The QUASAR engine was introduced in 2003 as a water-cooled 4-valve four-stroke engine with a displacement of 244 cm³. It is based on the LEADER engine, which it should expand and, in the medium term, replace with larger displacement, and in addition to more displacement, it also has a newly designed interior with an internal starter motor, a more compact flywheel, a larger oil supply, etc. The first engines are designed with a carburettor correspond to the Euro 2 standard. From 2005 it will be built with petrol injection and a regulated catalytic converter and thus complies with the Euro 3 standard . Since 2008/2009 a version with 124 cm³ and 278 cm³ displacement has also been offered. Quasar engines are used in the Piaggio X10 , the Piaggio MP3 , the Vespa GTS and many other vehicles.
|construction time||since 2009||2003-2005||2003-2010||since 2008|
|Displacement||124 cc||244 cc||244 cc||278 cc|
|Bore × stroke (mm)||57.0 x 48.6||72.0 x 60.0||72.0 x 60.0||75.0 x 63.0|
|Compression ratio||11.5-12.5: 1||11.5-12.5: 1|
a Die Werte entstammen den Handbüchern und der Webseite der Piaggio Engine Division
|Differentiation according to the ECU (injection control unit)|
|Type||G1 ECU||G2 ECU||G3 ECU|
|construction time||2005-2006||2006–2012||from 2012|
|Pins||26 pins||26 pins||34 pins|
For the gearbox, the reduction gearbox of the Leader motor that is installed in the long swing arms was used because it is larger and more stable.
|Rear wheel||primary||secondary||total a )||Models (selection)|
|130 / 70-12||14/50||16/51||11.38||Vespa GTS 125 i. e. great|
|130 / 70-12||14/50||21/46||7.82||Vespa GTS 250|
|130 / 70-12||14/50||21/45||7.65||Vespa GTS 300|
|15 inches||Rambla 125 b )|
|16 inches||14/50||14/53||13.52||Beverly 125, Carnaby 125 b )|
|15/49||Polini primary (202.1413)|
|17/49||Malossi secondary short (6712194)|
|22/45||Malossi secondary long (6714844)|
|14/50||17/49||10.29||original + Malossi (6712194)|
|14/50||22/45||7.31||original + Malossi (6714844)|
|15/49||16/51||10.4||GTS 125 + Polini (202.1413)|
|15/49||21/45||7.00||GTS 300 + Polini (202.1413)|
|15/49||17/49||9.42||Polini + Malossi in short|
|15/49||22/45||6.68||Polini + Malossi long|
a) One turn on the rear wheel corresponds to 11.38 turns on the clutch, which is calculated with 50/14 * 51/16 = 11.38.
b) Some of these vehicles have a Leader engine, but have the "large" gearbox that is used in the Quasar.