Introduction

The model "Aprilia - SR 50 (2004–2009, ZD4VFE)" is a sporty scooter produced by the Italian manufacturer Aprilia between 2004 and 2009. This version belongs to the third generation of the SR 50 series and marks the transition to modern fuel injection systems and a thoroughly revised design.
With this model, Aprilia targeted riders who want to combine sporty looks with reliable technology and everyday usability. The scooter particularly appeals to young, urban users looking for a powerful 50 cc vehicle that can be ridden with an AM-class license or equivalent national categories.

Model History

The SR 50 series was introduced in 1992 and quickly became an icon in the sporty 50 cc scooter segment. The ZD4VFE model represents a major evolutionary step, as it came equipped with electronic direct fuel injection (DiTech) from the factory.
This technology enabled lower fuel consumption, better emissions values, and more precise engine control. Aprilia set new standards in terms of environmental friendliness and efficiency – particularly important in urban traffic.
The design of the VFE series was significantly modernized compared to its predecessors: sharp lines, integrated indicators, and more aggressive bodywork defined its appearance. The ZD4VFE thus marked the transition to a new generation of powerful, low-emission scooters.

Technical Details

Engine and Performance

The Aprilia SR 50 (ZD4VFE) is powered by a liquid-cooled single-cylinder two-stroke engine with a displacement of 49 cc. The core feature is the DiTech system (Direct Injection Technology), which enables precise fuel metering and ensures low emissions.
The engine delivers approximately 3.5 kW (4.8 hp) at 6,500 rpm. The top speed is limited by law to around 45 km/h, although derestricted versions can reach significantly higher speeds. The continuously variable CVT transmission ensures smooth power delivery and easy handling in city traffic.

Chassis and Brakes

The chassis is based on a hydraulic telescopic fork at the front and a single rear shock absorber. This setup offers a good balance between sporty riding and everyday comfort.
A 190 mm front disc brake is paired with a 110 mm rear drum brake – a proven configuration in this class. The dry weight is around 90 kg, and the wheelbase measures approximately 1,290 mm. Tires in size 130/60-13 on both axles ensure good grip and stable handling.

Color Options and Special Editions

The SR 50 ZD4VFE was available in various color variants. Common paint schemes included "Rosso Fluo" (fluorescent red), "Nero Lucido" (gloss black), "Bianco Racing" (white), and occasionally limited editions with sporty graphics.
Special versions such as the “Factory” edition or racing replicas were also offered, making the scooter especially popular in the tuning and enthusiast communities.
These editions often differed through paintwork, decals, and occasionally technical components like performance exhausts or alloy wheels. Aprilia remained true to its philosophy of combining sporty engineering with stylish individuality.