The Aprilia SX50 is a street

motorcycle A motorcycle (motorbike, bike; uni (if one-wheeled); trike (if three-wheeled); quad (if four-wheeled)) is a lightweight private 1-to-2 passenger personal motor vehicle Steering, steered by a Motorcycle handlebar, handlebar from a saddle-style ...

sold by

Aprilia Aprilia is an Italian motorcycle and Scooter (motorcycle), scooter manufacturer in Noale, Italy, founded by Alberto Beggio. History Early days Aprilia, named after the Pre-war automobile, pre-war Lancia Aprilia, was founded after the Seco ...

since 2006. It is powered by a D50B0 single-cylinder

two-stroke engine A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a Thermodynamic power cycle, power cycle with two strokes of the piston, one up and one down, in one revolution of the crankshaft in contrast to a f ...

with a nikasil-lined cast-iron cylinder manufactured by

Derbi Derbi is a manufacturer of motorcycles, scooters, mopeds and recreational all-terrain vehicles produced by Nacional Motor S.A.U., currently integrated into the Italian (2009) Piaggio Group. History Derbi's origins began with a little bicycle wo ...

Engine

The Aprilia SX 50 engine is sourced from Derbi/Piaggio. This engine was used in the Derbi Senda DRD/X-Race/X-Treme supermotos, as well as the Derbi GPR 50 and Aprilia RS 50 road bikes. Engine parts from the bikes supermoto can be directly swapped with one another, there are some small differences between the road bike and supermoto engine which ceases the transfer of some external engine parts (exhaust, airbox).

References

* SX 50 Two-stroke motorcycles Motorcycles introduced in 2006 {{motorcycle-stub