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Roadsitalia Exhaust
The XT 660 X and XT 660 R share everything from the engine upwards: a 659cc single-cylinder with liquid cooling, four valves, electronic fuel injection — the first application of this technology on a Yamaha single — and a dual catalytic converter integrated into the exhaust system to meet Euro emissions standards. Below the engine, however, the two bikes are separate worlds: the X is a supermotard with 17-inch wheels, a low seat and suspension tuning oriented towards sporting road use; the R is an enduro-tourer with a 21-inch front wheel, greater suspension travel and a mixed-terrain vocation. Same heart, two characters. The fuel-injected single delivers 48hp with torque available from low revs, a characteristic that on both versions translates into direct, engaging riding. On these compact engines with their rounded sound, a sports exhaust brings a perceptible transformation: the voice opens up, the note becomes defined, and every throttle input becomes more communicative. Our sports exhausts are designed to bring out that character. You can find the full range in the dedicated section for exhausts for Yamaha on our website.
The products in this category are sports exhausts designed to replace the two original end cans on the XT 660 X and XT 660 R. The work concerns the right and left lateral silencers only: the original headers and the front section of the exhaust system remain in place. Fitting is carried out on the bike's original mounting points with no special adapters required, and each pair of exhausts is supplied with a complete fitting kit. To ensure a proper seal and correct alignment on both sides, we recommend having the installation carried out by a qualified mechanic.
The weight saving over the original end cans is noticeable on both sides and helps make the bike more agile — a particularly meaningful benefit on a supermotard like the X or a mixed-road bike like the R. In terms of sound, the XT 660 single-cylinder — already round and present-voiced — gains a more open and defined note with the two sports exhausts, with a richer tone that enhances the character of the engine in everyday riding conditions. In terms of behaviour, a different management of exhaust gas flow can favour a more direct throttle response and, in certain riding conditions, a greater feeling of engine readiness.
Two sleeve lengths are available for this category: 285 mm and 400 mm. The difference is primarily aesthetic and relates to lateral bulk, allowing you to find the visual proportions that best suit your bike. The choice applies to both silencers, which are always supplied as a matching pair. Both versions share the same construction characteristics.
We build every exhaust in our workshop with handcrafted manufacturing in Lombardy, in the province of Bergamo. Each piece is made to order and goes through internal quality control before dispatch. We operate direct from the manufacturer, without intermediaries: a direct relationship that allows us to maintain consistent quality standards and give every order the attention it deserves.
The original XT 660 X and XT 660 R are fitted with a dual catalytic converter integrated into the exhaust system. Our sports exhausts for these models are available with or without catalytic converter: those who want to maintain emissions compliance and preserve the behaviour of the lambda sensor can choose the catalysed version; those who prefer to prioritise weight reduction and a more open sound can opt for the version without. The choice is made directly on the product page. Every pair of sports exhausts is supplied with standard dB killers included in both silencers. Our exhausts are homologated for road use throughout Europe and Switzerland: the homologation certificate is included and is valid with both dB killers fitted. Removing the dB killers invalidates the product's homologation. For those who want to reduce the sound level further, the No-Noise option is available, with an internally welded filter in both silencers that provides a perceptible reduction in decibels without significantly affecting the exhausts' overall behaviour. The selection is made directly on the product page.
As this involves replacing only the end cans on a fuel-injected bike like the XT 660 X and XT 660 R, no ECU remapping or modifications to the engine management are normally required. The engine management adapts to the new configuration without any particular electronic issues.
Updated production times are visible directly at checkout and may vary depending on the period. Once your order has been dispatched, you will automatically receive a tracking code to follow your parcel.
For any questions about fitting, compatibility or the differences between the available models, check our FAQ section or contact us via the Contact page or chat: we respond directly and without unnecessary delays.
Below you will find the product list available for the Yamaha XT 660 X and XT 660 R. The differences between the various sports exhausts are primarily aesthetic: body shape, material and finish. On each product page you can select the presence or absence of the catalytic converter, the sleeve length (285 mm or 400 mm) and, if desired, the No-Noise option. The chosen configuration applies to both silencers in the pair. Visit the product page to view detailed photos, read the technical specifications and configure your exhausts.
