Introduction

The model "Aprilia - SR 50 Di-Tech Sport (2001-2002, ZD4RLB)" is a sporty scooter produced by the Italian manufacturer Aprilia between 2001 and 2002. It belongs to the SR 50 series, known since its introduction in 1992 for its innovative technology and dynamic design.
The SR 50 Di-Tech Sport was developed to offer riders in the 50cc class a powerful option with advanced technology, particularly through the introduction of direct injection. This model targets riders seeking an agile and sporty vehicle that can be ridden in many countries with a moped or AM license.

History of the SR 50 Series

The SR 50 series debuted in 1992 and quickly established itself as a pioneer in the sporty scooter segment. The SR 50 Di-Tech Sport (2001-2002, ZD4RLB) is part of the second generation of this model family, which experienced a significant advancement with the introduction of Di-Tech technology (Direct Injection Technology) in 1999.
This technology, developed in collaboration with Orbital, brought direct injection to the 50cc class and improved performance and fuel efficiency. The ZD4RLB as the "Sport" variant was positioned as a special edition of the Di-Tech series, focusing on sporty design and optimized components. During this phase, Aprilia successfully competed with brands like Yamaha and Piaggio, solidifying its reputation as an innovator in the scooter market.

Technical Specifications

Technically, the Aprilia SR 50 Di-Tech Sport (2001-2002, ZD4RLB) is powered by a single-cylinder two-stroke engine with a displacement of 49cc. The engine is liquid-cooled and uses a direct injection system, where the fuel is injected directly into the combustion chamber, allowing for more efficient combustion.
The power output is about 4 kW (5.4 hp) at 6,500 rpm, and the top speed is limited to about 45 km/h, with derestricted versions capable of reaching higher speeds depending on the approval. The vehicle is equipped with a continuously variable transmission (CVT), ensuring easy operation and smooth power delivery.

Chassis and Brakes

The chassis consists of a hydraulic telescopic fork at the front and a single shock absorber at the rear, giving the scooter a sporty road stance. The braking system includes a 190 mm diameter disc brake at the front and a 110 mm drum brake at the rear, providing solid braking performance for the class.
With a dry weight of about 95 kg and a wheelbase of 1,275 mm, the SR 50 Di-Tech Sport is light and agile. The tires, sized 130/60-13 at the front and rear, emphasize the sporty character and ensure good grip.

Design and Variants

The Aprilia SR 50 Di-Tech Sport (2001-2002, ZD4RLB) 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 model's dynamic look.
As the "Sport" version, this model was already a special variant of the Di-Tech series, focusing on a more aggressive design and possibly slight technical adjustments compared to the standard Di-Tech version. However, there are no clear indications of further limited special models within these production years. The production focused on the standard Sport version, with regional dealers possibly making individual adjustments.