The bike won ten World Championship (one rebranded as Derbi and one as Gilera).

Since 2007, the bike is available in a new version, called RSA 125, for some riders.

The RSA has many new details than the previous model, including improvements in the intake system and the engine.

The old version, with some updates from the RSA, is still used as a customer bike and it is called the RS 125 LE.

The RSA (and the "evolution" version of the RS 125) are used not only by Aprilia, but also by Gilera and Derbi (rebranded as such), since all three brands belong to the Piaggio group.