Introduction

Aprilia - RX 125 (2021–2022, ZD4KTA00)

The Aprilia RX 125 with type code ZD4KTA00 is an updated version of the well-known RX series, produced in 2021 and 2022. It complies with the Euro 5 emission standard and combines proven off-road technology with a sporty modern look. Thanks to its agile handling and rugged features, the RX 125 is aimed particularly at A1 licence holders with both on-road and off-road ambitions.

Model History

With the ZD4KTA00, Aprilia transitioned the RX 125 into the Euro 5 era. The model update included revised engine electronics, new graphics and detail improvements to chassis and ergonomics. The RX retained its off-road character – with long-travel suspension, large wheels and ABS system. This version remained in production through model year 2022 before being replaced by newer generations.

Technical Details

The RX 125 features a liquid-cooled 124.2 cc four-stroke single-cylinder engine. Maximum power: 15 hp (11 kW) at 10,000 rpm – A1 compliant. Maximum torque: 11.2 Nm at 8,000 rpm. Power is transmitted via a 6-speed manual gearbox with chain final drive. Top speed is around 110 km/h, depending on rider and terrain.

Chassis and Brakes

The chassis uses a double-cradle steel frame. At the front, an upside-down fork with 240 mm travel; rear: monoshock with 210 mm. Brakes: 260 mm wave disc at the front, 220 mm wave disc at the rear. Modern Bosch ABS with switchable rear function comes standard. Tyres: 90/90‑21 front, 120/80‑18 rear – classic enduro dimensions.

Colour Variants

The RX 125 ZD4KTA00 was offered in eye-catching designs like black/red or grey/neon. Market-specific variations in graphics and trim were common. Accessories such as handguards, engine protection, enduro mirrors or luggage racks were frequently added.