Introduction

General Information

The model "Aprilia - SR 50 Sport (2002-2003, ZD4RLD)" is a sporty scooter produced by the Italian manufacturer Aprilia between 2002 and 2003.
It belongs to the SR 50 series, known since 1992 for its innovative technology and dynamic design.
The SR 50 Sport was developed to offer riders in the 50cc class a powerful and agile option with a sporty character, suitable for both urban use and dynamic riding.
This model is primarily aimed at riders seeking an agile vehicle with a distinctive appearance that can be ridden in many countries with a moped or AM license.

Model History

The SR 50 series was first introduced in 1992 and quickly established itself as a pioneer in the scooter segment.
The SR 50 Sport (2002-2003, ZD4RLD) belongs to the second generation of this model family, which was launched from 1997 with a revised design and technical improvements.
Compared to earlier models like the SR 50 Replica (1994-1996) or the first liquid-cooled variants from 1994, the "Sport" variant brought an evolution of the sporty approach.
While the SR 50 DiTech model with direct injection was introduced in 1999, the ZD4RLD remained a classic carburetor version with liquid cooling (LC – "Liquid Cooled"), relying on proven two-stroke technology.
In the years 2002 to 2003, Aprilia positioned itself in competition with brands like Yamaha and Piaggio, aiming to reach the target group of younger riders with a mix of performance and sporty style.

Technical Details

Engine and Performance

Technically, the Aprilia SR 50 Sport (2002-2003, ZD4RLD) is powered by a single-cylinder two-stroke engine with a displacement of 49 cc.
The engine is liquid-cooled and equipped with a carburetor, enabling an output of about 4.5 kW (6.1 hp) at 7,000 rpm.
The top speed is limited to about 45 km/h, with derestricted versions capable of reaching higher speeds depending on the approval.
The vehicle features a continuously variable CVT transmission, providing simple and direct power transfer.

Chassis and Brakes

The chassis consists of a hydraulic telescopic fork at the front with 90 mm of travel and a single shock absorber at the rear, giving the scooter solid road handling.
The braking system includes a 190 mm diameter disc brake at the front and a 110 mm drum brake at the rear, providing reliable braking performance for this class.
With a dry weight of about 95 kg and a wheelbase of 1,275 mm, the SR 50 Sport offers high maneuverability.
The tires, sized 130/60-13 at the front and rear, emphasize the sporty claim and ensure sufficient grip.

Design and Variants

Color Variants

The Aprilia SR 50 Sport (2002-2003, ZD4RLD) was available in several color variants, which could vary depending on the market.
Common paint finishes include "Rosso" (Red), "Nero" (Black), and "Grigio" (Gray), often combined with sporty graphics that emphasized the dynamic character of the model.
There are no clear indications that official special models were produced for this specific production period.
While the SR series in other years produced variants like the "Racing" or later the "R-Factory," the focus for the SR 50 Sport from 2002 to 2003 was on a standard production with a sporty orientation.
Individual customizations by dealers might have occurred.