Aprilia Tuono 125 2003 — Specifications

When Aprilia decides to innovate with the new, the result is worthy of attention. The recipe for the high-displacement Tuono, which consisted of stripping the RSV’s fairings to create a nervous and immediately desirable roadster, worked so well that Noale applied the same treatment to its 125. The result is this Aprilia Tuono 125, a two-stroke with a racer’s temperament converted into an aggressive urban machine.

Visually, the break with the RS 125 is clear. The fairing panels have disappeared in favor of an engine guard and radiator scoops, and the forced air intakes have been redesigned to return to a double configuration, as on the older RS models. The perimeter aluminum frame and swingarm receive a matte black finish that contrasts sharply with the gold-colored rims borrowed from the RS SBK model. It’s assertive, it’s consistent, and it gives a graphic personality that few 125s of the time could claim. The high handlebar on risers radically changes the ergonomics compared to the RS: you go from a semi-reclined position to a straight posture, which facilitates maneuvers in the city and releases additional agility that stunt enthusiasts will appreciate. The standard protection sliders are a practical detail that says a lot about the target audience: young A1 license holders who won’t always ride in perfect conditions.

Under the skin, nothing changes compared to the RS 125. It’s the same 124.82 cc two-stroke single-cylinder engine, with a 54 mm bore and 54.5 mm stroke and a compression ratio of 12.5:1. The power, restricted to 29.2 horsepower at 11,000 rpm, delivers its sensations only if you stay within the correct rev range, beyond 8,000 rpm. Below that, the engine becomes soft, uncommunicative, almost boring. That’s the very nature of a two-stroke: either you play the game, or you get bored. The torque of 18.7 Nm falls at 10,000 rpm, which imposes a riding discipline that beginners will have to learn quickly. With a wet weight of 139 kg and a seat height of 805 mm, the machine remains physically accessible, and the announced top speed of 145 km/h places the Aprilia Tuono 125 top speed in the upper segment for a 125 of the time.

The cycle section reprises the elements of the RS without modification: 40 mm inverted fork with 120 mm of travel, rear mono-shock absorber, front brake with a 320 mm disc pinched by a 4-piston caliper, and 220 mm at the rear with 2 pistons. Equipment found on much more expensive machines, and which explains in part the price of 4,569 euros, clearly positioned above the Derbi, MBK and other Peugeot that populated garages of the time. In terms of tires, the 110/70-17 front and 150/60-17 rear offer a generous footprint for a 125.

The Aprilia Tuono 125 reviews circulating since its release all converge on the same observation: it’s a motorcycle for young riders who want to progress quickly, who accept to work on their technique of gear changes on a 6-speed gearbox, and who find in this fighter-style naked aesthetic a credible alternative to the faired replicas. On the used market, the Aprilia Tuono 125 remains a sought-after value precisely because it hasn’t aged in its concept. The unrestricted versions, a recurring topic on forums around the Aprilia Tuono debridage, reveal a two-stroke engine capable of much more than what regulations allowed. For a rider looking for a serious entry into the A1 category, it’s a coherent, demanding, and frankly more exciting proposition than the average.