Introduction

Aprilia - RX 50 (2003, ZD4TT0)

The Aprilia RX 50 with type code ZD4TT0 was introduced in 2003 as a classic entry-level enduro. It was part of the updated RX series, specifically tailored to young riders and beginners. The focus was on rugged engineering, sporty looks, and easy maintenance – ideal for dirt roads or getting started in off-road riding. This model differed slightly from other RX versions through specific features and design elements.

Model History

The RX 50 (ZD4TT0) was launched in 2003 as part of Aprilia's revised 50cc enduro line-up. Compared to earlier models, it had a more angular design, improved ergonomics, and styling closer to full-size enduro bikes. Depending on the market and version, it came with different exhaust systems, forks, or rim colours. It was also used as a platform for riding schools or light off-road modifications.

Technical Details

Air-cooled single-cylinder 2-stroke engine with carburettor, 49 cc. Power in unrestricted version: approx. 7.0 hp at 9,000 rpm. 6-speed manual transmission with chain drive. CDI ignition, lubrication via premix or separate oil system depending on the version. Top speed derestricted: ~75 km/h. Fuel tank capacity: approx. 7 litres including reserve.

Chassis and Brakes

Tubular steel frame with bolt-on rear subframe. Conventional telescopic fork at the front. Rear: mono shock absorber with linkage and aluminium swingarm. Wheels: 21" front, 18" rear with knobby enduro tyres. Brakes: 260 mm disc at the front and 180 mm disc at the rear. Some variants featured steel braided brake lines as standard.

Colour Variants

The RX 50 (ZD4TT0) was available in sporty colour combinations – often red/black, blue/silver, or yellow/black with bold graphics. Details like rim colour, decals or fenders varied by market. Common accessories included handguards, sport exhausts or smaller sprockets.