New Three Valve Engine

Piaggio have developed a new 3 valve engine to replace the existing two valve “Leader” 125cc & 150cc series.  Like the Leader,  the “3V” is air cooled, is similar in physical size and shape and weighs about 1kg less.  In addition to the three valve cylinder head, (two inlets and one exhaust) the 3V boasts a number of major technical improvements.  The single over head camshaft is supported by anti-friction bearings and the valves are operated via roller type rockers.  The crankshaft is new as well and has been designed, like the valve train to reduce friction losses.  The cylinder bore to stroke ratio is different as is (not surprisingly) the valve timing.  Advancements have also been made to the cooling system, starter and ignition components.

The 3Vs will all be fuel injected and will come fitted with Marelli’s latest integrated ECU / throttle body know as the G3.  Advanced software design including a new approach to three dimensional fuel and ignition mapping are features of this system.

Performance increases of up to 10% are claimed while fuel consumption is reduced by as much as 30%.  Exhaust emission levels are also improved.

The new engine was developed at the Pontedera design facility and will be produced at Piaggio’s manufacturing facilities in Italy, India and the new engine plant outside Hanoi.

The 3V will be first seen in the Vespa LX and S 125 – 150 scooters and will be progressively rolled out to other Piaggio group models designed for this engine size such as Fly, Liberty, Typhoon etc.