The super naked with the X factor: limited edition, track-only Tuono V4 X is lightest and most powerful yet

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This ultra-trick, track-only version of Aprilia’s Tuono V4 has just been unveiled and is claimed to be the lightest and most powerful production super naked ever.

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Called the Tuono V4 X, it’s being built by Aprilia Racing, bristles with the latest in track technology (including MotoGP-style wings) and is a follow-up to the success of the Italian firm’s ultra-exclusive RSV4 X track-only superbike last year.

Aprilia say the main focus in creating the bike was cutting weight – it tips the scales at 166kg dry. To achieve that, all bodywork parts, including the new aerodynamic wing, which is designed to increase stability at high speed, are carbon fibre.

The fuel tank, which replicates the shape of the original, is also lighter, the electrical system is simplified while parts such as the clutch lever, fuel cap and pegs are all billet aluminium. The bike also loses heavy road components such as lights and sidestand.

Aprilia Tuono V4 X Aleix Espargaro

At the same time the X’s power has also been significantly boosted over that of the 173bhp Tuono V4 1100 Factory production roadster. The X actually uses the high compression, 214bhp engine from the latest RSV4 1100 Factory superbike boosted to 221bhp by having a titanium/carbon track-only Akrapovic exhaust with the engine remapped to suit.

Aprilia’s universally praised electronic rider aids, namely engine braking, traction control and anti-wheelie, have also been revised and the Tuono X also comes with an up/down quickshifter, specially-reprogrammed TFT race dash that shows lap times via a built-in GPS sensor while its lightweight forged Marchesini wheels comes with racing slicks fitted as standard.

Aprilia are attempting to repeat the success of the RSV4 X, which sold out in hours despite costing €39,900 (£34,233). The Tuono X is slightly cheaper at €34,900 (£30,790) and is available now. Each buyer will get a tour of the racing department at Aprilia’s Noale factory as well as a KYT NX-Race helmet with a graphic inspired by the bike's colour scheme.

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Phil West

By Phil West

MCN Contributor and bike tester.