K-Tech GBS-014 fork slide bush kit for Aprilia RS 660 2020–2026
02 · Data & docs

The facts.

Technical data
BrandK-Tech
Part numberGBS-014
Inner diameter41.00 mm
Outer diameter46.00 mm
Height12.00 mm
Wall thickness2.50 mm
MaterialHardened steel with copper coating and PTFE-lined contact surfaces
Quantity supplied2 (one pair)
FitmentAprilia RS 660 (2020–2026)
DescriptionThe whole story

Precision-engineered from hardened steel with a copper coating and PTFE-lined contact surfaces, the K-Tech GBS-014 fork slide bush kit is the upgrade your Aprilia RS 660's front end deserves. Manufactured to exact OEM dimensions, these bushes replace the factory items with superior materials that deliver smoother fork action and a meaningful reduction in friction over the life of the component.

Key Features

  • Hardened steel construction with copper coating for outstanding durability and corrosion resistance
  • PTFE-coated contact surfaces minimise friction and deliver noticeably smoother fork travel
  • Machined to exact OEM tolerances — a direct, no-modification replacement for the Aprilia RS 660
  • Supplied as a pair, covering both fork legs in a single purchase
  • Premium K-Tech quality, trusted by professional suspension technicians worldwide

Build Quality and Materials

Where standard replacement bushes often rely on plain steel or basic polymer liners, the GBS-014 combines a hardened steel core with a copper intermediate coating before the final PTFE friction surface. This three-layer construction addresses the root causes of fork stiction: metal-to-metal contact, surface corrosion, and lubricant breakdown. The result is a fork that moves with the same consistency on lap fifty as it does on lap one — whether you are threading through mountain roads or pushing hard on a track day.

Each bush is machined to precise dimensional tolerances, ensuring a correct interference fit in the fork tube without the need for reworking or shimming. The inner diameter of 41.00 mm and outer diameter of 46.00 mm match the original Aprilia specification exactly, while the 12.00 mm height and 2.50 mm wall thickness replicate the OEM geometry in full.

Installation Note

Fitting these bushes requires fork disassembly, specific suspension tooling, and a working knowledge of front suspension systems. K-Tech recommends installation be carried out by an authorised K-Tech service centre to ensure correct fitting and to preserve suspension performance and rider safety.

Fitment and Compatibility

The K-Tech GBS-014 slide bush kit is designed specifically for the following model:

  • Aprilia RS 660 — model years 2020 to 2026

Specifications

Attribute Detail
Brand K-Tech
Part number GBS-014
Inner diameter 41.00 mm
Outer diameter 46.00 mm
Height 12.00 mm
Wall thickness 2.50 mm
Material Hardened steel with copper coating and PTFE-lined contact surfaces
Quantity supplied 2 (one pair)
Fitment Aprilia RS 660 (2020–2026)
What's includedEverything in the box
  • 2x fork slide bushes
FitmentWhich bikes this fits
  • Aprilia RS 660 (2020–2026)
07 · Support

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