Aprilia RS 125 2002 — Specifications

Arnaud Vincent had secured his world title on a machine like this. That’s what you notice when you first lay eyes on the Aprilia RS 125 2t: this isn’t a showroom replica, it’s a genuine statement of intent.

In 2002, Aprilia was not pretending. The perimeter aluminum frame, the 40 mm inverted fork, the variable section swingarm, the lightweight wheels: everything here is designed for the track, not for highway traffic jams. The Aprilia RS 125 engine, a 124.80 cc two-stroke single cylinder with a near-square bore of 54 x 54.5 mm and a compression ratio of 12.5:1, develops 29.9 horsepower at 11,250 rpm in its restricted version. That may seem little on paper. In practice, on a dry weight of 114 kilograms and a fully fueled weight of 139 kilograms, the power-to-weight ratio places the machine in a category of its own. The torque of 20 Nm arrives at 10,000 rpm, which requires precise management of the 6-speed gearbox: you must keep the engine in its power band, otherwise it will bog down and struggle.

De-restriction is a topic that owners of used Aprilia RS 125s know well. In full power version, estimates hover around 34 horsepower, a power density per liter that defies comprehension for a machine in this category. Let us recall that this is outside the legal framework and that the responsibility belongs entirely to the rider. But this explains why the RS 125 2t built its reputation far beyond its segment and why it is still talked about today, from the 1998, 1999, 2000 versions to the subsequent generations.

Facing the Cagiva Mito, another serious contender for the title of best small-displacement sportbike, Aprilia plays the card of direct lineage with GP racing. The Aprilia RS 125 fairing adopts the aesthetic codes of the competition RS 250, and you cannot fault that choice: the whole is consistent, aggressive without being garish. The 110/70-17 tires at the front and 150/60-17 at the rear, the suspension with 120 mm of travel on both sides, the single discs at both wheels: everything is sized for track use. The maximum speed approaches 160 km/h, which in the de-restricted version can still improve depending on conditions.

With a catalog price of 5,189 euros at the time, the Aprilia RS 125 price was justified for those seeking a track bike, not a versatile machine. Today on the used Aprilia RS 125 2t market, Aprilia RS 125 parts and Aprilia RS 125 graphics kits remain accessible, which maintains a community of loyal enthusiasts. It is not a machine for beginners or urban riders seeking utility. It is a rider's bike, demanding, rewarding those who accept to work for it. The seat height of 805 mm and the 14-liter tank further confirm that it is designed for adult builds and short, intense outings. Its natural habitat remains the track.