The Aprilia SR50 is a scooter built by

Aprilia Aprilia is an Italian motorcycle manufacturer founded immediately after World War II in Noale, Italy, by Alberto Beggio. The company started as a manufacturer of bicycles and moved on to manufacture scooters and small-capacity motorcycles. ...

History

Introduced in 1992, more than 800,000 units have been sold, bucking the trend for less use of

two-stroke engines A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes (up and down movements) of the piston during one power cycle, this power cycle being completed in one revolution of ...

. Aprilia claims several firsts for the SR50 in the scooter market, including 13 inch wheels, liquid cooling, double disc braking, and a direct injection engine. The performance-oriented suspension, tires, and engine are consistent with its styling. Colours and graphics vary by country. The digital instrument panel gives readings for speed, clock, odometer, trip counter, fuel level, coolant temperature and battery voltage. The SR50 has used a variety of engines, sourced from

Morini The Morini (Gaulish: "sea folk, sailors") were a Belgic coastal tribe dwelling in the modern Pas de Calais region, around present-day Boulogne-sur-Mer, during the Iron Age and the Roman period. Name They are mentioned as ''Morini'' by Caesar ( ...

, Piaggio and

Minarelli Minarelli is an Italian motorcycle engine manufacturer. It is part of the Fantic Motor group. History Minarelli was founded in Bologna in 1951 as a motorcycle manufacturer. In 1954 it also began to build mopeds. Two years later Minarelli swi ...

. It conforms to EURO 3 emission standards. The DiTech model used an injection engine, with technology from Orbital. The current model uses a

Dell'Orto Dell'Orto is an Italian company, headquartered in Cabiate, specialized in the construction of carburetors and electronic injection systems. The company was founded in 1933 as "Società anonima Gaetano Dell'Orto e figli" (Gaetano Dell’Orto and ...

waterbottle. The powerful engines allow reaching very high speeds for a scooter, the SR50 can reach 90 km/h in its standard configuration after being derestricted.

DITECH two-stroke engine

The SR50 DITECH uses the Synerject gasoline direct injection (GDI) system developed jointly by the

Orbital Corporation Orbital Corporation Limited (), formerly Orbital Engine Corporation Limited pioneered by Ralph Sarich, is an Australian company based in Balcatta, Western Australia, that aims to provide clean engine technologies and alternative fuel systems ...

and

Siemens Siemens AG ( ) is a German multinational conglomerate corporation and the largest industrial manufacturing company in Europe headquartered in Munich with branch offices abroad. The principal divisions of the corporation are ''Industry'', '' ...

AG. The system uses a crank-driven air compressor to deliver air to the cylinder head at a pressure of , thereby avoiding the use of carburation; the cylinder walls are not wet with gasoline, only with lubricating oil. After the port is closed and the air is compressed by the piston, gasoline is injected by an atomizer like a spray nozzle mixed with and propelled by the highly compressed air, into the main combustion chamber where, after the injection port closes, and the piston is still rising, it is ignited in the compressed main charge of air. The use of direct injection and stratified charge allows the DITECH engine to meet Euro 2 standards. 2007 Aprilia SR50R Scooters

References

External links

Official Website

aprilia.com

apriliaforum.com
{{Aprilia motorcycles Motor scooters SR50 Motorcycles introduced in 1992