⟲ 360° — drag meThe facts.
| Brand | Akrapovic |
|---|---|
| Part number | S-K9SO11-HZT |
| Fitment | Kawasaki Z900 and Z900 SE (2025–2026) |
| Line | Slip-On Line (Titanium) |
| Material | High-grade lightweight titanium |
| 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 insert included |
| Road approval | EC and ECE type approval, plus EPA |
DescriptionThe whole story▼
This is the titanium version. Akrapovic builds the same silencer for the 2025 Z900 in two materials, and the choice between them is a question of appearance and price rather than performance — the published figures are identical.
Key Features
- High-grade lightweight titanium construction
- Silencer down to 2.04 kg — Kawasaki fits one weighing 4.12
- Output rises to 120.8 PS and 96.4 Nm, both read off at 9,500 rpm
- A shorter, tapered body in place of Kawasaki's box
- Comes with an insert you can take out
- EC and ECE type approved, plus EPA
- Half an hour of work, no tools beyond a socket set
Titanium or Carbon
The carbon version, S-K9SO11-HZC, weighs the same and makes the same power. What differs is the surface: carbon stays matt black and shows a weave; titanium starts grey and takes on blue and gold heat colours over the first few rides, and never looks the same twice.
Titanium is also the less expensive of the two here. If the finish is not the deciding factor, this is the sensible half of the choice.
What Fifty Per Cent Means on This Bike
Kawasaki's standard silencer on the 2025 Z900 weighs 4.12 kg — lighter than the previous generation's, because Euro 5+ pushed the emissions hardware forward into the headers instead. Half of what is left comes off here.
2.08 kg from behind the rider's right leg is a small number that sits in an expensive place.
Approved, and With an Insert
EC and ECE approval are both in place, so no entry in the vehicle documents is needed. The removable insert belongs in place for road use: without it the exhaust no longer matches the condition in which it was approved.
Heat Colours Over Time
Bare titanium does not stay grey. Over the first few hundred kilometres the area nearest the link pipe turns straw, then blue, then purple, and the pattern depends on how the bike has been ridden. No two silencers end up looking the same.
Some owners want exactly that and some find it untidy. It is the single real difference between this and the carbon version.
Add the Heat Shield
P-HSK9SO2 is the carbon heat shield for the 2025 Z900. Fitted alongside a titanium silencer it is a deliberate contrast rather than a match — worth deciding on before ordering both.
The Cheaper of the Two
Titanium costs less here than carbon does, which surprises people who assume the exotic material is always the expensive one. Carbon parts are hand-laid and each one takes labour; a titanium sleeve is formed and welded.
Same weight, same figures, lower price. The carbon version earns its premium on appearance alone.
Fitment and Compatibility
S-K9SO11-HZT covers the Kawasaki Z900 and Z900 SE for model years 2025 and 2026. Earlier machines take S-K9SO6-HZT or, for the A2 version, S-K9SO10-HZT.
Specifications
- Part number: S-K9SO11-HZT
- EAN: 3831126440817
- Bikes covered: Kawasaki Z900 and Z900 SE, model years 2025 and 2026
- Line: Slip-On Line (Titanium)
- Made of: titanium, high grade and light
- Weight: 2.04 kg fitted, 4.12 kg standard — 2.08 kg saved, half the original
- Power: up to 120.8 PS from 118.6 standard, read at 9,500 rpm
- Torque: up to 96.4 Nm from 95.3 standard, read at the same point
- Insert: supplied, removable by hand
- Workshop time: roughly half an hour
- Approval: type approved to EC and ECE, plus EPA
- Country of manufacture: Slovenia
FitmentWhich bikes this fits▼
- Kawasaki Z900 and Z900 SE (2025–2026)
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