Öhlins STX 46 Supersport Shock Absorber Kawasaki ZX-4 RR (2024–2025) – view 4⟲ 360° — drag me
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part NumberKA 401
FitmentKawasaki ZX-4 RR (2024–2025)
Road ApprovalABE (Germany)
Mounting PositionRear
Length307,5 +4/-2 mm
Stroke49,5 mm
Spring Rate90 N/
Piston Diameter36 mm
Spring Part Number01093-29
DescriptionThe whole story▼

Fitted to the Kawasaki ZX-4 RR (2024–2025), the Öhlins KA 401 replaces the standard unit outright. A factory shock is set for an average rider on an average road, and few riders are either.

Key Features

  • Gas-pressurised damper with a piggyback external reservoir
  • Remote hydraulic spring-preload adjuster on a flexible hose
  • Adjustable rebound damping through a dedicated click adjuster on the damper body
  • Adjustable overall length for ride-height and geometry changes
  • Adjustable compression damping via the gold click adjuster
  • Twin-tube TTX damper layout
  • Delivered with a 90 N/mm spring, selected for the ZX-4 RR
  • Öhlins 36 mm piston

Damping Performance

49,5 mm is the stroke Öhlins specifies against the ZX-4 RR's ratio. Spring 01093-29 is what ships with the damper; harder and softer rates are available. Öhlins fits a 90 N/mm spring to this number; riders far from average weight should expect to change it. Öhlins gives 307,5 +4/-2 mm of length adjustment, which is the cleanest way to alter the ZX-4 RR's attitude. The two adjusters do genuinely separate jobs, which is what makes methodical setup possible. The adjuster range is usable end to end rather than only around the middle.

Materials and Manufacture

Öhlins machines its own critical components instead of buying them in, and the tolerances are where the money goes. The eyelets carry spherical bearings rather than rubber bushes, so the damper is not fighting its own mounting. Öhlins sets a baseline for each part number on the machine it was developed on, so it works before anything is adjusted.

About the STX 46 Supersport Range

Length adjustment lets rear ride height be raised to quicken the steering. The 46 mm piston and monotube body carry over from the Street version; the shim stack does not. Öhlins sets this specification for machines ridden hard on good surfaces.

Setting It Up for the ZX-4 RR

On a supersport machine, front-end feel under braking is what the rider trusts, and damping is what provides it.

Fitment and Compatibility

This listing covers Öhlins part number KA 401 for the Kawasaki ZX-4 RR, 2024–2025. 2 machines in the range take this number, the Kawasaki ZX-4 RR among them.

Road Approval

Road approval: ABE (Germany). The unit is covered by a German ABE for the Kawasaki ZX-4 RR, so no individual inspection or entry in the vehicle documents is required. The approval document ships with the product.

Fitting and Setup Service

Öhlins suspension rewards careful fitting. We recommend having the work done by an authorised Öhlins service centre — and we are one ourselves: we fit, service and set up Öhlins components in house. If you would like us to handle the installation, just ask and we will quote it with the order.

Specifications

  • Brand: Öhlins
  • Part Number: KA 401
  • Fitment: Kawasaki ZX-4 RR (2024–2025)
  • Road Approval: ABE (Germany)
  • Mounting Position: Rear
  • Length: 307,5 +4/-2 mm
  • Stroke: 49,5 mm
  • Spring Rate: 90 N/mm
  • Piston Diameter: 36 mm
  • Spring Part Number: 01093-29
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
  • Kawasaki ZX-4 RR (2024–2025)
07 · Support

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08 · Paddock

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