Introduction

Aprilia - RS 125 (2021, ZD4XAA00)

The Aprilia RS 125 (type ZD4XAA00) from 2021 is a modern lightweight supersport motorcycle that continues Aprilia’s tradition in the 125cc performance segment. It combines race-inspired styling with practical technology, aimed at riders who want both dynamic performance and everyday usability.
With upgraded electronics, ABS, and high-end components, the 2021 RS 125 is a strong contender in the 125cc class – ideal for entry-level riders with ambitious expectations.

Model History

The "RS 125" badge has a long tradition at Aprilia and represents compact supersport machines with true racing DNA. The 2021 version continues this legacy with updated equipment and Euro 5-compliant performance.
Aprilia regularly updates the RS 125 with enhancements in electronics and chassis to keep it at the top of the lightweight sportbike category.
The chassis code "ZD4XAA00" refers to specific homologation and equipment configurations for the European market.

Technical Specifications

The RS 125 is powered by a liquid-cooled, single-cylinder, four-stroke engine with 124.8 cc displacement, optimized for efficiency and torque delivery.
It produces up to **11 kW (15 hp)**, which is the legal limit for the A1 license class in Europe.
Power is transferred via a 6-speed gearbox and final chain drive.
Both electric and manual kick start options are available for reliability.
Fuel consumption is around **2.6 l/100 km** (WMTC), with CO₂ emissions at approx. **60 g/km**.

Chassis and Equipment

The frame is a double-beam aluminium design focused on agile, responsive handling.
Up front, the bike features a 40 mm upside-down telescopic fork, while the rear is equipped with a mono-shock system.
Braking is handled by a 300 mm front disc with radial caliper and ABS, and a 218 mm rear disc with ABS as well.
Tyres: 100/80‑17 front and 140/70‑17 rear – offering great stability and cornering grip.
The seat height is 820 mm, and wet weight is approx. 144 kg with a 14.5-litre fuel tank.
Overall dimensions: length ~1,968 mm, width 760 mm, height 1,135 mm, and wheelbase 1,350 mm.

Design and Features

The 2021 RS 125 showcases sharp supersport bodywork, a compact fairing with aerodynamic lines, and triple LED headlights.
The dashboard includes a digital instrument cluster, USB port (on some variants), and optional Aprilia MIA connectivity system.
ABS with anti-lift (stoppie control), modern fuel injection, and advanced intake and exhaust tuning deliver both safety and performance.
Colour options typically include classic racing liveries and stealthy matte finishes – Aprilia rotates special editions regularly.

Conclusion

The Aprilia RS 125 (2021, ZD4XAA00) is an excellent entry into the world of sportbikes. With its striking looks, high-end chassis components, and modern safety tech, it stands out as a premium 125cc model. Perfect for riders looking to combine road use with real track-ready DNA.