Introduction

Offroad-Inspired Lightweight Supermoto

The model "Aprilia – SX 125 (2018–2020, ZD4KXB00)" is a sporty 125 cc lightweight motorcycle in supermoto style, specifically designed for young A1 license riders.
It combines aggressive design with modern technology and targets riders looking for an agile bike for both road and light off-road use.
With its robust build, high-quality components and offroad DNA, the SX 125 delivers a true racing feel for everyday riding.

Model History

Evolution Based on the Derbi/Aprilia Platform

The Aprilia SX 125 (ZD4KXB00) is based on the long-established Derbi/Aprilia platform, previously successful with models like the Derbi Senda and RX 125.
Between 2018 and 2020, the SX received continuous updates, including compliance with EURO 4 standards, visual upgrades and a modern digital dashboard.
The SX 125 is among the most popular entry-level supermoto bikes and offers a balanced mix of performance, safety and styling.
It competed with models such as the Yamaha WR 125X or KTM Duke 125 – but stood out with a particularly sporty value-for-money ratio.

Technical Details

Engine and Transmission

The Aprilia SX 125 is powered by a **liquid-cooled single-cylinder four-stroke engine with 124.2 cc displacement**.
The DOHC engine delivers **11 kW (15 hp)** at around 10,000 rpm – the maximum allowed for A1 license holders.
Fuel is supplied via **electronic injection**, ensuring smooth engine performance and precise throttle response.
The 6-speed gearbox supports sporty riding and accurate gear shifts. The engine meets **EURO 4 emission standards**.

Chassis and Brakes

The SX 125 features a strong steel perimeter frame and a quality suspension setup with **41 mm upside-down fork** and a directly linked rear monoshock.
The braking system includes a **260 mm front wave disc brake with dual-piston caliper** and a **220 mm rear disc** – with **ABS** standard on the front wheel.
Tires: front **100/80‑17**, rear **130/70‑17**, mounted on lightweight 17-inch cast wheels.
Dry weight approx. 134 kg, seat height approx. 880 mm – ideal for taller or sportier riders.
Fuel tank capacity: 6.2 litres, consumption: approx. 2.7 l/100 km, top speed: around 110 km/h.

Design and Variants

Supermoto Styling for Street and Gravel

The Aprilia SX 125 stands out with its sharp lines, high front fender, enduro handlebars and sporty graphics.
A LED taillight, halogen headlight and fully digital display are part of the equipment, as well as stylish colour options in red, black or white.
The SX was offered in various colour and graphic versions, including special racing-themed editions.
Optional accessories such as handguards or engine skid plates allow individual customisation.
The SX 125 is ideal for young riders seeking a bold, agile bike for urban and rural adventures.