Akrapovic exhaust Yamaha MT-09 S-Y9R15-HAPT/2 360° — drag me
02 · Data & docs

The facts.

Technical data
BrandAkrapovic
Part numberS-Y9R15-HAPT/2
FitmentYamaha MT-09 (2024–2026)
System typeRacing Line, complete system, side-exit
MaterialsHigh-grade titanium muffler outer sleeve, hand-crafted carbon fibre end cap
Other partsStainless steel link pipes and headers
Power118.1 PS (stock 116.2 PS, gain 2.0 PS at 10,000 rpm)
Torque92.3 Nm (stock 92.1 Nm, gain 1.3 Nm at 9,700 rpm)
NoteAkrapovic publishes no weight figure for this system
Road approvalEC type approval and ECE type approval
DescriptionThe whole story

A shorter muffler that exits at the side. On an MT-09 — a naked bike whose whole design is about what you can see — that is the change most owners are buying, and it comes with EC and ECE type approval rather than a track-only caveat.

Key Features

  • Complete system: headers, link pipes and muffler replace the standard exhaust path
  • Shorter muffler design, exiting on the side of the bike for visual impact
  • High-grade titanium muffler outer sleeve with a hand-crafted carbon fibre end cap
  • Stainless steel link pipes and headers, where heat cycling is worst
  • 2.0 PS more at 10,000 rpm, peak output rising to 118.1 PS
  • 1.3 Nm more at 9,700 rpm
  • EC and ECE type approved, removable noise insert supplied

Titanium or Stainless — Two Racing Lines

Akrapovic builds two complete systems for the current MT-09 and they are different products rather than two finishes. This one is titanium with a shorter, side-exit muffler and covers 2024 to 2026.

The stainless version, S-Y9R22-HKKSS, is a one-piece construction with the catalytic converter welded inside and a double outlet, and covers 2025 to 2026. Both carry EC and ECE approval. The choice comes down to the shape you want on the bike and, for a 2024 machine, to which one fits at all.

No Weight Figure Published

For most systems in this catalogue Akrapovic publishes a weight, and it appears here. For this one the manufacturer does not, and this page does not estimate one. A titanium Racing Line will be lighter than the standard steel system — but by how much is not documented, and inventing a number would be worse than leaving it out.

Where Two Horsepower Sit

10,000 rpm on the 890 cc CP3 triple is near the top of the range, and that is where this system finds its 2 PS. The MT-09 is one of the few naked bikes people actually rev, so the placement is defensible — but it is a modest figure and it is printed as measured.

The larger argument is the shape, the sound and the fact that a full system on this bike no longer costs the type approval.

Sixty Minutes on the Bench

A complete system means the standard headers, the collector and the catalytic converter all come off. On an MT-09 the tank does not have to move, but the radiator side panels do, which is why Akrapovic quotes an hour rather than the half-hour a slip-on takes.

Fitment and Compatibility

S-Y9R15-HAPT/2 covers the Yamaha MT-09 from model year 2024 through 2026. The FZ-09 is the same motorcycle under its North American name. Installation is quoted at 60 minutes.

Road Approval

EC type approval and ECE type approval, with the certificates supplied and downloadable here. The system is a legal replacement for road use in the European Union.

Specifications

  • Part number: S-Y9R15-HAPT/2
  • EAN: 3831126428884
  • Fitment: Yamaha MT-09 (2024–2026)
  • System type: Racing Line, complete system, side-exit muffler
  • Muffler outer sleeve: high-grade titanium
  • End cap: carbon fibre, hand-crafted
  • Link pipes and headers: stainless steel
  • Power: 118.1 PS (stock 116.2 PS, gain 2.0 PS at 10,000 rpm)
  • Torque: 92.3 Nm (stock 92.1 Nm, gain 1.3 Nm at 9,700 rpm)
  • Weight: not published by the manufacturer
  • Noise insert: included
  • Installation time: approx. 60 minutes
  • Road approval: EC type approval and ECE type approval
  • Country of manufacture: Slovenia
FitmentWhich bikes this fits
  • Yamaha MT-09 (2024–2026)
07 · Support

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08 · Paddock

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