Akrapovic exhaust Kawasaki Z900 S-K9SO11-HZC 360° — drag me
2.04 k g
02 · Data & docs

The facts.

Technical data
BrandAkrapovic
Part numberS-K9SO11-HZC
FitmentKawasaki Z900 and Z900 SE (2025–2026)
LineSlip-On Line (Carbon)
MaterialsHand-crafted carbon fibre body and end cap
Weight2.04 kg (stock 4.12 kg, saving 2.08 kg / 50.5 %)
Power120.8 PS (stock 118.6 PS, gain 2.3 PS at 9,500 rpm)
Torque96.4 Nm (stock 95.3 Nm, gain 1.8 Nm at 9,500 rpm)
Noise insertRemovable insert included
Road approvalEC and ECE type approval, plus EPA
DescriptionThe whole story

Half the weight, and a more compact shape. Akrapovic redesigned this silencer for the 2025 Z900 to sit closer to the bike, and on a naked motorcycle with nothing to hide behind, the proportions matter as much as the 2.08 kg.

Key Features

  • 2.04 kg against the standard 4.12 kg: 2.08 kg and 50.5 per cent less
  • More compact shape, matched to the bike's naked and sporty lines
  • Hand-crafted carbon fibre parts with a carbon end cap
  • 2.3 PS and 1.8 Nm more, both at 9,500 rpm
  • Power and torque increases through the range
  • Removable noise insert included
  • EC and ECE type approved, plus EPA

The 2025 Z900 Is a Different Bike

Kawasaki reworked the Z900 for 2025 with new bodywork, a revised chassis and more power — 118.6 PS against the previous generation's 111.9. The exhaust changed with it, so a silencer for the older machine will not fit.

Check the model year before ordering. The Z900 name has covered three distinct exhaust interfaces since 2017.

Hand-Crafted Carbon

Akrapovic specifies the carbon parts as hand-crafted, including the end cap in the same material. On a carbon slip-on that is the difference between a wrapped tube and a moulded component — the weave lines up at the seams and the shape is the shape it was designed to be.

It is also why a carbon silencer costs more than a titanium one of the same size.

Legal, With an Insert

EC and ECE approval are both in place, so the exhaust needs no paperwork. A removable noise insert ships with it: fitted, the system stays within its approved noise figure; removed, it no longer matches the condition it was approved in and belongs on a circuit.

Carbon or Titanium

Akrapovic builds this silencer in both materials for the 2025 Z900. The carbon version is the lighter and the more visually distinct; the titanium one costs slightly less and takes on colour with heat.

Neither is faster than the other. The choice is what you want the back of the motorcycle to look like.

Thirty Minutes and No ECU Work

A slip-on leaves the headers, the catalytic converter and the engine management exactly as Kawasaki set them. Half an hour with the bike on a stand, and nothing to reprogram afterwards.

Two Kilograms From the Tail

The Z900's silencer hangs off the right side behind the rider. Taking 2.08 kg out of that position is the single most effective weight reduction available on the bike for the money, and it is visible from three metres away.

Fitment and Compatibility

S-K9SO11-HZC covers the Kawasaki Z900 and Z900 SE for model years 2025 and 2026. Installation is quoted at 30 minutes.

Specifications

  • Part number: S-K9SO11-HZC
  • EAN: 3831126440572
  • Fitment: Kawasaki Z900, Z900 SE (2025–2026)
  • Line: Slip-On Line (Carbon)
  • Materials: hand-crafted carbon fibre, carbon end cap
  • Weight: 2.04 kg (stock 4.12 kg, saving 2.08 kg / 50.5 %)
  • Power: 120.8 PS (stock 118.6 PS, gain 2.3 PS at 9,500 rpm)
  • Torque: 96.4 Nm (stock 95.3 Nm, gain 1.8 Nm at 9,500 rpm)
  • Noise insert: removable, included
  • Installation time: approx. 30 minutes
  • Road approval: EC and ECE type approval, EPA
  • Country of manufacture: Slovenia
FitmentWhich bikes this fits
  • Kawasaki Z900 and Z900 SE (2025–2026)
07 · Support

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08 · Paddock

Before you go.

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