APRILIA RS4 50 (2010-2011) Specs, Performance & Photos

In 2010, the Italian motorcycle maker released the Aprilia RS4 50, a small-displacement sports replica created by Italian engineers for the youngest Aprilia fans. The RS4 125 was the first sports bike with a four-stroke engine for 16-year-old riders.

Visually, the motorcycle packed standard features, such as a full fairing, a three-headlight system, a small windscreen, a two-piece dual seat, a single exhaust system, a dual-sided swingarm, and Y-shaped multi-spoke wheels.

The small bike was built around an aluminum frame with a 41 mm inverted telescopic fork on the front that provided 110 mm of travel and an asymmetric swingarm with a single shock absorber on the rear that offered 122 mm of travel.

As for the braking performance, the bike's wheels were fitted with a 300 mm stainless steel brake disc on the front and a 218 mm stainless steel disc on the rear. The front was coupled to a four-piston radial caliper, and the rear was tied to a single-piston caliper, offering excellent stopping power.

In the performance department, the 2010 Aprilia RS4 50 had its soul brought to life by a 49cc two-stroke liquid-cooled single-cylinder engine managed by a carburetor. The engine was married to a six-speed manual transmission that sent the power to the rear wheel through a final chain drive, launching the motorcycle to a top speed of 97 kph (60 mph).