K-Tech SBS-003 fork slide bush kit for Kawasaki ZX-4RR 2023–2026
02 · Data & docs

The facts.

Technical data
BrandK-Tech
Part NumberSBS-003
Inner Diameter35.70 mm
Outer Diameter37.70 mm
Height20.00 mm
Wall Thickness1.00 mm
MaterialHardened steel with copper and PTFE coating
Quantity2 slide bushes
FitmentKawasaki ZX-4RR (2023–2026)
DescriptionThe whole story

When lap times demand the most from your ZX-4RR's front end, every component in the fork assembly matters. The K-Tech SBS-003 slide bush kit is precision-engineered specifically for the Kawasaki ZX-4RR (2023–2026), restoring factory-accurate fork movement and delivering the kind of consistent, progressive damping feel that separates a well-sorted racebike from a compromised one.

Key Features

  • Exact OEM-specification fitment developed exclusively for the Kawasaki ZX-4RR (2023–2026) — no adaptation required
  • Hardened steel construction with a copper coating provides outstanding resistance to wear and corrosion under repeated, high-load fork cycles
  • PTFE-coated contact surfaces minimise friction throughout the full stroke, delivering smoother, more predictable fork action on track
  • Precise dimensional tolerancing ensures correct oil film distribution and consistent damping response, lap after lap
  • Complete two-bush kit covers a full fork service in one purchase

Track Performance & Build Quality

On a high-revving, lightweight four-cylinder machine like the ZX-4RR, fork precision directly influences corner entry confidence and mid-corner balance. Worn or under-spec slide bushes introduce lateral play into the fork legs, corrupting the feedback loop between tyre and rider. The K-Tech SBS-003 eliminates that variable with a hardened steel shell dimensioned to match the OEM bore — inner diameter 35.70 mm, outer diameter 37.70 mm, height 20.00 mm, wall thickness 1.00 mm — while the PTFE-impregnated surface lining keeps stiction to an absolute minimum even as fork oil temperature rises through a long session.

Whether you are chasing personal bests at a club day or running a full race weekend, fresh slide bushes restore the factory damping characteristic that K-Tech suspension components are tuned around. Combined with a K-Tech cartridge or service kit, the SBS-003 forms the foundation of a properly rebuilt front end.

Installation Note

Fitting requires specialised fork tools and techniques. K-Tech recommends installation by an authorised K-Tech Service Centre to ensure full performance and safety are achieved. Incorrect installation can compromise fork function and rider safety.

Fitment & Compatibility

This kit is designed exclusively for the following model:

  • Kawasaki ZX-4RR — model years 2023, 2024, 2025, 2026

Do not attempt to fit this kit to any other model or year range without verification from K-Tech.

Specifications

Specification Detail
Part Number SBS-003
Inner Diameter 35.70 mm
Outer Diameter 37.70 mm
Height 20.00 mm
Wall Thickness 1.00 mm
Material Hardened steel with copper and PTFE coating
Quantity in kit 2 slide bushes
Fitment Kawasaki ZX-4RR (2023–2026)
What's includedEverything in the box
  • 2x K-Tech slide bushes
FitmentWhich bikes this fits
  • Kawasaki ZX-4RR (2023–2026)
07 · Support

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08 · Paddock

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