Introduction

Aprilia - Leonardo 125 ST (2002, ZD4MB06)

The Aprilia Leonardo 125 ST (model variant ZD4MB06) is the “Sport‑Touring” version of the Leonardo 125 from 2002. It merges everyday usability with touring features like enhanced fairing, comfort upgrades, and a refined ergonomics package — ideal for riders who frequently ride beyond city limits.
With the ST edition, Aprilia introduced targeted modifications to make the Leonardo more versatile and robust without sacrificing its urban competence.

Model History

The Leonardo ST debuted in 2002 and brought aesthetic and functional enhancements over previous versions.
Changes included a taller windscreen, a broader lower leg shield, and a re‑designed seat with lower ride height to aid riders of smaller stature.
Those adjustments were aimed at increasing comfort and practicality, especially for longer rides extending beyond the city area.

Technical Details

The Leonardo 125 ST is powered by a **liquid‑cooled single‑cylinder four‑stroke engine** with a displacement of 124 cc.
The power output is about **12 hp (≈ 9 kW)** at ~9 000 rpm.
Peak torque is approximately **10 Nm** at ~7 000 rpm.
Power is delivered via a **CVT automatic transmission**.
Top speed is estimated at **105 km/h**.

Chassis and Brakes

The chassis is built on a sturdy tubular steel frame, shared with other Leonardo variants.
Suspension is handled by a telescopic front fork and dual-shock swingarm in the rear.
Braking duties are managed by a **220 mm front disc** and a **190 mm rear disc**.
Tyres are sized **120/70‑12 front** and **140/70‑12 rear**.

Colour Variants

The Leonardo 125 ST was available in classic colours such as black, silver, blue, or white depending on the market.
Graphic themes and decal styles varied slightly across years and regions.
Many owners upgraded their ST with accessories like top cases, taller windshields or more comfortable seats to enhance its touring capability.