This Showa Genuine Parts service kit includes two dust seals and two oil seals for 49 mm Showa upside-down forks. As OEM components, the seals are designed to provide the correct balance of sealing force and friction, supporting smooth, controlled fork movement without excessive drag. In modern large-diameter USD forks, seal life is influenced primarily by fork design and operating conditions; in Teknik’s experience, these genuine components represent the best compromise between performance and service life.

Why Choose Genuine Showa Fork Seals?

Fork seals play a critical role in fork feel by controlling breakaway and sliding friction as well as oil retention. Genuine Showa seals are engineered with specific compounds and lip geometry to deliver the intended friction characteristics for the fork design, rather than prioritising maximum seal life at the expense of suspension sensitivity. This balance is especially important on modern USD forks where excessive sealing force can lead to harsh initial movement and poor compliance.

Key Features

  • Genuine Showa oil seals and dust wipers for 49 mm USD forks
  • Designed to achieve the correct balance of sealing force and friction
  • Supports smooth breakaway and controlled sliding movement
  • Maintains intended fork feel without excessive sealing drag
  • OEM components used in original Showa fork assemblies

Specifications

  • Brand: Showa Genuine Parts
  • Category: Suspension Service Components
  • Subtype: Fork Seal & Wiper Kit
  • Fork Size: 49 mm
  • Contents: 2 oil seals, 2 dust seals
  • Fitment: Common on selected Showa 49 mm upside-down fork assemblies. Refer to TKB-verified model and year compatibility.

OEM vs Aftermarket Seal Options

We also offer aftermarket alternatives such as SKF fork seals, which are designed to deliver marginally lower friction and can feel slightly freer in initial movement. In practice, the friction difference at assembly is small and often difficult to define, as grease choice and installation method have a far greater influence. Where SKF seals tend to show an advantage is as the fork ages and assembly grease dries out, although this typically comes with reduced seal life in real-world off-road use. In Teknik’s experience, genuine OEM seals provide the most balanced solution for the majority of riders.

Assembly and Grease Choice

Initial fork feel and seal performance are heavily influenced by assembly method and grease selection. The choice of assembly grease has a far greater impact on breakaway and sliding friction than small differences between seal designs. For best results, we recommend installing fork seals using a purpose-designed suspension grease such as Showa Genuine Parts Technical Suspension Grease or KYB Assembly Grease, rather than general-purpose lubricants.

Upgrade Your Ride

Fork seal replacement is best carried out as part of a complete suspension service. Pair this kit with suitable oils and tools from our suspension oils and lubricants and motorcycle suspension tools ranges to ensure correct installation and long-term performance.

SKU FSER04901
Barcode # 8435622720104
Brand Showa Genuine Parts
Shipping Weight 0.0900kg
Shipping Size 0.054 x 0.025 x 0.054m
Type Front Fork Service Kit
See our Shipping Information See our Frequently Asked Questions

If your Motorcycle is listed below, this product will suit:

Fork Inner Tube Ø d (mm) 49.0

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