameter: 55.00 mm
- Contents: 2x oil seals, 2x dust caps
- Fitment: Yamaha YZF-R1 (2003–2026)
What's includedEverything in the box▼
- 2x fork oil seals (NOK)
- 2x dust caps
FitmentWhich bikes this fits▼
- Yamaha YZF-R1 (2003–2026)
Questions, one topic at a time.
Get the real shipping cost for this item to your address — the same rates as checkout.
Choose a destination and hit Estimate — we fetch the live rates for this item.
We’re based in Germany. Standard delivery goes by DHL and national postal services and takes about 2–5 days within Germany, 1–2 weeks within the EU and 2–6 weeks outside the EU. Need it sooner? Express delivery reaches most of the world within a few days — just choose it at checkout where available.
Your exact shipping cost is calculated by destination and weight and shown at checkout before you pay — no hidden fees. Express delivery is selectable at checkout where available.
Yes, we ship to over 130 countries. Prices, taxes and delivery times for your destination are calculated automatically at checkout.
Within the EU, no — our prices already include all duties and EU VAT. For deliveries outside the EU (e.g. Switzerland, the UK or the USA), your order may be subject to import duties and taxes set by your country. These are collected by the carrier when your parcel arrives, aren’t included in our prices, and are outside our control.
As soon as your parcel ships we email you a tracking link, so you can follow it all the way to your door.
On out-of-stock items you can request a delivery time or leave your email to be notified the moment it returns — just use the notification box on the product.
You have the right to cancel within 14 days of receiving your order. Register your return by email first; once it’s approved you have a further 14 days to send the goods back. Items should be unused and in their original packaging.
Register your return by email with your order number before sending anything back, and we’ll send you the return instructions. Please note: returns that aren’t registered in advance can’t be accepted.
The quickest way is to place a new order for the size you need and register a return for the original by email — just let us know it’s an exchange.
We’re sorry — that shouldn’t happen. Contact us with your order number and a photo as soon as you can, and we’ll arrange a replacement or refund right away. Faulty goods are always covered by your statutory warranty.
Refunds go back to your original payment method, usually within 3–5 working days of your return reaching our warehouse.
PayPal, all major credit and debit cards (Visa, Mastercard, American Express), Klarna (pay later and instalments), Apple Pay, Google Pay and more — all processed securely via PayPal and Mollie.
Yes. Choose Klarna at checkout to split your purchase into flexible monthly installments.
Your payment is taken when you place your order. If you choose Klarna, you pay later according to Klarna’s terms.
Every payment runs over an SSL-encrypted connection through certified providers. We never see or store your full card details.
If your order hasn’t shipped yet, contact us as soon as possible and we’ll do our best to change or cancel it.
No — you can check out as a guest. An account simply lets you track orders and reorder faster.
For customers in the EU, prices are shown including your country’s local VAT. For customers outside the EU, prices are shown without VAT — instead, your country’s import taxes and duties may apply on delivery (see the customs question).
Yes. Your invoice is attached to your order confirmation email and is also available in your account.
Yes. We’re an authorised dealer, so every product is 100% original and comes with the full manufacturer warranty.
Yes. Everything we sell is genuine and comes with the manufacturer’s warranty, on top of your statutory rights. Keep your invoice as proof of purchase and contact us if you ever need to make a claim — we’ll help you through it.
Our team is happy to help. Use the contact button below and we’ll personally help you choose the right gear or part.
Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
Yes — it’s tested and approved to the current ECE 22.06 standard and road-legal across the EU.
Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
Yes — the cheek pads are channelled so the arms of your glasses slide in comfortably.
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.
Our team will personally help you choose the right gear or part — around 24h for a reply.