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YAMAHA YZF-R9 2025-2026 - Akrapovic Exhausts System - S-Y9R21-EET
£1,146.00
Model Compatibility
- Yamaha YZF-R9 (2025–2026)
- Yamaha YZF-R9 ABS (2025–2026)
Note on Engine Platform Sharing: While this exhaust mounts to the 890cc CP3 engine structure, the header sweep, high-mount exit angle, and fairing clearance brackets are exclusively designed for the R9 bodywork. It is not cross-compatible with sibling CP3 naked/touring models like the MT-09, XSR900, or Tracer 9 without heavily modifying the mounting tabs or modifying the lower fairings.
Key Performance Specifications
- Road Legality: Strictly not street legal. It functions as an un-catalysed, non-homologated full race system meant strictly for track or closed-course competition circuits.
- Materials: High-grade titanium muffler outer sleeve and end cap mated to premium stainless steel link pipes and 3-into-1 collector headers.
- Weight Reduction: Cuts 1.8 kg from the total mass compared to the restrictive 7.0 kg factory assembly.
- Performance Maximisation: Drops backpressure to unlock an extra 4.6 hp (3.4 kW) at 9,500 rpm and 3.2 Nm of torque at 5,000 rpm on the dyno.
- Sound Regulation: The system includes a Supersport-inspired side exit layout and is uniquely packaged with two interchangeable noise inserts (dB killers) so track-day riders can adapt to local circuit noise barriers.
Critical Installation Realities
- ECU Remapping Mandatory: Because this configuration deletes the primary catalytic converter and uses optimized flow dynamics, running the bike on the stock fuel map will cause it to run dangerously lean. You must apply a custom ECU flash or fuel management remap to prevent long-term engine damage and ensure smooth throttle delivery
- Track-Day Link Pipe Pairing: For riders visiting tracks with strict static noise measurements, this setup is designed to integrate natively with the Akrapovič Track Day Link Pipe Resonator (L-Y9R1/TD) to target heavily restricted dB limits without killing power.