The SX 50 supermotard is a high performance 50 cc machine, powered by an engine of the latest generation and featuring the sort of chassis that many big bikes can only envy.
The SX is at at home on tough racing circuits as it is on the daily trip from home to school or college. The design speaks for itself. Sharp, clear-cut lines derive directly from the RXV/SXV off-road style icons.
The new perimeter frame forms a direct connection between the steering head and the swingarm pivot, in line with the latest off-road developments. The frame is made from high strength steel to absorb all the stress that hard off-road riding can transmit. This synthesis of strength and lightness is the perfect match for the characteristics of the SX 50. The suspension is another one of the strong points. At the front there is a mighty fork with 40 mm stanchions giving a wheel travel of 195 mm, more than enough to absorb even the hardest knocks. At the back, the high strength steel swingarm is damped by an advanced hydraulic monoshock giving a generous 180mm of rear wheel travel to ensure that the SX50 can tackle even the toughest terrains.
The imposing front brake is abundantly over-sized to ensure safe, competition standard braking and stopping. The ventilated steel disc is an amazing 300 mm in diameter on the SX motard, bigger than on any alternative 50cc bike. The floating front caliper is a twin piston unit. The rear brakes are up to the job too, with a 180mm stainless steel disc and a powerful caliper with two opposing pistons.
The wheels are another essential part of any competition machine, and one of the most distinctive elements on these small off-road Aprilias. Aluminium has been adopted for its light weight and exceptional stress resistance. The SX is fitted with two 17” wheels with wide profile tyres for superb handling around town or on a twisting cart track.
Such an amazing chassis obviously demands an engine to match. That is why the SX is powered by Aprilia’s advanced liquid cooled, single cylinder two stroke engine with reed valve induction. Use of the latest technology ensures that this new engine delivers exceptional performance from a surprisingly low weight (only 15 kg). Lubrication is provided by a separate mixing system, with a variable displacement volumetric pump. A kick start has been preferred to save weight. A six speed gearbox makes the best possible use of the power delivered by this impressive engine.
On top of all this the SX also benefits from the sort of prestige components normally found only on far bigger bikes. The ultra-compact digital instruments feature an innovative design and perform a range of functions to keep all parameters under constant control. Twin headlights add another touch of personality and guarantee superior night-time visibility.
The long seat extends over the compact fuel tank to provide ample room for movement under sport riding conditions. Tank capacity is 7 litres. Considering the extremely limited fuel consumption of the 50 cc engine, the Aprilia SX 50 therefore has plenty of autonomy for all types of use.
Just like all Aprilia motorcycles, the SX also respects nature: the exhaust is fitted with a catalytic converter, and emissions respect euro 2 standards without penalising the advanced performance of the Aprilia 50 cc engine.