Exhausts Yamaha R9

The Yamaha YZF-R9 has arrived to redefine the very concept of a modern supersport. Built around the 890cc CP3 inline three-cylinder engine — the same heart that made the MT-09 platform famous, but here recalibrated with a dedicated ECU map and longer final-drive ratio — the R9 is a motorcycle designed to bridge two worlds: everyday usability and track potential. The gravity-cast aluminium Deltabox frame, developed specifically for this model, is the lightest Yamaha has ever produced for a supersport, with an almost perfectly balanced front-to-rear weight distribution. Fully adjustable KYB suspension, a Brembo braking system with Stylema calipers, R1-derived electronics with a six-axis IMU: everything points to a motorcycle built for riders who mean business, with no unnecessary compromises. Those looking for Yamaha Exhausts will find on this page the solutions specifically designed for the R9, engineered to make the most of the unique character of Yamaha's triple.

What we offer for the YZF-R9 is a full exhaust system, not a simple slip-on muffler. This is a system that replaces the entire original exhaust, from the engine ports all the way to the end silencer, in a lateral configuration. Every component — headers, mid-pipes, catalytic converter where applicable, and silencer — is supplied as a single kit, complete with all the hardware and brackets required for installation. The mounting points are designed to be fully compatible with the motorcycle's original fixing locations, with no modifications needed to the frame or chassis. That said, we always recommend having the installation carried out by a qualified mechanic: a full exhaust system for Yamaha R9 requires careful attention during fitting, particularly when it comes to header alignment and the correct torque on every joint.

Replacing the entire exhaust system delivers tangible, real-world benefits. The first is weight reduction: the factory exhaust on modern motorcycles, constrained by regulations and production compromises, is often heavier than it needs to be. Swapping it for a well-designed aftermarket system noticeably lightens the bike, with direct benefits to handling and responsiveness through direction changes. Power delivery also improves in terms of smoothness: the engine breathes more freely, throttle response becomes more linear, and the triple expresses its low-to-mid-range torque with greater fluidity. And then there's the sound: the CP3's exhaust note is already one of its strongest assets, and a full exhaust system unleashes it in a fuller, more cohesive way — not excessive, but with a more defined and present tone across the entire rev range.

Our exhausts are made through handcrafted manufacturing in Lombardy, in the province of Bergamo. Each system is built to order, which means there is no warehouse of standardised products waiting to be shipped: every piece is cut, shaped, welded, and inspected individually. Quality control is carried out in-house before dispatch. Selling direct from the manufacturer, with no intermediaries, allows us to maintain a direct relationship with the customer and full control over the entire process, from raw materials to the finished product.

For the R9, the catalytic converter is available as an option that can be selected directly from the drop-down menu on each product page. The catalysed version allows road-legal use in compliance with current regulations. Removal of the catalytic converter is reserved exclusively for situations where this is permitted by law, such as track use or closed-circuit competition.

The Yamaha R9 is Euro 5+ homologated, and this point deserves a specific explanation for those choosing a full exhaust system. By replacing the entire original system, the factory catalytic section — which on the R9 houses the secondary lambda sensor — is also removed. On the latest generation of motorcycles, this sensor is particularly sensitive: its job is to monitor catalytic converter efficiency and relay data to the ECU. When the original system is removed, it is very likely that the ECU will log an anomaly and generate the P0420 fault code. In practical terms, this results in the MIL warning light coming on — the amber check engine light visible on the dashboard. It is important to understand that this is not a mechanical fault or a genuine engine malfunction: it is simply the ECU detecting a change in the operating parameters of the catalytic converter, which is now absent or replaced.

A complete solution is available in the ECUs, OBD2 Diagnostics and Lambda Kits section of the Roadsitalia catalogue. The Lambda Optimizer + AMC Automatic MIL Clear Kit combines two dedicated modules: the Lambda Optimizer connects in series between the second sensor and the original wiring, optimising fuelling at low and mid revs, while the AMC Automatic MIL Clear connects to the OBD diagnostic port and automatically manages the MIL warning light and faults such as P0420 — plug & play, no permanent modifications. The AMC Automatic MIL Clear is also available separately and acts exclusively on the MIL warning light, clearing it automatically without affecting engine performance or parameters — the simplest solution for those who simply want to eliminate the warning light. The OBD2 Diagnostic Kit connects to the motorcycle's diagnostic port and allows fault codes to be read in real time, cleared, and ECU parameters to be monitored via smartphone. It is worth knowing that extensive testing on Euro 5+ models has shown that the second lambda sensor on these engines is particularly sensitive and sometimes unpredictable: sporadically, we have recorded MIL warning light activations even on homologated and catalysed exhausts, and even on completely standard motorcycles after a simple wash. Those who want complete peace of mind in every situation may therefore wish to consider these kits regardless of their choice of catalytic converter. The non-catalysed version is in any case reserved for track or private road use, within the limits permitted by local regulations.

Every system is supplied with a standard dB killer already fitted. The dB killer is not officially removable, and its removal voids the homologation. For those seeking a further reduction in noise levels, the No-Noise option is available: this is a welded internal baffle that further reduces decibel output without drastically affecting engine performance. Where available, the No-Noise dB killer can be selected from the drop-down menu on the product page, alongside the other configuration options.

After fitting a full exhaust system, it is normal for the R9's ECU to go through an adaptation phase. The engine management system needs to acquire new operating parameters related to the different exhaust gas flow. During the first few miles, you may notice minor variations in power delivery, idle speed, or throttle response: this is a completely normal and temporary behaviour. In the vast majority of cases, an ECU remap is not required.

Production lead times, given that all items are built to order, may vary. Up-to-date lead times are always visible during the checkout process, before the final order confirmation, allowing you to assess the expected timeframe in advance. Once the system has been handed over to the courier, you will automatically receive a tracking number to follow the shipment.

If you have any questions about operation, compatibility, or configuration of your exhaust system, we invite you to consult the FAQ section of the website, where you will find answers to the most frequently asked questions. For any specific enquiry, you can reach us through the Contact page or use the live chat: we respond directly and without filters.

Below you will find the product list available for the Yamaha R9. The differences between the various models are primarily aesthetic: silencer shape, construction material, and type of finish. Catalytic converter and No-Noise dB killer, where available, can be selected from the drop-down menu within each product page. We invite you to enter the product page to view detailed photos, read the full technical specifications, and configure your full exhaust system according to your preferences.