K-Tech FSS-026 fork oil seal kit for BMW M1000RR K66 2021–2026
02 · Data & docs

The facts.

Technical data
Part NumberFSS-026
BrandK-Tech Suspension
Seal ManufacturerNOK
Inner Diameter45.00 mm
Outer Diameter58.00 mm
Height11.00 mm
Quantity2x oil seals (pair)
FitmentBMW M1000RR K66 (2021–2026)
DescriptionThe whole story▼

When lap times matter and every fork stroke must remain precise, seal integrity is non-negotiable. The K-Tech FSS-026 fork oil seal kit is engineered specifically for the BMW M1000RR K66, delivering race-ready reliability that keeps your suspension performing exactly as intended from the first corner to the final straight.

Key Features

  • OEM-replacement quality using NOK-manufactured oil seals — the same supplier trusted by leading Japanese suspension manufacturers for their durability and precision fitment
  • Exact 45.00 mm inner diameter and 58.00 mm outer diameter ensure a leak-free, perfect seal on BMW M1000RR K66 forks with no modification required
  • 11.00 mm seal height maintains correct fork fluid retention under the sustained heat and pressure of track use
  • Supplied as a pair, covering both fork legs in a single purchase for straightforward, efficient maintenance
  • Prevents oil weeping and contamination of the fork stanchions — critical for consistent damping response at race pace

Performance on Track

The M1000RR K66 is a machine that demands absolute consistency from its suspension. Even minor oil seal degradation compromises damping linearity, introduces unpredictable fork behaviour and accelerates wear on stanchions and bushings. The K-Tech FSS-026 kit addresses this directly: NOK seals are formulated to resist the thermal cycling and mechanical stress inherent in high-performance fork operation, maintaining a positive seal lap after lap. Whether you are preparing for a track day, a club race or a full competition season, fitting fresh seals with a kit built to this standard is foundational maintenance, not an afterthought.

Build Quality

K-Tech Suspension is a respected name in professional and club-level motorsport, and the components in this kit reflect that pedigree. The NOK seals chosen here are not generic aftermarket parts — NOK is the supplier of choice for original equipment suspension manufacturers across the industry, selected precisely because of their consistent dimensional accuracy and long service life. Each seal in this kit is a direct replacement that slots into the original position without adaptation, keeping your service procedure clean and straightforward.

Fitment & Compatibility

This kit is designed exclusively for the BMW M1000RR K66 covering model years 2021 to 2026. Always confirm your frame designation before fitting. Installation requires specialist tools and technical knowledge; K-Tech recommends fitment by an authorised K-Tech service centre.

Specifications

  • Part number: FSS-026
  • Brand: K-Tech Suspension
  • Seal manufacturer: NOK
  • Inner diameter: 45.00 mm
  • Outer diameter: 58.00 mm
  • Height: 11.00 mm
  • Quantity: 2x oil seals (one pair)
  • Fitment: BMW M1000RR K66 (2021–2026)
What's includedEverything in the box▼
  • 2x K-Tech fork oil seals for BMW M1000RR K66 (2021–2026)
FitmentWhich bikes this fits▼
  • BMW M1000RR K66 (2021–2026)
07 · Support

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