Introduction

General Information

The model "Aprilia - SR 50 (LC, 1997-2000, ZD4MZ)" is a sporty scooter produced by the Italian manufacturer Aprilia between 1997 and 2000.
It belongs to the SR 50 series, known since 1992 for its dynamic appearance and advanced technology.
The SR 50 was developed to appeal primarily to younger riders looking for a powerful and agile vehicle in the 50cc class, which can be ridden in many countries with a moped or AM license.
The abbreviation "LC" stands for "Liquid Cooled" and highlights the engine's liquid cooling, which ensures better performance and reliability.

Development and Design

The SR 50 series was introduced in 1992 and marked a turning point in the sporty scooter segment.
The ZD4MZ, produced from 1997 to 2000, belongs to the second generation of this model family, which was revised from 1997 onwards.
This phase brought a more aggressive design and technical advancements compared to the original series.
Aprilia had already made an innovation leap in 1994 with the introduction of liquid cooling in some SR 50 models, and the ZD4MZ continues this line.
With this model, Aprilia solidified its reputation as a leading manufacturer in the scooter market and positioned itself in competition with brands like Yamaha and Piaggio.
The production period from 1997 to 2000 falls into an era when sporty 50cc scooters were increasingly gaining popularity in Europe.

Technical Details

Engine and Performance

Technically, the Aprilia SR 50 (LC, 1997-2000, ZD4MZ) is powered by a single-cylinder two-stroke engine with a displacement of 49cc.
The engine is liquid-cooled and fueled by a carburetor, enabling a power output of about 4 kW (5.4 hp) at 6,500 rpm.
The top speed is limited to about 45 km/h, with derestricted versions capable of reaching higher speeds depending on 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, providing the scooter with stable road handling.
The braking system includes a 190 mm diameter disc brake at the front and a 110 mm drum brake at the rear, which offered solid braking performance for this class at the time.
With a dry weight of about 92 kg and a wheelbase of 1,275 mm, the SR 50 offers high maneuverability.
The tires, sized 130/60-13 at both front and rear, provide good grip and emphasize the sporty character of the scooter.

Design and Variants

Color Variants and Special Models

The Aprilia SR 50 (LC, 1997-2000, ZD4MZ) was available in various color variants, which could vary depending on the market.
Common paint finishes include "Rosso" (Red), "Nero" (Black), and "Grigio" (Gray), which emphasized the dynamic and aggressive look of the scooter.
There are indications that Aprilia offered special models or designs for the SR 50 series in certain years, such as with racing graphics or special color combinations.
However, no specific special models are clearly documented for the ZD4MZ itself.
The focus was on standardized production, with individual customizations possible by dealers or regional markets, which do not necessarily count as official special models.