Introduction

Aprilia - RX 50 (2003–2004, ZD4STA01)

The Aprilia RX 50 with type code ZD4STA01 belongs to the second generation of the popular RX series. It was completely redesigned for the 2003 model year and featured a modern look with clear off-road ambitions. As a 50 cc enduro bike for young riders with AM licenses or moped permits, it combined sporty looks with everyday practicality.

Model history

From 2003 onwards, Aprilia introduced a new platform for the RX 50 with a more prominent plastic fairing kit and redesigned headlight. Compared to the previous generation, the frame geometry was improved and the ergonomics were refined with a narrower tank and new seat. The air-cooled two-stroke engine was sold limited to 45–50 km/h in most markets, but unrestricted versions were also available.

Technical details

Air-cooled single-cylinder two-stroke engine with 49 cc displacement. Power in unrestricted version: approx. 7.0 hp at around 9,000 rpm. 6-speed manual gearbox with chain drive. CDI ignition, oil injection or premix depending on version. Top speed unrestricted: ~75 km/h.

Chassis and brakes

Steel frame with bolt-on subframe. Front suspension via upside-down telescopic fork. Rear: monoshock on aluminium swingarm. Tires: 21" front, 18" rear with knobby tread. Front brake: 260 mm disc, rear: 180 mm disc.

Colour variants

The RX 50 during this period was usually delivered in sporty colour combinations such as black/red, blue/silver or yellow/black. Sticker kits and graphics varied by market. Accessories like hand guards, larger sprockets or performance exhausts were popular tuning options.